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Board Description and Memory Maps
1
COM1 & COM2 Universal Asynchronous
Receiver/Transmitter (UART)
Real-Time Clock and NVRAM
ISA Local Resource Bus
1-20
COM1 and COM2 are PC16550 Universal Asynchronous
Receiver/Transmitter (UART) to provide an asynchronous serial interface
for test/debug purposes. To facilitate proper baud rate generation, the
frequency of the input clock for the PC16550 UART is fixed at
1.8432 MHz. For additional programming details, refer to the PC16550
Data Sheet.
The SGS-Thomson M48T37 is used by the MVME5500 board to provide
32KB of non-volatile static RAM, real-time clock, and watchdog timer
functions. The device is accessed as linear memory. Refer to the MK48T37
Data Sheet for programming information.
The ISA local resources exist only if an IPMC712/761 module is mounted
on the MVME5500. Refer to the IPMC712/761 I/O Module Installation
and Use, listed in
Appendix B, Related
Documentation.
Computer Group Literature Center Web Site
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