Trimble Outdoors 58052-00 Benutzerhandbuch

1 0      COPERNICUS REFERENCE BOARD

1 0 2      Copernicus GPS Receiver

The Copernicus GPS reference board power and data I/O functions are integrated into 
a single 8-pin header connector designated J7. The J7 connector uses 0.15 inch (3.8 
mm) high pins on 0.0787 inch (2 mm) spacing. See the Copernicus GPS reference 
board schematics, earlier in this chapter.

Table 10.1

Copernicus Reference Board Pin Description.

The Copernicus GPS reference board requires +3.0 VDC to 3.6 VDC. The receiver 
power is supplied through pin 2 of the I/O connector.

The Copernicus GPS reference board also provides an input for back-up power used 
when Copernicus is put in Standby mode and prime power is turned off. Back-up 
power is used to keep the Copernicus RAM memory alive and to power the real-time 
clock. RAM memory is used to store the GPS almanac, ephemeris, last position, and 
user configuration data, including port parameters.

1

TXD-B

Port B transmit, CMOS/TTL

2

VCC

3.0 VDC to 3.6 VDC 

3

TXD-A

Port A transmit, CMOS/TTL

4

VBack

3.0 VDC to 3.3 VDC 
The STANDBY supply shall be at least 0.3V less than 
VCC.

5

RXD-A

Port A receive, CMOS/TTL

6

1 PPS

Pulse-Per-Second, CMOS/TTL

7

RXD-B

Port B receive, CMOS/TTL

8

GND

Ground, Power and Signal