Evaluation board layout
Applicable receivers: BD990 | BD992 | BD992-INS
Current or prospective customers can obtain schematic drawings of the evaluation I/O board by contacting GNSSOEMSupport@trimble.com.
|
1 |
Ethernet |
8 |
D-Sub9 RS-232 CAN |
|
2 |
Type-B USB port device |
9 |
CAN/RS-232 switch |
|
3 |
Power input |
10 |
Reset button |
|
4 |
Power switch |
11 |
2 × 22 2 mm FEM header |
|
5 |
D-Sub9 RS-232 COM 2 |
12 |
BD99x board location |
|
6 |
Type-B USB VCP COM 1 |
13 |
External 10 MHz clock SMA connector |
|
7 |
D-Sub9 RS-232 COM 3 |
14 |
Toggle "ON" external 10 MHz clock |
The functionality to use an external 10 MHz clock (rather than the internal 10 MHz TCXO) requires that this clock is connected to the SMA connector (13) and that switch (14) is toggled “ON”, then the unit should be powered up. If switch (14) is toggled “ON” with no external 10 MHz clock to SMA connector (13), the CPU will not boot because no clock input is present.
