INTRODUCTION
I-E96-221A
2 - 1
SECTION 2 - DESCRIPTION AND OPERATION
INTRODUCTION
The IMCPM02 module hardware contains several functional
blocks working together. To understand how they work, this
section shows these in a block diagram and then explains each
block in the text. See Figure
THEORY OF OPERATION
When functioning as a CTT interface, the IMCPM02 module
accepts a module bus message from the CTT terminal and
sends the message to the destination module through the Con-
trolway or module bus. The module reply is then received by
the IMCPM02 module and returned to the CTT interface.
When functioning as an EWS interface, the IMCPM02 module
receives EWS commands, forwards them to the destination
module, and sends the reply to the EWS station over the
RS-232 channel. The CTT interface and EWS interface may
both be used at the same time.
Figure 2-1. Block Diagram of the IMCPM02 Module
T00068A
DATA BUS
TO 5-PIN CTT
CONNECTOR
ON FACEPLATE
TO P1 CARD
EDGE
CONNECTOR
A
B
TO P3 CARD
EDGE
CONNECTOR
TO DB25 EWS
PORT ON
FACEPLATE
TO DB9 ON
PC BOARD
(NOT USED)
SERIAL
CHANNEL
CH A
CH B
DMA
DMA
CONTROLWAY
MODULE BUS
LEDS
SWITCHES
RESET SWITCH
ROM
RAM
MACHINE
FAULT
TIMER
CPU
CLOCK/
TIMER
