Novatel OEM6, User Manual

Page: 130 / 175

130 OEM6 Family Installation and Operation User Manual Rev 7
Figure 61: Top-view, P1500 Main Connector 24-Pin Header
Pin Signal Type Description Comments
1 GND GND Ground Reference –
2
USER1
a
Input/Output General Purpose I/O 2.7 V CMOS levels, 4 mA drive (3.3 V
compatible)
3 VARF Output Variable Frequency 2.7 V CMOS levels, 4 mA drive (3.3 V
compatible)
4 PPS Output Time Mark Output, synchronous
to GPS time
2.7 V CMOS levels, 4 mA drive (3.3 V
compatible)
5 VCC PWR +3.3 V Supply Voltage ±-5%
6 VCC PWR +3.3 V Supply Voltage ±5%
7
RXD3/EVENT2
b
Input External Event 2/COM3 Receive
Data
2.7 V CMOS levels (3.3 v compatible)
8 EVENT1 Input External Event 1 2.7 V CMOS levels (3.3 v compatible)
9 ERROR Output Error Detected 2.7 V CMOS levels, 4 mA drive (3.3 V
compatible)
10 PVALID Output Position Valid 2.7 V CMOS levels, 4 mA drive (3.3 V
compatible)
11 CTS2 Input COM2 Clear to Send 2.7 V CMOS levels (3.3 V compatible)
12 RESETIN Input Hardware Reset Internally pulled up. Active low reset – hold
below 0.8 V for a minimum of 50 milliseconds
13 RTS2 Output COM2 Request to Send 2.7 V CMOS levels, 4 mA drive (3.3 V
compatible)
14 RXD2 Input COM2 Receive Data 2.7 V CMOS levels (3.3 V compatible)
15 CTS1/RXD1- Input COM1 Clear to Send (RS-232)/
COM1 Receive Data- (RS-422)
CTS1: RS232 levels (±25 V tolerant)
RXD1-: RS422 levels (2 V differential typical)
16 TXD2 Output COM2 Transmit Data 2.7 V CMOS levels, 4 mA drive (3.3 V
compatible)
17 RTS1/TXD1- Output COM1 Request to Send (RS-
232)/
COM1 Transmit Data- (RS-422)
RTS1: RS232 levels (±5.4 V typical)
TXD1-: RS422 levels (2 V differential typical)
18 RXD1/RXD1+ Input COM1 Receive Data (RS-232)/
COM1 Receive Data+ (RS-422)
RXD1: RS232 levels (±25 V tolerant)
RXD1+: RS422 levels (2 V differential
typical)
19 TXD3/USER0
b
Input/Output General Purpose I/O/COM3
Transmit Data
2.7 V CMOS levels, 4 mA drive (3.3 V
compatible)
20 TXD1/TXD1+ Output COM1 Transmit Data (RS-232)/
COM1 Transmit Data+ (RS-422)
TXD1: RS232 levels (±25 V tolerant)
TXD1+: RS422 levels (2 V differential
typical)
21 D- Input/Output USB D- 90 Ω differential pair, 5 V tolerant
22 D+ Input/Output USB D+
23 GND GND Ground Reference –
24 GND GND Ground Reference –
a. On power up, if pin 2 is LOW or not connected, COM1 is configured as RS-232. If pin 2 is high, COM1 is
configured as RS-422 (refer to OEM6 Card Default Serial Port Configurations on page 31 ).
b. Through firmware, COM3 serial port operation (LVTTL) can be configured on pins 7 and 19. See OEM615 and
OEM617D Receivers on page 31 .