NXP BU AUTOMOTIVE ATOP 2.5G Project TELEMATICS OM12000 (ATOP) HW user manual Info Document type Author Author Role Keywords Documentation Raf Peeters Content documentation Raf Peeters Application HW engineer ATOP 2.
NXP Semiconductors OM1200 (ATOP) Project Summary 1. Document purpose .................................................................................................. 3 Purpose ................................................................................................................................................... 3 Scope....................................................................................................................................................... 3 Support ..............
NXP Semiconductors 1. OM1200 (ATOP) Project Document purpose Purpose Purpose of this document isto provide an uszer manual for OM12000 by describing Telebox Mini HW, which serves as reference HW platform for NXP SW development and demo within context of ATOP (OM12000) 2.5G project. Scope This document is intended for all (HW/SW engineers, customers) who need detailed understanding of Telebox Mini v3.x HW implementation and schematics.
NXP Semiconductors 2. OM1200 (ATOP) Project Blockdiagram & photos © NXP N.V.
NXP Semiconductors © NXP N.V.
NXP Semiconductors 3.
NXP Semiconductors OM1200 (ATOP) Project Figure 1 :extract of schematics Telebox Mini v3.0 : powersupply & battery charger Main supply of the design is provided by the Li‐polymer battery , in this case PLF323450 from Varta Microbattery, typical capacity 570mAh. (connector J5) Since this battery sample has no built‐in NTC thermistor , R15 10k has been added to allow the baseband PNX charger function detect the battery presence.
NXP Semiconductors OM1200 (ATOP) Project (total path from battery up to supply pin of GPRS frontend poweramp) like connection wires, slideswitch, powerpath FET, pcb trace and internal battery impedance. The value actually implemented/needed on customer boards depends on requirements and implementation. The battery level can be measured via resistive divider R49 / R50, connected to the ADC input of the ATOP microcontroller LPC.
NXP Semiconductors OM1200 (ATOP) Project in case system current is expected to increase above the negotiated allowed max USB host currentdrain. The PNP part of Q28 will short the Gate_Source resistor R146 of VIN_to_VDC_5V FET T3_2 when the GPIO LPC_PIPESTAT(1) P2.2 is pulled LOW.
NXP Semiconductors 4. OM1200 (ATOP) Project RF Antenna connections GPRS Onboard the ATOP module there is an antenna RF switch in front of the poweramp. The Telebox Mini offers 2 ways for connecting a 50 ohm GPRS quad‐band antenna. GSM_ANT1: SMA jack J7 (SMA 19‐70‐4‐TGG Multicomp) R GSM_ANT2: UFL jack J8 (U.FL‐R‐SMT Hirose) This path is meant to accommodate some internal gprs antenna inside the product housing by means of 50 ohm U.FL cable assembly. Microcontroller GPIO ‘GSM_ANT_SWITCH’ P1.
NXP Semiconductors OM1200 (ATOP) Project 1 OFF ON 0 ON OFF Remark: for development this quadband GPRS antenna is used on GSM_ANT1 SMA: MC0114015‐FME‐BU‐W, manufactured MC‐Technologies http://www.mc‐ technologies.net/en/wireless_modules/antennen‐und‐zubehoer/index.php GPS The ATOP module has an onboard LNA which accommodates for a passive GPS antenna. This input of the LNA is connected to the U.FL connector J2.
NXP Semiconductors OM1200 (ATOP) Project Remark: for development following active GPS patch antenna is used: GAACZ‐A, , 5m cable , 3‐5V, manufactured by Active Robots Ltd. http://www.active‐ robots.co.uk/active‐gps‐antenna‐p‐552.html NFC The ATOP module has a NFC reader function onboard. Connector J3, Molex 53261‐0371, accommodates for the NFC coil. Stuff option C3 is for RF test , for normal use it is stuffed with 0 ohm jumper.
NXP Semiconductors OM1200 (ATOP) Project Connector J9, CCM03‐MK3 from C&K, accommodates for SIM card insertion. U5, PRTR5V0U4Y NXP, provides ESD protection. The Telebox Mini has a stuff option to accommodate a pcb soldered SIM chip (U6). (R38/R42 allow for possible future pinchange) In order to switch access between both SIM card options, analog mux U13 multiplexes the SIM data lines by GPIO control LPC_tracepkt(1) P2.6. Default stuff option R48 / R47 selects connector J9. R58 allows bypass/i.e.
NXP Semiconductors OM1200 (ATOP) Project There are 2 options on the Telebox Mini to source an external clock to the microcontroller LPC. 26M_EXT is a 26MHz output clock from the ATOP baseband. Buffer U11 buffers the clock signal , while R69/R65 resistive divider matches max voltage swing specified by the LPC. Another option for sourcing the LPC external clock is using the 12MHz crystal Y1 with the LPC own internal mainoscillator.
