Globalsat ET-314 GPS Engine Board Инструкция по эксплуатации онлайн [4/22] 88447

ET-314AC

High Performance GPS Engine Board

2010/4/1

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PIN Number(s) Name Type Description Note

1 VCC P Main power supply to the engine board.

2,10,30 GND P Ground.

3 BOOTSEL I Set this pin to high for programming flash. 2

4 RxD0 I

This is the main receive channel for receiving

software commands to the engine board from

SiRFdemo software or from user written

software.

5 TxD0 O

This is the main transmits channel for

outputting navigation and measurement data

to user’s navigation software or user written

software. Output TTL level, 0V ~ 2.85V.

6 TxD1 O Serial output (default null)

7 RxD1 I Serial input (default null) 1

GPIO14 I/O General purpose I/O

1,3

9,25,26 NC ET-314AC reserves PIN

11,12,13,14,

15,16,18

GND_A P GPS RF Ground.

17. RF IN RF GPS antenna input

19 V_ANT I Antenna Bias voltage

20 VCC_RF O Supply Antenna Bias voltage (V=VCC)

21 V_BAT P Backup battery supply voltage

22 RESET I System reset (active low)

23 VDD28OUT O Output voltage 2.85V

24 GPIO1 I/O General purpose I/O 2,3

27 GPIO13 I/O General purpose I/O 1,3

GPIO15 I/O

General purpose I/O 1,3

29 1PPS O One pulse per second output. 2,3

<Note>

1. Internal pull-up resistor (100KΩ nominal).

2. Internal pull-down resistor (100KΩ nominal).

3. Default input at reset.