20-101-0732 Rabbit Semiconductor, 20-101-0732 Datasheet - Page 90

• Manufacturer Part Number: 20-101-0732
• Description: INTERFACE SMART SCREEN OP7100
• Manufacturer: Rabbit Semiconductor

Specifications of 20-101-0732

• Module/board Type: Single Board Computer Module
• For Use With/related Products: OP7100
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 20-101-732; 20-101-732

90
Out of the Box
Check the items mentioned in this section before starting development.
• Verify that the OP7100 runs in standalone mode before connecting any
• Verify that the entire host system has good, low-impedance, separate
• Do not connect analog ground to digital ground anywhere.
• Double-check the connecting ribbon cables to ensure that all wires go
• Verify that the host PC’s COM port works by connecting a good serial
• Use the supplied Rabbit Semiconductor power supply. If another power
• Use the supplied Rabbit Semiconductor cables. The most common fault
• Experiment with each peripheral device connected to the OP7100 to
• The frame ground and 0 V are connected internally via a jumper on
devices.
grounds for analog and digital signals. The OP7100 might be connected
between the host PC and another device. Any differences in ground
potential from unit to unit can cause serious problems that are hard to
diagnose.
to the correct screw terminals on the OP7100.
device to the COM port. Remember that COM1/COM3 and COM2/
COM4 share interrupts on a PC. User shells and mouse drivers, in
particular, often interfere with proper COM port operation. For
example, a mouse running on COM1 can preclude running Dynamic C
on COM3.
supply must be used, verify that it has enough capacity and filtering to
support the OP7100.
of user-made cables is failure to properly assert CTS. Without CTS
being asserted, theOP7100’s RS-232 port will not transmit. Assert CTS
by either connecting the RTS signal of the PC’s COM port or looping
back the OP7100’s RTS.
determine how it appears to the OP7100 when powered up, powered
down, and/or when its connecting wiring is open or shorted.
header JP5. Remove the jumper if this connection causes problems or
is otherwise not required.
Troubleshooting
OP7100