RS-232
The dimmPCITM provides a 10-pin header terminal RS232 port on the backplane capable of running at up to 230400bps. RS232 line drivers are integrated and no external components are required. The RTS and CTS lines are usable on the DCE configuration of the RS232 port. The DCD (Data Carrier Detect), DSR (Data Set Ready) and DTR (Data Transmit Ready) lines are not implemented on the dimmPCITM and are all connected to each other. The Ring Indicator line is not implemented on the dimmPCITM so no external serial devices can be intrinsically powered by RS232 serial port.
The RS-232 10-pin connector is compatible with an insulation displacement connector (IDC) DE9S (female 9-pin DB9 connector)
Figure 8. RS-232 Schematic
Watchdog
The watchdog on the dimmPCI platform can be used to protect the system and individual processes. When the process or the system hangs, the watchdog will force a reset.
Highlights
•Based on the Dallas DS1832 (3V version of the DS1232) watchdog
•Uses ‘/dev/watchdog’ as do the normal Linux watchdogs.
•The number of seconds remaining until timeout is available by reading the device.
cat /dev/watchdog