RTD Embedded Technologies, Inc.
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16
SYNC25104HR/
SYNC35104HR
User’s Manual
Table 7: CN13 RS-232 interface
Pin Name
Pin # Pin # Pin Name
DSR (1PPS)
2
1
DCD (1PPS)
RTS (PD)
4
3
RxD
CTS (NC)
6
5
TxD
RI (1PPS)
8
7
DTR (PD)
GND
10
9
GND
3.3.3
J
UMPERS
JP1: SyncBus Termination
JP1 is used to enable termination resistor on SyncBus lanes.
JP2: GPS Antenna Bias
JP2 is used to switch antenna bias on or off. Table 8.
Table 8: JP2 Settings
Setting Description
Notes
1 – 2
3.3V Bias Antenna
Factory default
Open
Passive Antenna
3.3.4
LED
S
D1: 1PPS LED
D1 shows the status of the GPS’s 1PPS signal.
D2: TBD
Function TBD.
D3: TBD
Function TBD.
D4: Loss of Lock LED
Indicates the lock status of SI5395.
3.4
Steps for Installing
1.
Always work at an ESD protected workstation and wear a grounded wrist-strap.
2.
Turn off power to the PC/104 system or stack.
3.
Select and install stand-offs to properly position the module on the stack.
4.
Remove the module from its anti-static bag.
5.
Check that pins of the bus connector are properly positioned.
6.
Check the stacking order; make sure all of the busses used by the peripheral cards are connected to the cpuModule.
7.
Hold the module by its edges and orient it so the bus connector pins line up with the matching connector on the stack.
8.
Gently and evenly press the module onto the PC/104 stack.
9.
If any boards are to be stacked above this module, install them.
10.
Attach any necessary cables to the PC/104 stack.
11.
Re-connect the power cord and apply power to the stack.
12.
Boot the system and verify that all of the hardware is working properly.