Ublox NEO-D9S, Руководство по интеграции

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NEO-D9S - Integration manual
Contents
1 Integration manual overview............................................................................................. 5
2 System description...............................................................................................................6
2.1 Overview.................................................................................................................................................... 6
2.1.1 Satellite L-band DGNSS................................................................................................................6
2.2 Architecture..............................................................................................................................................6
2.2.1 Block diagram..................................................................................................................................6
3 Receiver functionality.......................................................................................................... 7
3.1 Receiver configuration........................................................................................................................... 7
3.1.1 Changing the receiver configuration..........................................................................................7
3.1.2 Default L-band configuration.......................................................................................................7
3.1.3 Default interface settings............................................................................................................ 7
3.1.4 Basic receiver configuration.........................................................................................................8
3.1.5 L-band service selection............................................................................................................... 9
3.1.6 Power management.......................................................................................................................9
3.2 Communication interfaces................................................................................................................. 10
3.2.1 UART............................................................................................................................................... 11
3.2.2 I2C interface..................................................................................................................................12
3.2.3 SPI interface..................................................................................................................................15
3.2.4 USB interface................................................................................................................................ 16
3.3 Predefined PIOs.....................................................................................................................................17
3.3.1 D_SEL..............................................................................................................................................17
3.3.2 RESET_N........................................................................................................................................ 17
3.3.3 SAFEBOOT_N................................................................................................................................17
3.3.4 TX_READY..................................................................................................................................... 18
3.3.5 EXTINT............................................................................................................................................18
3.4 Antenna supervisor.............................................................................................................................. 19
3.4.1 Antenna voltage control - ANT_OFF........................................................................................20
3.4.2 Antenna short detection - ANT_SHORT_N............................................................................ 20
3.4.3 Antenna short detection auto recovery.................................................................................. 21
3.4.4 Antenna open circuit detection - ANT_DETECT................................................................... 21
3.5 Security................................................................................................................................................... 22
3.5.1 Receiver status monitoring....................................................................................................... 22
3.6 Forcing a receiver reset....................................................................................................................... 22
3.7 Firmware upload....................................................................................................................................22
4 Design..................................................................................................................................... 23
4.1 Pin assignment......................................................................................................................................23
4.2 Antenna...................................................................................................................................................24
4.2.1 Antenna bias................................................................................................................................. 27
4.3 Power supply..........................................................................................................................................29
4.3.1 VCC: Main supply voltage.......................................................................................................... 29
4.3.2 NEO-D9S power supply.............................................................................................................. 29
4.4 NEO-D9S minimal design................................................................................................................... 30
4.5 EOS/ESD precautions.......................................................................................................................... 31
4.5.1 ESD protection measures.......................................................................................................... 31
UBX-19026111 - R07 Contents Page 3 of 52
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