SIM7070 Series Hardware Design V1.03 SIM7028 Hardware Design LPWA Module SIMCom Wireless Solutions Limited. SIMCom Headquarters Building, Building 3, No. 289 Linhong Road Changning District, Shanghai P.R.China Tel: 86-21-31575100 support@simcom.com www.simcom.
SIM7028 Hardware Design V1.00 Document Title: Version: Date: Status: SIM7028 Hardware Design 1.00 2021-11-18 Release GENERAL NOTES SIMCOM OFFERS THIS INFORMATION AS A SERVICE TO ITS CUSTOMERS, TO SUPPORT APPLICATION AND ENGINEERING EFFORTS THAT USE THE PRODUCTS DESIGNED BY SIMCOM. THE INFORMATION PROVIDED IS BASED UPON REQUIREMENTS SPECIFICALLY PROVIDED TO SIMCOM BY THE CUSTOMERS.
SIM7028 Hardware Design V1.00 Version History Date Version Description of change 2021-04-08 1.00 Release 2021-09-18 1.00 Improve test data www.simcom.
SIM7028 Hardware Design V1.00 Contents 1 Introduction........................................................................................................................................ 8 1.1 1.2 1.3 1.4 Product Outline................................................................................................................................................. 8 Hardware Interface Overview................................................................................................................
SIM7028 Hardware Design V1.00 9.1 A.Related Documents....................................................................................................................................45 9.2 B. Terms and Abbreviations......................................................................................................................... 46 9.3 C. Safety Caution........................................................................................................................................... 48 www.
SIM7028 Hardware Design V1.00 Table Index Table 1: SIM7028 frequency bands.................................................................................................................................................... 8 Table 2: General features...................................................................................................................................................................10 Table 3: Lists the SIM7028 module pin numbers and pin definitions..............................
SIM7028 Hardware Design V1.00 Figure Index Figure 1: SIM7028 block diagram.....................................................................................................................................................10 Figure 2: SIM7028 Pin assignment overview..................................................................................................................................12 Figure 3: Dimensions (Unit: mm)................................................................................
SIM7028 Hardware Design V1.00 1 Introduction This document describes the electronic specifications, RF specifications, interfaces, mechanical characteristics and testing results of the SIMCom SIM7028 module. With the help of this document and other SIM7028 software application notes/user guides, users can understand and use SIM7028 module to design and develop applications quickly. 1.1 Product Outline The SIM7028 module support LTE Category NB2, 2-HARQ. The physical dimension of SIM7028 is 17.6mm ×15.
SIM7028 Hardware Design V1.00 1.2 Hardware Interface Overview The interfaces are described in detail in the next chapters include: ● Power Supply ● UART Interface ● SIM Interface ● ADC ● Power Output ● GPIOs ● Antenna Interface www.simcom.
SIM7028 Hardware Design V1.00 1.3 Hardware Block Diagram The block diagram of the SIM7028 module is shown in the figure below. Figure 1: SIM7028 block diagram 1.4 Functional Overview Table 2 describes the features of the SIM7028 modules. Table 2: General features Feature Implementation Power supply Power supply voltage：2.2V～4.3V. DRX:0.11mA (DRX=2.56s) eDRX:0.018mA (PTW=25.6s；eDRX=163.84s；DRX=2.56s) PSM mode Typical: 0.8uA Please refer to the table 1 LTE power class: 3 (23dBm±2.
SIM7028 Hardware Design V1.00 SIM interface UART1 interface UART0 Firmware upgrade Physical characteristics Temperature range Support identity card: 1.8V/3V. A full modem serial port by default Can be used as the AT commands Can be used for firmware upgrade and RF calibration Baud rate: default:115200bps Software debugging and debugging log output. The default baud rate is 3Mbps. Firmware upgrade over UART1 interface Size: 17.6mm×15.7mm×2.3 mm Weight: 1.3g±0.
SIM7028 Hardware Design V1.00 2 Package Information 2.1 Pin Assignment Overview All functions of the SIM7028 will be provided through 42 pads that will be connected to the customers’ platform. The Figure 2 is the pin assignment of the SIM7028. Figure 2: SIM7028 Pin assignment overview www.simcom.
SIM7028 Hardware Design V1.00 Table 3: Lists the SIM7028 module pin numbers and pin definitions Pin No. Pin Name Pin No.
SIM7028 Hardware Design V1.00 DO Digital output DOH Digital output with high level DOL Digital output with low level PU Pull up PD Pull down Table 5: Pin description Pin name Pin No. Default status Description 34、35 PI Power supply, voltage range: 2.2-4.3V. PO Power output. The voltage domain is 1.8V/3.3V optional. The default is 1.8 V. The output voltage of VDD_EXT will not exceed VBAT.
