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LTE

Module BEC CBRS-12 User Manual

BEC CBRS-12 Hardware Design

LTE-A Module Series

Rev. BEC CBRS-12_Hardware_Design_V1.0

Date: 2019-06-06

Status: Released

www.billion.com

Summary of content (92 pages)

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LTE Module BEC CBRS-12 User Manual BEC CBRS-12 Hardware Design LTE-A Module Series Rev. BEC CBRS-12_Hardware_Design_V1.0 Date: 2019-06-06 Status: Released www.billion.
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LTE Module BEC CBRS-12 User Manual Our aim is to provide customers with timely and comprehensive service. For any assistance, please contact our company headquarters: Billion Electric Co., Ltd. 8F., No.192, Sec. 2, Zhongxing Rd., Xindian Dist., New Taipei City 23146, Taiwan Tel: ++886-2-2914-5665 Email: service@billion.com Or our local office. For more information, please visit: http:// http://www.billion.com/page/contact/index.
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LTE Module BEC CBRS-12 User Manual About the Document History Revision 1.
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LTE Module BEC CBRS-12 User Manual Contents About the Document ................................................................................................................................... 2 Contents ....................................................................................................................................................... 3 Table Index ...........................................................................................................................................
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LTE Module BEC CBRS-12 User Manual 3.11.3. BT UART Interface ......................................................................................................... 47 3.11.4. UART Application ........................................................................................................... 48 3.12. SPI Interface ............................................................................................................................ 49 3.13. PCM and I2C Interfaces ............................
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LTE Module BEC CBRS-12 User Manual 6.6.2. 6.7. 6.8. BEC CBRS-12 Receiving Sensitivity ......... 錯誤! 尚未定義書籤。錯誤! 尚未定義書籤。 Electrostatic Discharge ............................................................................................................ 77 Thermal Consideration ............................................................................................................ 77 7 Mechanical Dimensions ..............................................................................................
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LTE Module BEC CBRS-12 User Manual Table Index TABLE 1: FREQUENCY BANDS OF BEC CBRS-12 SERIES MODULE......................................................... 12 TABLE 2: KEY FEATURES OF BEC CBRS-12 ................................................................................................ 13 TABLE 3: I/O PARAMETERS DEFINITION ...................................................................................................... 18 TABLE 4: PIN DESCRIPTION ...............................................
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LTE Module BEC CBRS-12 User Manual TABLE 41: BEC CBRS-12 CURRENT CONSUMPTION .................................................................................. 76 TABLE 42: BEC CBRS-12 CURRENT CONSUMPTION ............... 錯誤! 尚未定義書籤。錯誤! 尚未定義書籤。 TABLE 43: RF OUTPUT POWER ..................................................................................................................... 76 TABLE 44: BEC CBRS-12 CONDUCTED RF RECEIVING SENSITIVITY.......................................................
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LTE Module BEC CBRS-12 User Manual Figure Index FIGURE 1: FUNCTIONAL DIAGRAM ............................................................................................................... 15 FIGURE 2: PIN ASSIGNMENT (TOP VIEW) .................................................................................................... 17 FIGURE 3: DRX RUN TIME AND CURRENT CONSUMPTION IN SLEEP MODE ......................................... 31 FIGURE 4: SLEEP MODE APPLICATION VIA UART INTERFACES ....................
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LTE Module BEC CBRS-12 User Manual FIGURE 38: COPLANAR WAVEGUIDE DESIGN ON A 4-LAYER PCB (LAYER 4 AS REFERENCE GROUND) ................................................................................................................................................................... 70 FIGURE 39: DIMENSIONS OF THE U.FL-R-SMT CONNECTOR (UNIT: MM) ............................................... 72 FIGURE 40: MECHANICALS OF U.FL-LP CONNECTORS .....................................................................
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LTE Module BEC CBRS-12 User Manual 1 Introduction This document defines the BEC CBRS-12 module and describes its air interface and hardware interfaces which are connected with customers’ applications. This document can help customers quickly understand module interface specifications, electrical and mechanical details, as well as other related information of BEC CBRS-12 module.
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LTE Module BEC CBRS-12 User Manual 1.1. Safety Information The following safety precautions must be observed during all phases of the operation, such as usage, service or repair of any cellular terminal or mobile incorporating BEC CBRS12 module. Manufacturers of the cellular terminal should send the following safety information to users and operating personnel, and incorporate these guidelines into all manuals supplied with the product.
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LTE Module BEC CBRS-12 User Manual 2 Product Concept 2.1. General Description BEC CBRS-12 is a LTE-TDD wireless communication module with receive diversity. It provides data connectivity on LTE-TDD networks. It supports embedded operating systems such as Windows, Linux and Android. It also provides GNSS 1) and voice functionality 2) to meet customers’ specific application demands. The following table shows the frequency bands and GNSS types of BEC CBRS-12 module.
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LTE Module BEC CBRS-12 User Manual Note: 1. 2. 1) GNSS function is optional. BEC CBRS-12 module contains Telematics version and Data-only version. Telematics version supports voice and data functions, while Data-only version only supports data function. 3. “*” means under development. 2) With a compact profile of 37.0mm × 39.5mm × 2.
