B
Technical Specifications
GPS/GLONASS Receiver User Manual Rev 1
53
Table B.2 64 Pin I/O Connector Description
Row B
Descriptions
Pin
Row A
Descriptions
GND
Digital Ground
1
GND
Digital Ground
+5V
Input, power supply
2
+5V
Input, power supply
*
Reserved for future use
3
N/C
LNA_PWR
Optional external power to antenna other than a standard
NovAtel GPS/GLONASS antenna (jumper plug P301 must be
correctly set)
4
GND
Digital Ground
N/C
5
*
For factory use only
N/C
6
*
For factory use only
N/C
7
GND
Digital Ground
N/C
8
DTR1
Data Terminal Ready for COM 1
CTS1
Clear to Send for COM 1
9
TXD1
Transmitted Data for COM 1
RTS1
Request to Send for COM 1
10
RXD1
Received Data for COM 1
DSR1
Data Set Ready for COM 1
11
DCD1
Data Carrier Detected for COM 1
N/C
12
N/C
N/C
13
*
For factory use only
N/C
14
*
For factory use only
N/C
15
GND
Digital Ground
N/C
16
DTR2
Data Terminal Ready for COM 2
CTS2
Clear to Send for COM 2
17
TXD2
Transmitted Data for COM 2
RTS2
Request to Send for COM 2
18
RXD2
Received Data for COM 2
DSR2
Data Set Ready for COM 2
19
DCD2
Data Carrier Detected for COM 2
N/C
20
N/C
VARF Output
Variable-frequency pulse train; normally high, active low. Pulse
width:100 ns - 6.55 ms. Frequency range: 0.15 Hz - 5 MHz.
21
GND
Digital Ground
1PPS Output
Normally high, active low, 1 ms
±
50 ns pulse is output at 1 Hz
(
±
50 ns when clock steering on). Falling edge is used as
reference.
22
GND
Digital Ground
Measure
Output
Normally high, active low pulse is 1 ms
±
50 ns wide. Falling
edge is used as the reference. 10 Hz repetition rate.
23
GND
Digital Ground
Mark Input
Normally high, active low input pulse must exceed 55 ns in
duration. The falling edge is the reference. TTL or contact closure
compatible.
24
GND
Digital Ground
STATUS
High level output indicates ’good solution’ or valid GPS position.
Low level output indicates ’no solution’.
25
GND
Digital Ground
*
For factory use only
26
GND
Digital Ground
*
For factory use only
27
GND
Digital Ground
\ RESET_IN
Reset TTL signal input from external system; active low.
28
GND
Digital Ground
RESET_OUT
Reset TTL signal output to external system; active high; 140 -
280 ms duration.
29
GND
Digital Ground
*
For factory use only
30
GND
Digital Ground
*
For factory use only
31
GND
Digital Ground
*
Kept high; for factory use only
32
GND
Digital Ground