SIM7028 Hardware Design V1.00 SIM interface SIM_DATA 15 I/O SIM Card data I/O SIM_RST 17 DO SIM Reset SIM_CLK 16 DO SIM clock SIM_VDD 18 PO Power output for SIM card, its output Voltage depends on SIM card type automatically.
SIM7028 Hardware Design V1.00 2.3 Mechanical Information The following figure shows the package outline drawing of SIM7028. Figure 3: Dimensions (Unit: mm) www.simcom.
SIM7028 Hardware Design V1.00 2.4 Footprint Recommendation The following figure shows the Foot printer commended of the SIM7028. Figure 4: Footprint recommendation (Unit: mm) www.simcom.
SIM7028 Hardware Design V1.00 3 Interface Application 3.1 Power Supply Pin 34 and pin 35 are VBAT power input. The power supply for SIM7028 must be able to provide sufficient current up to more than 500mA in order to satisfy the power supply current for maximum consumption. The module can use an LDO with a low quiescent current output capability of 1 A as the power supply, or it can be powered by a battery.
SIM7028 Hardware Design V1.00 of 2.2V to 4.3V to the VBAT pin. NOTE 1.The voltage of VBAT must be lower than 0.7 V before power-on, and the power supply must rise to above 2.2 V within 10 ms. 2. After VBAT is powered on, RESET automatically rises to a high level due to an internal pull-up. 3. After the VBAT voltage rises above 2.2V, the system will automatically turn on. After turning on the VBAT voltage, the jitter cannot be lower than 2.2V, otherwise the system will be abnormal.
SIM7028 Hardware Design V1.00 Table 6: RESET pin electronic characteristic Symbol Description VIH The active low level time impulse on RESET pin to reset module Input high level voltage VIL Input high level voltage Treset Min. Typ. Max. Unit 50 - – ms 1.1 1.3 1.4 V - - 0.3 V 3.3 WAKEUP Description After SIM7028 enters sleep mode, it can be awakened by pulling down the WAKEUP pin. WAKEUP is a falling edge wake-up.
SIM7028 Hardware Design V1.00 Figure 8: WAKEUP wakes up the serial communication successfully The recommended circuit for WAKEUP is as follows: Figure 9: WAKEUP recommended circuit Table 7: WAKEUP pin electrical parameters Symbol Description Min. Typ. Max. Unit T The active low level time impulse 500 - – ms VIH Input high level voltage 1.1 1.3 1.4 V VIL Input low level voltage - - 0.
SIM7028 Hardware Design V1.00 Pin name Pin number I/O direction Description Comment IO_1833_SEL 20 I GPIO level control input When floating, the pin level is 1.1V When the IO_1833_SEL pin is floating, after setting "AT+VIOSET=1", the power domain of the module's GPIO is 1.8V. When "AT+VIOSET" is not set, its default value is "1". When the IO_1833_SEL pin is grounded, after setting "AT+VIOSET=3", the power domain of the GPIO port of the module will be set to 3.3V.
SIM7028 Hardware Design V1.00 SIM7028 download baud rate defaults to 115200bps. Download steps: first trigger the module to enter the download mode: to ensure that the module is successfully powered on, first pull down BOOT, then pull down RESET to reset the module. After the module is successfully reset, release RESET first, and then release it. BOOT, so the module will enter the download mode and wait for the data transmitted by the download tool.
SIM7028 Hardware Design V1.00 Figure 10: Connection of serial port with level matching When serial port of MCU does not match the serial port of the module, the voltage level translator circuit is recommended between them to let the voltage level match.
SIM7028 Hardware Design V1.00 down as the module goes to sleep, which cannot be awake by AT command through the serial port, only can be awake by WAKEUP pin. The external LDO as the power supply is recommended. 3.6 RI signal behaviors RI always keep at the high level, when SMS received or URC outputs, the module will inform DTE through RI pin. Figure 13: RI signal behaviors(SMS, URC) ※ Note For details of this AT command, please refer to document [1]. 3.
SIM7028 Hardware Design V1.00 Pin name Pin number I/O Description SIM_DATA 15 I/O SIM data input/output SIM_RST 16 DO SIM reset SIM_CLK 17 DO SIM_VDD 18 PO SIM clock Voltage supply for SIM card. Support 1.8V or 3V SIM card depends on SIM card type Comment ※ Note 3.0 V < VBAT ≤ 4.5 V, 1.8/3.0 V SIM card is supported; 2.2 V ≤ VBAT ≤ 3 V, only 1.8 V SIM card is supported. The following figure is the reference circuit for SIM card.