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LTE Module BEC CBRS-12 User Manual (Challenge Handshake Authentication Protocol) usually used for PPP connections SMS Text and PDU mode Point to point MO and MT SMS cell broadcast SMS storage: ME by default (U)SIM Interfaces Support (U)SIM card: 1.8V/3.
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LTE Module BEC CBRS-12 User Manual Network Indication Two pins (NET_MODE and NET_STATUS) to indicate network connectivity status Antenna Interfaces Main antenna interface (ANT_MAIN) Rx-diversity antenna interface (ANT_DIV) Two MIMO antenna interfaces (ANT_MIMO1, ANT_MIMO2) GNSS antenna interface (ANT_GNSS) Physical Characteristics Size: (37.0±0.15)mm × (39.5±0.15)mm × (2.8±0.2)mm Weight: approx. 9.
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LTE Module BEC CBRS-12 User Manual 3 Application Interfaces 3.1. General Description BEC CBRS-12 is designed with 299 LGA pins that can be connected to cellular application platform.
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RESERVED 298 89 91 90 196 92 93 197 94 95 96 198 99 199 200 98 97 RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED ANT_MIMO1 101 100 103 102 201 202 104 105 107 106 203 109 108 204 205 110 111 112 206 207 114 113 ANT_MAIN ANT_MIMO2 RESERVED 115 117 116 209 118 119 120 210 208 RESERVED ANT_GNSS RESERVED RESERVED 121 211 122 123 212 124 125 133 85 135 83 215 216 217 218 219 220 221 222 80 79 140 78 141 GND 224 225 226 227 228 229 230
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LTE Module BEC CBRS-12 User Manual NOTES 1. 2. Keep all RESERVED pins and unused pins unconnected. GND pins 215~299 should be connected to ground in the design. 3.3. Pin Description The following tables show the pin definition and description of BEC CBRS-12 .
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LTE Module BEC CBRS-12 User Manual transmitting burst. If an SD card is used, connect VDD_P2 to SD_VDD. If an eMMC* is used or SDIO interface is unused, connect VDD_P2 to VDD_EXT. SD card power supply VDD_P2 135 PI VDD_EXT 168 PO Provide 1.8V for external circuit. Vnorm=1.8V IOmax=50mA VDD_RF 162 PO Provide 2.85V for external RF circuit. Vnorm=2.
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LTE Module BEC CBRS-12 User Manual VILmax=0.5V Active low. Status Indication Pin Name NET_MODE NET_ STATUS STATUS Pin No. 147 170 171 I/O Description DC Characteristics Comment DO Indicate the module’s network registration mode VOHmin=1.35V VOLmax=0.45V 1.8V power domain. If unused, keep it open. DO Indicate the module’s network activity status VOHmin=1.35V VOLmax=0.45V 1.8V power domain. If unused, keep it open. DO Indicate the module’s operation status VOHmin=1.35V VOLmax=0.
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LTE Module BEC CBRS-12 User Manual VOHmin=2.3V USIM1_ DATA 29 IO Data signal of (U)SIM1 card For 1.8V (U)SIM: VILmax=0.36V VIHmin=1.26V VOLmax=0.4V VOHmin=1.45V For 3.0V (U)SIM: VILmax=0.57V VIHmin=2.0V VOLmax=0.4V VOHmin=2.3V For 1.8V (U)SIM: Vmax=1.9V Vmin=1.7V USIM2_VDD USIM2_DAT A USIM2_DET USIM2_RST 74 77 78 79 PO IO DI DO Power supply for (U)SIM2 card Data signal of (U)SIM2 card (U)SIM2 card insertion detection Reset signal of (U)SIM2 card For 3.0V (U)SIM: Vmax=3.05V Vmin=2.
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LTE Module BEC CBRS-12 User Manual USIM2_CLK 80 DO Clock signal of (U)SIM2 card For 1.8V (U)SIM: VOLmax=0.4V VOHmin=1.45V For 3.0V (U)SIM: VOLmax=0.4V VOHmin=2.3V If (U)SIM2 interface is unused, keep it open. USB Interface Pin Name USB_VBUS USB_DM USB_DP USB_SS_ TX_M USB_SS_ TX_P USB_SS_ RX_P USB_SS_ RX_M Pin No. 32 33 34 37 38 40 41 I/O Description DC Characteristics PI USB connection detection Vmax=5.25V Vmin=3.3V Vnorm=5.0V IO USB 2.0 differential data bus - minus IO USB 2.
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LTE Module BEC CBRS-12 User Manual application: SDIO pull up power source eMMC application: Keep it open when used for eMMC SD_DATA0 49 IO SDIO data signal (bit 0) Vmax=1.9V Vmin=1.75V For 3.0V SD card: Vmax=3.05V Vmin=2.75V IOmax=50mA For 1.8V SD card: VOLmax=0.45V VOHmin=1.4V VILmin=-0.3V VILmax=0.58V VIHmin=1.3V VIHmax=2.0V For 3.0V SD card: VOLmax=0.35V VOHmin=2.15V VILmin=-0.3V VILmax=0.7V VIHmin=1.8V VIHmax=3.15V is supported by the module automatically.
