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EVK-M91 - User guide

8 Board layout

8.1 PCB version B

The PCB for EVK-M91 is shown in

Figure 5: EVK-M91 PCB

UBX-19056858 - R04

8 Board layout

Page 17 of 27

C1-Public

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Содержание EVK-M91-00-01

Страница 1: ...User guide Abstract This document describes the structure and use of the EVK M91 evaluation kit and provides information for evaluating and testing u blox M9 positioning technology www u blox com UBX...

Страница 2: ...ument Copying reproduction or modi cation of this document or any part thereof is only permitted with the express written permission of u blox Disclosure to third parties is permitted for clearly publ...

Страница 3: ...10 5 1 2 USB 11 5 1 3 UART 11 5 1 4 SPI 12 5 1 5 I2C 12 5 2 GNSS input signal 13 5 2 1 Antenna connector 13 5 3 Time pulse 13 5 4 Reset button 13 5 5 Safeboot button 13 5 6 LED 14 5 7 Flash 14 5 8 Sup...

Страница 4: ...Revision history 26...

Страница 5: ...r vehicles Furthermore they can be used with a PDA or a notebook PC making them the perfect companion through all stages of design in projects Evaluation kit Description Supported products EVK M91 u b...

Страница 6: ...power supply pin 14 V5_IN and pin 1 GND Normal operating temperature 40 C to 65 C Table 2 EVK M91 speci cations 2 1 Safety precautions EVK M91 must be supplied by a PS1 class limited power source See...

Страница 7: ...with the Windows 7 and 8 operating systems the u blox GNSS standard driver x64bit is needed which can be found in the u center package 3 2 Hardware installation 1 Connect the EVK M91 to a PC running M...

Страница 8: ...EVK M91 User guide There are also SPI I2C and UART interfaces available for debugging and design in purposes on the digital connector UBX 19056858 R04 3 Getting started Page 8 of 27 C1 Public...

Страница 9: ...EVK M91 User guide 4 Approvals The EVK M91 complies with the Directive 2011 65 EU EU RoHS 2 and its amendment Directive EU 2015 863 EU RoHS 3 UBX 19056858 R04 4 Approvals Page 9 of 27 C1 Public...

Страница 10: ...onal measurement equipment can be connected to the front connector Figure 1 Connecting the unit for power supply and communication Figure 2 shows the front and the back panel of the EVK M91 evaluation...

Страница 11: ...e the RS 232 port use the UBX CFG VALSET command and select CFG UART1 Con guration group in the u center application The maximum operating baud rate is 921600 Bd If you are using a USB to RS 232 adapt...

Страница 12: ...erface selected chip select input LOW ACTIVE 4 SCL SCK I 3 0 V Clock input Can also be used as generic input output PIO4 3 TxD MISO O 3 0 V Serial port transmit or SPI slave transmit operation selecte...

Страница 13: ...the RF input The recommended maximum antenna supply current for active antennas is 40 mA and is limited by the internal antenna short circuit detection feature Please refer to 3 for more details In ad...

Страница 14: ...pplication use The remainder of the space is reserved for other features 5 8 Super capacitor The evaluation board includes a super capacitor to supply the backup power domain of the EVK M91 and is cha...

Страница 15: ...consumption To measure the total GNSS supply current with EVK M91 follow these steps 1 Power up EVK M91 2 Connect a true RMS voltmeter across GNSS I1 pin 12 and GNSS I2 pin 13 of the 14 pin connector...

Страница 16: ...r guide 7 Block diagram EVK M91 block diagram providing an overview on supply voltages and interfaces is shown in Figure 4 Figure 4 EVK M91 block diagram UBX 19056858 R04 7 Block diagram Page 16 of 27...

Страница 17: ...EVK M91 User guide 8 Board layout 8 1 PCB version B The PCB for EVK M91 is shown in Figure 5 Figure 5 EVK M91 PCB UBX 19056858 R04 8 Board layout Page 17 of 27 C1 Public...

Страница 18: ...rnal ash rmware if needed Subsequently this section also shows how to erase the rmware on the ash of EVK M91 if required for evaluation and boot the EVK M91 from the ROM rmware To view the currently i...

Страница 19: ...ter 4 Click GO 5 Poll UBX MON VER again to verify the updated rmware To erase the ash rmware follow the instructions below 1 Select Tools Firmware Update The rmware update window will appear as shown...

Страница 20: ...own in Figure 9 Figure 9 Checking EVK M91 rmware version from u center The ROM rmware SPG 4 04 has a default baudrate of 9600 and the ash rmware has a default baud rate of 38400 If UART interface is u...

Страница 21: ...g on this computer is using it EXTINT signal is not working when connecting the EVK using RS 232 UART to USB cable Disconnect the RS 232 UART to USB cable and use the EXTINT signal from the front pane...

Страница 22: ...EVK M91 User guide Figure 10 Setting GPS week number with u center GNSS evaluation software UBX 19056858 R04 10 Troubleshooting Page 22 of 27 C1 Public...

Страница 23: ...dBHz A low C N0 will result in a prolonged TTFF and more position drift When comparing side by side receivers make sure that all receivers have the same signal levels The best way to achieve this is b...

Страница 24: ...tic Discharge Galileo European navigation satellite system GLONASS Russian navigation satellite system GND Ground GNSS Global Navigation Satellite System GPS Global Positioning System IEC Internationa...

Страница 25: ...doc no UBX 19014285 5 NEO M9N Integration manual doc no UBX 19014286 6 u blox M9 SPG 4 04 Interface description doc no UBX 21022436 7 u center User guide doc no UBX 13005250 8 Information technology...

Страница 26: ...gure 5 for PCB version B in section 7 Added rmware update section 8 added glossary in appendix section R03 03 Nov 2020 msul Updated FW version to SPG 4 04 in page 2 added approvals section 4 updated g...

Страница 27: ...EVK M91 User guide Contact For further support and contact information visit us at www u blox com support UBX 19056858 R04 Page 27 of 27 C1 Public...

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