General Description

Serial Ports

The serial ports support standard baud rates of 110 to 38.4K baud.

Serial

Function

Synchronous/

Signals

Bit Rates

Port

Asynchronous

 

 

 

 

 

 

 

 

1

Minimum

Asynchronous

RXD, CTS, TXD, and RTS

 

 

 

 

 

 

2

 

 

 

 

and

Full

Asynchronous

RXD, CTS, DCD, TXD, RTS,

 

3

 

 

and DTR

 

 

 

 

 

 

4

Full

Both

RXD, CTS, DCD, TXD, RTS,

Synchronous up

 

 

 

and DTR

to 64 k bits per

 

 

 

 

second

 

 

 

 

 

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 2-18.

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 2-20.

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 2-21.

2

2-3

Page 27
Image 27
Motorola MVME187 manual Serial Ports, Parallel Printer Port, Ethernet Transceiver Interface, Asynchronous