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LTE Module BEC CBRS-12 User Manual RTS RXD DCD TXD RI DTR 57 58 59 60 61 62 Request to send VILmin=-0.3V VILmax=0.6V VIHmin=1.2V VIHmax=2.0V 1.8V power domain. If unused, keep it open. DI Receive data VILmin=-0.3V VILmax=0.6V VIHmin=1.2V VIHmax=2.0V 1.8V power domain. If unused, keep it open. DO Data carrier detection VOLmax=0.45V VOHmin=1.35V 1.8V power domain. If unused, keep it open. Transmit data VOLmax=0.45V VOHmin=1.35V 1.8V power domain. If unused, keep it open.
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LTE Module BEC CBRS-12 User Manual VOHmin=1.35V BT_CTS BT_RXD BT_RTS 164 165 166 DO DI Clear to send Receive data If unused, keep it open. BT UART interface pin by default. Can be multiplexed into SPI_MOSI. VOLmax=0.45V VOHmin=1.35V 1.8V power domain. If unused, keep it open. BT UART interface pin by default. Can be multiplexed into SPI_CLK. VILmin=-0.3V VILmax=0.6V VIHmin=1.2V VIHmax=2.0V 1.8V power domain. If unused, keep it open. BT UART interface pin by default.
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LTE Module BEC CBRS-12 User Manual PCM_IN PCM_CLK PCM_OUT I2S_MCLK 66 67 68 152 DI IO DO PCM data input VILmin=-0.3V VILmax=0.6V VIHmin=1.2V VIHmax=2.0V 1.8V power domain. If unused, keep it open. PCM clock VOLmax=0.45V VOHmin=1.35V VILmin=-0.3V VILmax=0.6V VIHmin=1.2V VIHmax=2.0V 1.8V power domain. In master mode, it is an output signal. In slave mode, it is an input signal. If unused, keep it open. PCM data output VOLmax=0.45V VOHmin=1.35V 1.8V power domain. If unused, keep it open.
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LTE Module BEC CBRS-12 User Manual control COEX_UART_ 145 TX COEX_UART_ 146 RX WLAN_EN 149 DO DI open. LTE/WLAN coexistence signal VOLmax=0.45V VOHmin=1.35V 1.8V power domain. If unused, keep it open. LTE/WLAN coexistence signal VILmin=-0.3V VILmax=0.6V VIHmin=1.2V VIHmax=2.0V 1.8V power domain. If unused, keep it open. DO WLAN function enable control VOLmax=0.45V VOHmin=1.35V 1.8V power domain. Active high. If unused, keep it open. VILmin=-0.3V VILmax=0.6V VIHmin=1.2V VIHmax=2.0V 1.
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LTE Module BEC CBRS-12 User Manual PCIE_RX_M 185 AI PCIe receiving minus PCIE_RX_P 186 AI PCIe receiving plus PCIE_CLK_ REQ_N PCIE_RST_N 188 189 PCIE_WAKE_ 190 N PCIe clock request VOLmax=0.45V VOHmin=1.35V VILmin=-0.3V VILmax=0.6V VIHmin=1.2V VIHmax=2.0V In master mode, it is an input signal. In slave mode, it is an output signal. If unused, keep it open. PCIe reset VOLmax=0.45V VOHmin=1.35V VILmin=-0.3V VILmax=0.6V VIHmin=1.2V VIHmax=2.0V In master mode, it is an output signal.
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LTE Module BEC CBRS-12 User Manual Pin Name Pin Name I/O RFFE_CLK 71 DO RFFE_DATA Description DC Characteristics Comment VOLmax=0.45V VOHmin=1.35V If unused, keep it open. VOLmax=0.45V VOHmin=1.35V VILmin=-0.3V VILmax=0.6V VIHmin=1.2V VIHmax=2.0V If unused, keep it open. 73 IO RFFE serial interface used for external tuner control Pin No. I/O Description DC Characteristics Comment DI Force the module to enter into emergency download mode VILmin=-0.3V VILmax=0.6V VIHmin=1.2V VIHmax=2.
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LTE Module BEC CBRS-12 User Manual 72, 91, 95, 134, 176, 192~195, 197~201, 209~213 3.4. Operating Modes The table below summarizes different operating modes of BEC CBRS-12 . Table 5: Overview of Operating Modes Mode Normal Operation mode Details Idle Software is active. The module has registered on the network, and it is ready to send and receive data. Talk/Data Network connection is ongoing. In this mode, the power consumption is decided by network setting and data transfer rate.
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LTE Module BEC CBRS-12 User Manual Figure 2: DRX Run Time and Current Consumption in Sleep Mode The following section describes power saving procedure of BEC CBRS-12 . 3.5.1.1. UART Application If the host communicates with the module via UART interfaces, the following preconditions can let the module enter into sleep mode.   Keep DTR at high level (pulled up by default). Execute AT+QSCLK=1 command to enable sleep mode. The following figure shows the connection between the module and the host.
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LTE Module BEC CBRS-12 User Manual 3.5.1.2. USB Application with USB Remote Wakeup Function If the host supports USB suspend/resume and remote wakeup function, the following three preconditions must be met to let the module enter into the sleep mode.    Keep DTR at high level (pulled up by default). Execute AT+QSCLK=1 command to enable the sleep mode. The host’s USB bus, which is connected with the module’s USB interface, has entered into suspend state.