NXP Semiconductors OM1200 (ATOP) Project The ATOP microcontroller LPC has a USB2.0 full speed device controller onboard which can be accessed by mini‐B USB connector J10. U7 provides ESD protection with integrated pi‐type filter, 33ohm series resistors and 1k5 pullup resistor (connected to Q26 for delayed device detect signalling option). Also this USB connector is used as battery charger input.
NXP Semiconductors OM1200 (ATOP) Project In order to properly startup the baseband , there should not be any parasitic supply current present on the PNX pins before sending “power ON” command via LPC SW. So any input current should be avoided for all PNX IO pins (pcm, analog,…) In order to avoid RS232 transceiver on the PNX uart lines could unintentionally supply current, a buffer U9 has been inserted on the Telebox Mini to allow proper control by the microcontroller LPC via GPIO LPC_CAP0_1 P1.27.
NXP Semiconductors OM1200 (ATOP) Project The ATOP microcontroller LPC has 2 CAN controllers onboard (CAN2.0, 1Mbit/s). Telebox Mini accommodates one CAN controller with a high speed CAN transceiver, U2 TJA1042T, with some common mode choke option and ESD protection. The CAN interface is only functional when VDC_5V is applied to the system (either via USB or via external powersupply). When not powered, the transceiver has ideal passive behaviour, not disturbing eventually connected CAN bus.
NXP Semiconductors OM1200 (ATOP) Project 10. LED’s and buttons Reset switch Tact switch SW2 on the side of the board allows manual resetting the system. Ecall button Illuminated push button SW1 is intended as manual input from the user to initiate an Ecall. GPIO LPC_EINT0 P2.10 is low when the button is pushed. Since it is part of port2, this button is capable to wake up a powered down system. The button also has an integrated red LED to allow user interaction.
NXP Semiconductors OM1200 (ATOP) Project V3.2 changes: Removed stuff option R28/R30 for supply of LED’s. Since Vsys will be higher then 3V, U3 and U4 are not able to disable LED current … Following updated schematics: © NXP N.V.
NXP Semiconductors OM1200 (ATOP) Project 11. Accelerometer / Eeprom / SSI1 serial interface One synchronous serial interface SSI1 of ATOP microcontroller LPC is available for external device/user application (for instance to connect some serial display via the debugconnector J11) Onboard the Telebox Mini a 3D digital output accelerometer U10 LIS302DL (ST) is stuffed and connected with this SSI1 port as well as a SPI EEPROM U21 M95xxx.
NXP Semiconductors OM1200 (ATOP) Project Via resistors stuff options different combinations can be implemented for connection to CS0 or CS1 of SSI1 interface chipselect : Default stuffing: ‐ Accelero (CS_acc) : CS0 ‐ Eeprom (CS_mem) : CS1 ‐ External via debug connector (CS_ext): not connected Another stuffoption (via R81/R99) allows for connecting the accelero in I2C mode (this way making SSI1 also available for debuginterface connector at the same time) Default: Accelero in SPI mode V3.
NXP Semiconductors OM1200 (ATOP) Project 12. Audio connections Analog audio in The ATOP baseband PNX has two microphone input ports : EXTMIC_BIAS/EXTMIC_IN_P/EXTMIC_IN_N : not connected INTMIC_BIAS/INTMIC_IN_P/INTMIC_IN_N : implemented on Telebox Mini with necessary passive components and protection Default stuff option provides for the differential connection mode. Connector J15 accomodates for a standard 3.5mm mono plug electret microphone.
NXP Semiconductors OM1200 (ATOP) Project V3.2 changes : a) To make U15 stable when loaded , R161/C49 are required. Following updated schematics: Analog audio out The ATOP baseband PNX provides some analog output channels. 12.1.1 Earphone Telebox Mini has implemented earphone output channel EAR_OUTN/EAR_OUTP with necessary passive components and protection.
NXP Semiconductors OM1200 (ATOP) Project In the latter case , some annoying poweron ‘plop’ can be heared. This can be avoided by keeping the outputs to GND level during poweron (Q12 and Q13 are small footprint , and have very low ON resistance to minimize plop level).
NXP Semiconductors OM1200 (ATOP) Project V3.2 changes: a) In order to have speaker output accessible on the 3.5mm jack connector J14 (=earphone output default) some stuffing option is added : R100/R112. For this usecase following stuffing should be applied : Remove L5 /L6/R92/R93 Stuff R100/R112 Following updated schematics: 13. Board technology The Telebox Mini is targeted to be a HW platform for SW development and demo vehicle. It is a prototype, not intended to be mass production ready.
NXP Semiconductors OM1200 (ATOP) Project Pcb thickness : 1.2mm Number of layers: 6 : 1 .top 2 .gnd 3 .pwr 4 .in1 5 .in2 (=gnd2) 6 .bot Stack buildup technology used: Regarding the impedance control for 50 ohm RF antenna traces located on layer 1.top, layer 5. in2 is used as reference ground in order to keep RF trace wide enough to lower losses (instead of using layer 2.gnd). All other layers in between have been kept free of traces and copper around the transmission lines. Trace width : 0.
NXP Semiconductors OM1200 (ATOP) Project 14. Comments User Manual 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.
