GR-87
GPS Module series
THE PRO NAME IN GPS
HOLUX Technology, Inc.
1F, No.30, R&D Road, Hsinchu 300, Taiwan (Hsinchu Science Industrial Park)
TEL: 886-3-6687000 FAX: 886-3-6687111 E-mail:[email protected]
Website:www.holux.com.tw
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3.3. Pin assignment of connector:
Table 4-1 is pin list of the 6-Pin Interface Connector. Connector is Male header
1.25mm pitch DIP R/A type. Actual pin size see appendix B.
Table 4-1 J1 connector pin definition:
Pin
Pin Name
Function description
1
VCC_5V
+3.5~5.5VDC power input
2
TXA
Serial Data output port A(CMOS Level: Voh
2.4V
≧
Vol
0.4V Ioh=Iol=2mA)
≦
3
RXA
Serial Data input port A(CMOS Level Vih
≧
0.7*VCC
Vil
≦
0.3*VCC)
4
RXB
Serial Data input port B(CMOS Level Vih
≧
0.7*VCC
Vil
≦
0.3*VCC)
5
GND
Power ground
6
TIMEMARK/
RESET (option)
TIMEMARK: 1PPS Time mark output(Vil
≦
0.2V Pulse
Width 1 usec
)。
RESET: Reset Input (Active Low)(option function)
3.3.1 VCC_5V
This is the main DC power supply for a +3.3~ 5.5 V engine board
。
3.3.2 TXA
This is the main transmitting channel and is used to output navigation and
measurement data for user written software
。
3.3.3 RXA
This is the main receiving channel and is used to receive software commands
to the board from user written software
。
3.3.4 RXB
This is the auxiliary receiving channel and is used to input differential
corrections to the board to enable DGPS navigation
。
3.3.5 GND
GND provides the ground for the board. Connect all grounds
。