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LTE Module BEC CBRS-12 User Manual Module Host VDD USB_VBUS USB Interface USB Interface RI EINT GND GND Figure 5: Sleep Mode Application with RI   Sending data to BEC CBRS-12 through USB will wake up the module. When BEC CBRS-12 has a URC to report, RI signal will wake up the host. 3.5.1.4. USB Application without USB Suspend Function If the host does not support USB suspend function, USB_VBUS should be disconnected with an external control circuit to let the module enter into sleep mode.
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LTE Module BEC CBRS-12 User Manual NOTE Please pay attention to the level match of the connection shown in dotted line between the module and the host. 3.5.2. Airplane Mode BEC CBRS-12 provides a W_DISABLE# signal to disable or enable airplane mode through hardware operation. The W_DISABLE# pin is pulled up by default. Driving it to low level will let the module enter into airplane mode. In airplane mode, the RF function will be disabled.
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LTE Module BEC CBRS-12 User Manual  Two VBAT_BB pins for module’s baseband part The following table shows details of VBAT pins and ground pins. Table 7: VBAT and GND Pins Pin Name Pin No. Description Min. Typ. Max. Unit VBAT_RF 85, 86 87, 88 Power supply for the module’s RF part 3.3 3.8 4.3 V VBAT_BB 155, 156 Power supply for the module’s baseband part 3.3 3.8 4.
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LTE Module BEC CBRS-12 User Manual To decrease voltage drop, a bypass capacitor of about 100µF with low ESR should be used, and a multi-layer ceramic chip (MLCC) capacitor array should also be reserved due to its ultra-low ESR. It is recommended to use three ceramic capacitors (100nF, 33pF, 10pF) for composing the MLCC array, and place these capacitors close to VBAT pins.
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LTE Module BEC CBRS-12 User Manual MIC29302WU DC_IN VBAT ADJ 5 3 1 51K OUT GND IN EN 2 4 100K 1% 470R 4.7K 470uF 100nF VBAT_EN 470uF 100nF 47K 1% 47K Figure 9: Reference Circuit of Power Supply NOTE In order to avoid damaging internal flash, please do not switch off the power supply when the module works normally. Only after the module is shut down by PWRKEY or AT command, the power supply can be cut off. 3.6.4.
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LTE Module BEC CBRS-12 User Manual VILmax=0.5V Active low. When BEC CBRS-12 is in power down mode, it can be turned on and enter into normal mode by driving the PWRKEY pin to a low level for at least 500ms. It is recommended to use an open drain/collector driver to control the PWRKEY. After STATUS outputs a high level, PWRKEY can be released. A simple reference circuit is illustrated in the following figure.
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LTE Module BEC CBRS-12 User Manual Figure 12: Timing of Turning on Module NOTE Please ensure that VBAT is stable for no less than 30ms before pulling down the PWRKEY. 3.7.2. Turn off the Module The following two methods can be used to turn off the module: using PWRKEY or AT+QPOWD command. 3.7.2.1. Turn off the Module Using PWRKEY Driving PWRKEY to a low level voltage for at least 800ms, the module will execute power-down procedure after the PWRKEY is released.
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LTE Module BEC CBRS-12 User Manual Figure 13: Timing of Turning off the Module 3.7.2.2. Turn off the Module Using AT Command It is also a safe way to use AT+QPOWD command to turn off the module. Please refer to document [2] for more details about the command. NOTES 1. 2. In order to avoid damaging internal flash, please do not switch off the power supply when the module works normally. Only after the module is shut down by PWRKEY or AT command, the power supply can be cut off.
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LTE Module BEC CBRS-12 User Manual VILmax=0.5V An open drain/collector driver or button can be used to control the RESET_N. A reference circuit is shown as below. Figure 14: Reference Circuit of RESET_N with a Driving Circuit Figure 15: Reference Circuit of RESET_N with a Button The reset scenario is illustrated in the following figure.
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LTE Module BEC CBRS-12 User Manual Figure 16: Timing of Resetting the Module NOTES 1. 2. RESET_N can only be used when turning off the module failed either by AT+QPOWD command or PWRKEY. Please ensure that there is no large capacitance on PWRKEY and RESET_N. 3.9. (U)SIM Interfaces BEC CBRS-12 provides two (U)SIM interfaces. The circuitry of (U)SIM interfaces meets ETSI and IMT-2000 requirements. Either 1.8V or 3.0V (U)SIM cards are supported.
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LTE Module BEC CBRS-12 User Manual BEC CBRS-12 supports (U)SIM card hot-plug via USIM_DET pins. The function supports low level and high level detections, and is disabled by default. Please refer to document [2] for more details about AT+QSIMDET command. The following figure shows a reference design for a (U)SIM interface with an 8-pin (U)SIM card connector.
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LTE Module BEC CBRS-12 User Manual In order to enhance the reliability and availability of the (U)SIM card in applications, please follow the criteria below in the (U)SIM circuit design:       Keep placement of the (U)SIM card connector to the module as close as possible. Keep the trace length as less than 200mm as possible. Keep (U)SIM card signals away from RF and VBAT traces. Ensure that the ground between the module and the (U)SIM card connector short and wide.
