Trimble Outdoors 58052-00 Benutzerhandbuch
Copernicus GPS Receiver 4 3
INTERFACE CHARACTERISTICS 3
Pin Description
Table 3.1
Pin Description
G: Ground; I: Input; O: Output; P: Power
Pin
Name
Description
Function
Note
1
GND
Ground
G
Signal ground. Connect to common ground.
2
GND
RF Ground
G
One of two RF grounds adjacent to RF input.
Connect to RF ground system.
Connect to RF ground system.
3
RF Input
GPS RF input
I
50-ohm unbalanced (coaxial) RF input.
4
GND
RF Ground
G
One of two RF grounds adjacent to RF input.
Connect to RF ground system.
Connect to RF ground system.
5
LNA_XEN
LNA Enable
O
Can be used with active antennas only. Active
low logic level signal to control external LNA.
low logic level signal to control external LNA.
6
Reserved
Reserved
I/O
Do not connect.
7
OPEN
Antenna OPEN
I
Logic level from external antenna detection
circuit. See “Antenna Detect Truth Table”.
circuit. See “Antenna Detect Truth Table”.
8
SHORT
Antenna SHORT
I
Logic level from external antenna detection
circuit. See “Antenna Detect Truth Table”.
circuit. See “Antenna Detect Truth Table”.
9
Reserved
Reserved
I
Connect to VCC.
10
Reserved
Reserved
I
Connect to VCC.
11
XRESET
Reset
I
Active low logic level reset. Connect to VCC
with or without a pullup resistor, if not used.
with or without a pullup resistor, if not used.
12
VCC
Supply voltage
P
Module power supply 2.7 - 3.3 VDC
13
GND
Ground
G
Signal ground. Connect to common ground.
14
GND
Ground
G
Signal ground. Connect to common ground.
15
GND
Ground
G
Signal ground. Connect to common ground.
16
XSTANDBY
Run/Standby
I
Selects “RUN” or “STANDBY” mode. Connect
to VCC if not used (run only).
to VCC if not used (run only).
17
Reserved
Reserved
I/O
Do not connect.
18
Reserved
Reserved
I/O
Do not connect.
19
PPS
Pulse per second
O
Logic level timing signal at 1 Hz. Do not
connect if not used.
connect if not used.
20
RXD_B
Serial port B receive
I
Logic level secondary serial port receive.
21
RXD_A
Serial port A receive
I
Logic level primary serial port receive.
22
Reserved
Reserved
I/O
Do not connect.
23
TXD_A
Serial port A transmit
O
Logic level primary serial port transmit.
24
TXD_B
Serial port B transmit
O
Logic level secondary serial port transmit.
25
Reserved
Reserved
I/O
Do not connect.
26
Reserved
Reserved
I/O
Do not connect.
27
GND
Ground
G
Signal ground. Connect to common ground.
28
GND
Ground
G
Signal ground. Connect to common ground.