Communications Modules; Sm-Rs232; Introduction; Specifications - PEP Modular Computers Modular Computers RS485 User Manual

Chapter 6 Communications Modules

6. Communications Modules

6.1 SM-RS232

6.1.1 Introduction

The SM-RS232 provides serial communication observing a true RS232
interface definition. Interface parameters such as baud rate, stop bits, data
bits and parity are defined by software. The hardware itself supports baud-
rates up to 120 kbaud but the delivered software only allows rates up to
19200 baud. Communication tasks are handled directly by the SCC3 port of
the 68302 chip on the SMART-BASE hence this module can only be used in
the first slot of the SMART-BASE as this is the only slot where the CPU
port lines can be used serially. Two LEDs showing data transmission provide
the user interface.

6.1.2 Specifications

† CTS/DTR lines are NOT supported by PEP standard software. XON/
XOFF software protocol is used instead.
March 12, 1996
Input
Output
EEPROM
Front Panel
Power Consumption 23mW (min.), 75mW (max.)
Module Weight
ID Byte
©1996 PEP Modular Computers GmbH
SMART I/O User's Manual
Transceiver RxD and CTS
Up to 19200 Baud
Transceiver TxD and DTR
Up to 19200 Baud
256 Byte Serial EEPROM
Green RxD LED
Yellow TxD LED
30g
$80 Read by the SPI Interface
†
†
Page 6 - 5
6