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LTE Module BEC CBRS-12 User Manual USB_SS_ RX_P 40 AI USB 3.0 super-speed receiving - plus USB_SS_ RX_M 41 AI USB 3.0 super-speed receiving - minus USB_ID 36 DI OTG identification OTG_PWR_EN 143 DO OTG power control Require differential impedance of 90Ω 1.8V power domain. If unused, keep it open For more details about the USB 2.0 & USB 3.0 specifications, please visit http://www.usb.org/home. The USB interface is recommended to be reserved for firmware upgrade in customers’ designs.
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LTE Module BEC CBRS-12 User Manual specifications.       It is important to route the USB 2.0 & 3.0 signal traces as differential pairs with total grounding. The impedance of USB differential trace is 90Ω. For USB 2.0 signal traces, the trace length should be less than 120mm, and the differential data pair matching should be less than 2mm (15ps). For USB 3.
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LTE Module BEC CBRS-12 User Manual 3.11.1. Main UART Interface The following table shows the main UART interface pin definition. Table 12: Pin Definition of Main UART Interface Pin Name Pin No. I/O Description Comment CTS 56 DO Clear to send 1.8V power domain RTS 57 DI Request to send 1.8V power domain RXD 58 DI Receive data 1.8V power domain DCD 59 DO Data carrier detection 1.8V power domain TXD 60 DO Transmit data 1.8V power domain RI 61 DO Ring indication 1.
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LTE Module BEC CBRS-12 User Manual BT_EN 3 DO BT function enable control BT_TXD 163 DO Transmit data BT_CTS 164 DO Clear to send BT_RXD 165 DI Receive data BT_RTS 166 DI Request to send 1.8V power domain If unused, keep it open. 3.11.4. UART Application BEC CBRS-12 provides 1.8V UART interfaces. A level translator should be used if the application is equipped with a 3.3V UART interface. A level translator TXS0108EPWR provided by Texas Instruments is recommended.
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LTE Module BEC CBRS-12 User Manual Figure 20: Level Translation Reference Circuit with an IC Please visit http://www.ti.com for more information. Another example with transistor translation circuit is shown as below. The circuit design of dotted line section can refer to the design of solid line section, and please pay attention to the direction of connection.
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LTE Module BEC CBRS-12 User Manual BT_TXD 163 DO Can be multiplexed into SPI_MOSI. BT_CTS 164 DO Can be multiplexed into SPI_CLK. 1.8V power domain BT_RXD 165 DI Can be multiplexed into SPI_MISO. BT_RTS 166 DI Can be multiplexed into SPI_CS. The following figure shows the timing relationship of SPI interface. Figure 22: Timing of SPI Interface The related parameters of SPI timing are shown in the following table. Table 17: Parameters of SPI Interface Timing Parameter Description Min.
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LTE Module BEC CBRS-12 User Manual t(mih) SPI master data input hold time 1.0 - - ns 3.13. PCM and I2C Interfaces BEC CBRS-12 supports audio communication via Pulse Code Modulation (PCM) digital interface and I2C interfaces.
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LTE Module BEC CBRS-12 User Manual Figure 24: Auxiliary Mode Timing The following table shows the pin definition of PCM interface and I2C interface, both of which can be applied on audio codec design. Table 18: Pin Definition of PCM interface and I2C Interface Pin Name Pin No. I/O Description Comment PCM_IN 66 DI PCM data input 1.8V power domain. If unused, keep it open. PCM_OUT 68 DO PCM data output 1.8V power domain. If unused, keep it open. IO PCM data frame synchronization signal 1.
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LTE Module BEC CBRS-12 User Manual Clock and mode can be configured by AT command, and the default configuration is master mode using short frame synchronization format with 2048kHz PCM_CLK and 8kHz PCM_SYNC. Please refer to document [2] for details about AT+QDAI command. The following figure shows a reference design of PCM interface with an external codec IC. MICBIAS PCM_CLK BCLK PCM_SYNC LRCK PCM_OUT DAC PCM_IN ADC I2C_SCL SCL I2C_SDA SDA INP INN LOUTP Module LOUTN Codec 1.
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LTE Module BEC CBRS-12 User Manual ADC0 173 General purpose analog to digital converter interface. If unused, keep it open. ADC1 175 General purpose analog to digital converter interface If unused, keep it open. The following table describes characteristics of ADC interfaces. Table 20: Characteristics of ADC Interfaces Parameter Min. ADC0 Voltage Range ADC1 Voltage Range Typ. Max. Unit 0 1.875 V 0 1.875 V ADC Resolution 15 bits NOTES 1. 2. 3.
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LTE Module BEC CBRS-12 User Manual Table 22: Working State of the Network Connection Status/Activity Indicator Pin Name Status Description Always High Registered on network Always Low Others Flicker slowly (200ms High/1800ms Low) Network searching Flicker slowly (1800ms High/200ms Low) Idle Flicker quickly (125ms High/125ms Low) Data transfer ongoing Always High Voice calling NET_MODE NET_STATUS A reference circuit is shown in the following figure.
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LTE Module BEC CBRS-12 User Manual Table 23: Pin Definition of STATUS Pin Name STATUS Pin No. 171 I/O Description Comment DO Indicate the module’s operation status 1.8V power domain If unused, keep it open. A reference circuit is shown as below. Figure 27: Reference Circuits of STATUS 3.17. Behavior of the RI AT+QCFG="risignaltype","physical" command can be executed to configure RI behavior. No matter on which port a URC is presented, the URC will trigger the behavior of RI pin.
