Holux GR-87 Specification - page 7
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:info@holux.com.tw
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。