Motorola MVME187 User Manual

Page of 173
General Description
2-3
2
Serial Ports
The serial ports support standard baud rates of 110 to 38.4K baud. 
All four serial ports use EIA-232-D drivers and receivers located on 
the main board, and all the signal lines are routed to the I/O 
connector. 
A functional description of the Serial Port Interface starts on page 
Parallel (Printer) Port
The 8-bit bidirectional parallel port may be used as a Centronics-
compatible parallel printer port or as a general parallel I/O port. 
A functional description of the Parallel Port Interface starts on page 
Ethernet Transceiver  Interface 
The Ethernet transceiver interface is located on the MVME187, and 
the industry standard connector is located on the MVME712X 
transition module. 
A functional description of the Ethernet Interface starts on page 
Serial
 Port
Function
Synchronous/ 
Asynchronous
Signals
Bit Rates
1
Minimum
Asynchronous
RXD, CTS, TXD, and RTS
and 
Full
Asynchronous
RXD, CTS, DCD, TXD, RTS, 
and DTR
 
4
Full 
Both
RXD, CTS, DCD, TXD, RTS, 
and DTR
Synchronous up 
to 64 k bits per 
second