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LTE Module BEC CBRS-12 User Manual URC RI outputs 120ms low pulse when a new URC returns The RI behavior can be changed by executing AT+QCFG="urc/ri/ring" command. Please refer to document [2] for more details. 3.18. PCIe Interface* BEC CBRS-12 provides one integrated PCIe (Peripheral Component Interconnect Express) interface which complies with the PCI Express Specification, Revision 2.1 and supports 5Gbps per lane. The PCIe interface of BEC CBRS-12 is only used for data transmission.
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LTE Module BEC CBRS-12 User Manual signal. If unused, keep it open. PCIE_WAKE _N 190 IO In master mode, it is an input signal. In slave mode, it is an output signal. If unused, keep it open. PCIe wake BEC CBRS-12supports either Root Complex (RC) or Endpoint (EP) Mode through software configuration. 3.18.1. Root Complex Mode In this mode, the module is configured to act as a PCIe RC device. The following figure shows a reference circuit of PCIe RC mode.
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LTE Module BEC CBRS-12 User Manual Test Points Minimize these stubs NM_0R R3 Module NM_0R MCU R4 USB_DM USB_DP PCIE_RX_P PCIE_RX_M PCIE_TX_P C1 100nF PCIE_TX_M C2 100nF ESD Array R1 0R R2 0R USB_DM USB_DP C3 100nF C4 100nF PCIE_TX_P PCIE_TX_M PCIE_RX_P PCIE_RX_M PCIE_REFCLK_P PCIE_REFCLK_P PCIE_REFCLK_M PCIE_REFCLK_M PCIE_RST_N PCIE_CLKREQ_N PCIE_WAKE_N GND PCIE_RST_N PCIE_CLKREQ_N PCIE_WAKE_N GND Figure 29: PCIe Interface Reference Circuit (EP Mode) In order to ensure the signal i
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LTE Module BEC CBRS-12 User Manual 2. output and software debugging. Firmware upgrade must be over USB2.0, while GNSS NMEA output and software debugging can be over USB2.0/3.0 (USB2.0 is recommended). “*” means under development. 3.19. SDIO Interface* BEC CBRS-12 provides one SDIO interface which supports SD 3.0 protocol and eMMC*. The following table shows the pin definition. Table 26: Pin Definition of SDIO Interface Pin Name Pin No. I/O Description Comment 1.8V/3.0V configurable output.
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LTE Module BEC CBRS-12 User Manual Module VDD_EXT SD_VDD + R7 100K SD_DATA3 SD_DATA2 SD_DATA1 SD_DATA0 SD_CLK SD_CMD SD_DET VDD_2V85 R8 100K R9 100K R10 100K R11 100K R12 470K SD Card Connector VDD C10 100uF C9 100nF R1 0R C8 33pF C7 10pF CD/DAT3 R2 0R DAT2 R3 0R DAT1 R4 0R DAT0 R5 0R CLK R6 0R CMD C1 NM D1 C2 NM D2 C3 NM D3 C4 NM D4 C5 NM D5 D7 C6 NM D6 DETECTIVE VSS Figure 30: Reference Circuit of SD Card Application Please follow the principles below in the SD card cir
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LTE Module BEC CBRS-12 User Manual 3.20. RFFE Interface* RFFE signals are used for external tuner control and should be routed to an appropriate antenna control circuitry. Table 27: Pin Definition of RFFE Interface Pin Name Pin No. I/O RFFE_CLK 71 DO RFFE_DATA 73 IO VDD_RF 162 PO Description RFFE serial interface used for external tuner control. Provide 2.85V for external RF circuit. Comment If unused, keep it open. If unused, keep it open. If unused, keep it open.
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LTE Module BEC CBRS-12 User Manual Figure 31: Reference Circuit of USB_BOOT Interface 3.22. GPIOs The module provides 5 GPIOs for customers’ design. Table 29: Pin Definition of GPIOs Pin Name Pin No. I/O Description GPIO_1 138 IO If unused, keep it open. GPIO_2 139 IO If unused, keep it open. GPIO_3 159 IO GPIO_4 161 IO If unused, keep it open. GPIO_5 172 IO If unused, keep it open. General purpose input/output port Comment If unused, keep it open.
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LTE Module BEC CBRS-12 User Manual 4 GNSS Receiver 4.1. General Description BEC CBRS-12 includes a fully integrated global navigation satellite system solution that supports Gen9HT-Lite of Qualcomm (GPS, GLONASS, BeiDou, Galileo and QZSS). BEC CBRS-12 supports standard NMEA-0183 protocol, and outputs NMEA sentences at 1Hz data update rate via USB interface by default. By default, BEC CBRS-12 GNSS engine is switched off. It has to be switched on via AT command.
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LTE Module BEC CBRS-12 User Manual Hot start @open sky Accuracy (GNSS) CEP-50 Autonomous 3 s XTRA enabled 2 s Autonomous @open sky 1.5 m 4.3. Layout Guidelines The following layout guidelines should be taken into account in customers’ design.     Maximize the distance among GNSS antenna, main antenna and Rx-diversity antenna. Digital circuits such as (U)SIM card, USB interface, camera module, display connector and SD card should be kept away from the antennas.