SIM7028 Hardware Design V1.00 Figure 15: NETLIGHT reference circuit NETLIGHT signal to control the network status LED, the pin status shown in the below table: Table 12: NETLIGHT pin status NETLIGHT pin status Module status 64ms ON, 800ms OFF No registered network 64ms ON, 2000ms OFF Registered network (PS domain registration success) OFF Power off or PSM mode www.simcom.
SIM7028 Hardware Design V1.00 www.simcom.
SIM7028 Hardware Design V1.00 4 Operation Mode 4.1 Operating mode SIM7028 module has modes which are listed below: Table 13: Module operating mode Mode function Description Power saving mode is not active, the system will stay in loop-waiting status, even has no tasks, high power consumption. All the function work properly for data transmitting and receiving. The core clock will be shut down when the system has no tasks, any interrupt could wake up the system and restart the core clock.
SIM7028 Hardware Design V1.00 could wake up the system and restart the core clock. AT+ECPMUCFG=1,2 Sleep1 AT+ECPMUCFG=1,3 Sleep2 AT+ECPMUCFG=1,4 Hibernate The module will shut down all the peripherals and part of registers based on the IDLE mode, the interrupt of the peripherals cannot wake up the system. The 256KB memory will be shut down based on SLEEP1 mode, only 16KB Retention Memory is kept. The 16KB Retention Memory will be shut down based on SLEEP2 mode.
SIM7028 Hardware Design V1.00 PSM will start after the data connection terminated or TAU updated. When the module connects to the network or update TAU, the network will send timer of T3324 and T3412 to the module, then the module will enter IDLE mode. In this mode, the module will transfer data with network(DRX status). When the timer of T3324 over time, the module will enter PSM.
SIM7028 Hardware Design V1.00 5 RF Specifications 5.1 LTE RF Specifications Table 15: Conducted transmission power Frequency Power Min. LTE-FDD B1 23dBm +/-2.7dB <-40dBm LTE-FDD B2 23dBm +/-2.7dB <-40dBm LTE-FDD B3 23dBm +/-2.7dB <-40dBm LTE-FDD B4 23dBm +/-2.7dB <-40dBm LTE-FDD B5 23dBm +/-2.7dB <-40dBm LTE-FDD B8 23dBm +/-2.7dB <-40dBm LTE-FDD B12 23dBm +/-2.7dB <-40dBm LTE-FDD B13 23dBm +/-2.7dB <-40dBm LTE-FDD B14 23dBm +/-2.7dB <-40dBm LTE-FDD B17 23dBm +/-2.
SIM7028 Hardware Design V1.00 MPR Tone positions for 3 Tones allocation MPR Tone positions for 3 Tones allocation MPR ≤ 0.5 dB 0 dB ≤ 0.5 dB 0-5 and 6-11 ≤ 1 dB ≤ 1 dB 0-11 ≤ 2 dB Table 17: E-UTRA operating bands E-UTRA UL Freq. DL Freq.
SIM7028 Hardware Design V1.00 13 <-108.2 14 <-108.2 17 <-108.2 18 <-108.2 19 <-108.2 20 <-108.2 25 <-108.2 26 <-108.2 28 <-108.2 66 <-108.2 70 <-108.2 85 <-108.2 5.2 LTE Antenna Design Guide Users should connect antennas to SIM7028 antenna pads through micro-strip line or other types of RF trace and the trace impedance must be controlled in 50Ω.
SIM7028 Hardware Design V1.00 default, the R1, R2 are 0Ω resistors, and the C1, C2 are reserved for tuning. The component D1 is a TVS for ESD protection, and it is optional for users according to application environment. The RF test connector is used for the conducted RF performance test, and should be placed as close as to the module’s MAIN_ANT pin. The traces impedance between SIM7028 and antenna must be controlled in 50Ω. Two TVS are recommended in the table below.
SIM7028 Hardware Design V1.00 Figure 19: Distance between RF trace and GND GND around the ANT pin of RF do not make pads to ensure the integration of the ground. 5.3.
SIM7028 Hardware Design V1.00 6 Electrical Specifications 6.1 Normal Operating Conditions Table 21: Recommended operating ratings Parameter Min. Typ. Max. Unit Voltage at VBAT 2.2 - 4.3 V Table 22: Operating temperature Parameter Min. Typ. Max.
SIM7028 Hardware Design V1.00 @ PTW=40.96s；eDRX=81.92s；DRX=2.56s, Typical： 0.15mA @ PTW=25.6s；eDRX=163.84s；DRX=2.56s, Typical： 0.