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LTE Module BEC CBRS-12 User Manual 5 Antenna Interfaces BEC CBRS-12 provides a main antenna interface, an Rx-diversity antenna interface, two MIMO antenna interfaces, and a GNSS antenna interface. The impedance of antenna ports is 50Ω. 5.1. Main/Rx-diversity/MIMO Antenna Interfaces 5.1.1. Pin Definition The pin definition of main antenna interface, Rx-diversity and MIMO antenna interfaces are shown as below. Table 31: Pin Definition of the Main/Rx-diversity/MIMO Antenna Interfaces Pin Name Pin No.
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LTE Module BEC CBRS-12 User Manual 5.1.3. Reference Design of RF Antenna Interfaces A reference design of ANT_MAIN, ANT_DIV, ANT_MIMO1 and ANT_MIMO2 interfaces is shown as below. It should reserve a π-type matching circuit for better RF performance. The π-type matching components (R1/C1/C2, R2/C3/C4, R3/C5/C6, R4/C7/C8) should be placed as close to the antennas as possible and are mounted according to the actual debugging. C1~C8 are not mounted and a 0Ω resistor is mounted on R1~R4 respectively by default.
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LTE Module BEC CBRS-12 User Manual 5.2. GNSS Antenna Interface 5.2.1. Pin Definition The following tables show pin definition and frequency specification of GNSS antenna interface. Table 33: Pin Definition of GNSS Antenna Interface Pin Name Pin No. I/O Description Comment ANT_GNSS 119 AI GNSS antenna interface 50Ω impedance 5.2.2. GNSS Frequency Table 34: GNSS Frequency Type Frequency Unit GPS 1575.42±1.023 MHz GLONASS 1597.5~1605.8 MHz Galileo 1575.42±2.046 MHz BeiDou 1561.098±2.
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LTE Module BEC CBRS-12 User Manual VDD 0.1uF 10R Module GNSS Antenna 47nH 100pF 0R ANT_GNSS NM NM Figure 33: Reference Circuit of GNSS Antenna Interface NOTES 1. 2. An external LDO can be selected to supply power according to the active antenna requirement. If the module is designed with a passive antenna, then the VDD circuit is not needed. 5.3. Reference Design of RF Layout For user’s PCB, the characteristic impedance of all RF traces should be controlled to 50Ω.
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LTE Module BEC CBRS-12 User Manual Figure 35: Coplanar Waveguide Design on a 2-layer PCB Figure 36: Coplanar Waveguide Design on a 4-layer PCB (Layer 3 as Reference Ground) Figure 37: Coplanar Waveguide Design on a 4-layer PCB (Layer 4 as Reference Ground) In order to ensure RF performance and reliability, the following principles should be complied with in RF 70
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LTE Module BEC CBRS-12 User Manual layout design:      Use an impedance simulation tool to accurately control the characteristic impedance of RF traces to 50Ω. The GND pins adjacent to RF pins should not be designed as thermal relief pads, and should be fully connected to ground. The distance between the RF pins and the RF connector should be as short as possible, and all the right-angle traces should be changed to curved ones.
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LTE Module BEC CBRS-12 User Manual 5.4.2. Recommended RF Connector for Antenna Installation If RF connector is used for antenna connection, it is recommended to use the U.FL-R-SMT connector provided by Hirose. Figure 38: Dimensions of the U.FL-R-SMT Connector (Unit: mm) U.FL-LP serial connector listed in the following figure can be used to match the U.FL-R-SMT. Figure 39: Mechanicals of U.
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LTE Module BEC CBRS-12 User Manual The following figure describes the space factor of mating plugs. Figure 40: Space Factor of Mating Plugs (Unit: mm) For more details, please visit http://www.hirose.com.
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LTE Module BEC CBRS-12 User Manual 6 Electrical, Reliability and Radio Characteristics 6.1. Absolute Maximum Ratings Absolute maximum ratings for power supply and voltage on digital and analog pins of the module are listed in the following table. Table 36: Absolute Maximum Ratings Parameter Min. Max. Unit VBAT_RF/VBAT_BB -0.3 4.7 V USB_VBUS -0.3 5.5 V Peak Current of VBAT_BB 0 1.0 A Peak Current of VBAT_RF 0 1.5 A Voltage at Digital Pins -0.3 2.3 V Voltage at ADC0 0 1.
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LTE Module BEC CBRS-12 User Manual 6.2. Power Supply Ratings Table 37: The Module’s Power Supply Ratings Parameter Description Conditions Min. Typ. Max. Unit VBAT VBAT_BB and VBAT_RF The actual input voltages must stay between the minimum and maximum values. 3.3 3.8 4.3 V USB_VBUS USB connection detection 3.3 5.0 5.25 V 6.3. Operation and Storage Temperatures The operation and storage temperatures are listed in the following table.
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LTE Module BEC CBRS-12 User Manual 6.4. Current Consumption 6.4.1. BEC CBRS-12 Current Consumption Table 39:BEC CBRS-12 Current Consumption Parameter Description Conditions Typ. Unit IVBAT OFF state Power down 20 uA AT+CFUN=0 (USB disconnected) 0.98 mA LTE-TDD PF=32 (USB disconnected) 2.54 mA LTE-TDD PF=64 (USB disconnected) 1.79 mA LTE-TDD PF=128 (USB disconnected) 1.41 mA LTE-TDD PF=256 (USB disconnected) 1.13 mA LTE-TDD PF=64 (USB Suspend) 2.
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LTE Module BEC CBRS-12 User Manual 6.6. RF Receiving Sensitivity The following tables show conducted RF receiving sensitivity of BEC CBRS-12. 6.6.1. BEC CBRS-12 Receiving Sensitivity Table 41: BEC CBRS-12 Conducted RF Receiving Sensitivity Frequency Primary Diversity SIMO1) 3GPP (SIMO) LTE-TDD B42 -98.4dBm -99.2dBm -102dBm -95dBm LTE-TDD B43 -98.5dBm TBD -101dBm -95dBm LTE-TDD B48 -98.2dBm -99.1dBm -104dBm -95dBm 6.7.
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LTE Module BEC CBRS-12 User Manual principles for thermal consideration:       On customers’ PCB design, please keep placement of the module away from heating sources, especially high power components such as ARM processor, audio power amplifier, power supply, etc. Do not place components on the opposite side of the PCB area where the module is mounted and do not fill that area with copper in order to facilitate adding of heatsink when necessary.
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LTE Module BEC CBRS-12 User Manual Figure 42: Referenced Heatsink Design (Heatsink at the Backside of Customers’ PCB) NOTES 1. 2. 3. Make sure that customers’ PCB design provides sufficient cooling solutions for the module: proper mounting, heatsinks, and active cooling may be required depending on the integrated application. In order to protect the components from damage, the thermal design should be maximally optimized to guarantee that the module’s internal temperature always maintains below 105°C.
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LTE Module BEC CBRS-12 User Manual 7 Mechanical Dimensions This chapter describes the mechanical dimensions of the module. All dimensions are measured in mm, and the tolerances for dimensions without tolerance values are ±0.05mm. 7.1.
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LTE Module BEC CBRS-12 User Manual Figure 44: Module Bottom Dimensions (Top View) 81
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LTE Module BEC CBRS-12 User Manual 7.2. Recommended Footprint Figure 45: Recommended Footprint (Top View) NOTE For easy maintenance of the module, please keep about 3mm between the module and other components in the host PCB.
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LTE Module BEC CBRS-12 User Manual 7.3. Design Effect Drawings of the Module Figure 46: Top View of the Module Figure 47: Bottom View of the Module NOTE This is renderings of BEC CBRS-12. For authentic appearance, please refer to the module that you receive from Billion.
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LTE Module BEC CBRS-12 User Manual 8 Storage, Manufacturing and Packaging 8.1. Storage BEC CBRS-12 is stored in a vacuum-sealed bag. It is rated at MSL 3, and its storage restrictions are listed below. 1. Shelf life in vacuum-sealed bag: 12 months at <40ºC/90%RH. 2. After the vacuum-sealed bag is opened, devices that will be subjected to reflow soldering or other high temperature processes must be:   Mounted within 168 hours at the factory environment of ≤30ºC/60%RH. Stored at <10% RH. 3.
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LTE Module BEC CBRS-12 User Manual 8.2. Manufacturing and Soldering Push the squeegee to apply the solder paste on the surface of stencil, thus making the paste fill the stencil openings and then penetrate to the PCB. The force on the squeegee should be adjusted properly so as to produce a clean stencil surface on a single pass. To ensure the module soldering quality, the thickness of stencil for the module should be 0.13-0.15mm. For more details, please refer to document [4].
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LTE Module BEC CBRS-12 User Manual Reflow time (D: over 220°C) 40 to 60 sec Max temperature 238°C ~ 245°C Cooling down slope 1 to 4°C/sec Reflow Cycle Max reflow cycle 1 8.3. Packaging BEC CBRS-12 is packaged in tape and reel carriers. Each reel is 10.56m long and contains 200 modules. The figures below show the packaging details, measured in mm.
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LTE Module BEC CBRS-12 User Manual Figure 50: Reel Specifications 87
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Federal Communication Commission Interference Statement This device complies with FCC 47 CFR Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to FCC 47 CFR Part 15 of the FCC Rules.
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************************************************************************ ************************ This module is intended for OEM integrators only. Per FCC KDB 996369 D03 OEM Manual v01 guidance, the following conditions must be strictly followed when using this certified module: KDB 996369 D03 OEM Manual v01 rule sections: 2.2 List of applicable FCC rules This module has been tested for compliance to FCC Part 96 CBRS as an End User Device. 2.
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2.9 Information on test modes and additional testing requirements This transmitter is tested in a standalone mobile RF exposure condition and any co-located or simultaneous transmission with other transmitter(s) or portable use will require a separate class II permissive change re-evaluation or new certification. 2.
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OEM/Host manufacturer responsibilities OEM/Host manufacturers are ultimately responsible for the compliance of the Host and Module. The final product must be reassessed against all the essential requirements of the FCC rule such as FCC Part 15 Subpart B before it can be placed on the US market. This includes reassessing the transmitter module for compliance with the Radio and EMF essential requirements of the FCC rules.