SIM7028 Hardware Design V1.00 B70 B85 @10dbm: 34mA @0dbm: 24mA @23dbm : 96mA @10dbm: 33mA @0dbm: 24mA @23dbm : 110mA @10dbm: 32mA @0dbm: 19mA @10dbm: 25mA @0dbm: 19mA @23dbm : 62mA @10dbm: 24mA @0dbm: 19mA @23dbm : 70mA @10dbm: 23mA @0dbm: 17mA @10dbm: 15mA @0dbm: 15mA @23dbm : 25mA @10dbm: 15mA @0dbm: 14mA @23dbm : 28mA @10dbm: 14mA @0dbm: 12mA @10dbm: 59mA @0dbm: 38mA @23dbm : 185mA @10dbm: 56mA @0dbm: 37mA @23dbm : 206mA @10dbm: 54mA @0dbm: 29mA 6.
SIM7028 Hardware Design V1.00 7 SMT Production Guide 7.1 Top and Bottom View of SIM7028 Figure 20: Top and bottom view of SIM7028 7.2 Typical SMT Reflow Profile SIMCom provides a typical soldering profile. Therefore the soldering profile shown below is only a generic recommendation and should be adjusted to the specific application and manufacturing constraints. Figure 21: The ramp-soak-spike reflow profile of SIM7028 7.
SIM7028 Hardware Design V1.00 Table 25: Moisture Sensitivity Level and Floor Life Moisture Sensitivity Level (MSL) Floor Life (out of bag) at factory ambient≤30°C/60% RH or as stated 1 Unlimited at ≦30℃/85% RH 2 1 year at ≦30℃/60% RH 2a 4 weeks at ≦30℃/60% RH 3 168 hours at ≦30℃/60% RH 4 72 hours at ≦30℃/60% RH 5 48 hours at ≦30℃/60% RH 5a 24 hours at ≦30℃/60% RH 6 Mandatory bake before use. After bake, it must be re-flowed within the time limit specified on the label. 7.
SIM7028 Hardware Design V1.00 8 Packaging 8.1 Tray packaging SIM7028 module support tray packaging. Figure 22: packaging diagram Module tray drawing： Figure 23: Tray drawing www.simcom.
SIM7028 Hardware Design V1.00 Table 27: Tray size Length（±3mm） Width（±3mm） Module number 242.0 161.0 50 Small carton drawing： Figure 24: Small carton drawing Table 28: Small Carton size Length（±10mm） Width（±10mm） Height（±10mm） Module number 270 120 50*20=1000 180 Big carton drawing： www.simcom.
SIM7028 Hardware Design V1.00 Figure 25: Big carton drawing Table 29: Big Carton size Length（±10mm） Width（±10mm） Height（±10mm） Module number 380 280 1000*4=4000 www.simcom.
SIM7028 Hardware Design V1.00 9 Appendix 9.1 A.Related Documents Table 30: Related Documents NO. Title [1] [2] 3GPP TS 51.010-1 [3] 3GPP TS 34.124 [4] 3GPP TS 34.121 [5] 3GPP TS 34.123-1 [6] 3GPP TS 34.123-3 [7] EN 301 908-02 V2.2.1 [8] EN 301 489-24 V1.2.1 [9] IEC/EN60950-1(2001) [10] 3GPP TS 51.010-1 [11] 2002/95/EC [12] [13] [14] [15] Module secondary-SMT-UGD-V1. xx HERACLES324G Series UART Application Note_V1.xx ETSI EN 301 908-13 (ETSI TS 136521-1 R13.4.
SIM7028 Hardware Design V1.00 9.2 B.
SIM7028 Hardware Design V1.
SIM7028 Hardware Design V1.00 9.3 C. Safety Caution Table 32: Safety Caution Marks Requirements When in a hospital or other health care facility, observe the restrictions about the use of mobiles. Switch the cellular terminal or mobile off, medical equipment may be sensitive and not operate normally due to RF energy interference. Switch off the cellular terminal or mobile before boarding an aircraft. Make sure it is switched off.
OEM/Integrators Installation Manual Important Notice to OEM integrators 1. This module is limited to OEM installation ONLY. 2. This module is limited to installation in mobile or fixed applications, according to Part 2.1091(b). 3. The separate approval is required for all other operating configurations, including portable configurations with respect to Part 2.1093 and different antenna configurations 4. For FCC Part 15.
Antenna (1) The antenna must be installed such that 20 cm is maintained between the antenna and users, (2) The transmitter module may not be co-located with any other transmitter or antenna. In the event that these conditions cannot be met (for example certain laptop configurations or co-location with another transmitter), then the FCC authorization is no longer considered valid and the FCC ID cannot be used on the final product.
Federal Communication Commission Interference Statement This device complies with 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 Part 15 of the FCC Rules.
This device is intended only for OEM integrators under the following conditions: (For module device use) 1) The antenna must be installed such that 20 cm is maintained between the antenna and users, and 2) The transmitter module may not be co-located with any other transmitter or antenna. As long as 2 conditions above are met, further transmitter test will not be required.
