INTRODUCTION
WBPEEUI230019A0
2 - 1
SECTION 2 - DESCRIPTION AND OPERATION
INTRODUCTION
The IMMFP12 Multi-Function Processor Module functions like
a series of functional blocks working together. To explain how
the MFP module works, this section shows MFP module func-
tionality as a block diagram (refer to Figure
) and then
explains each block in the following text.
MICROPROCESSOR
The microprocessor, operating at 16 megahertz, enables mod-
ule operation and control. The operating system instructions
and function code library of the microprocessor reside in read
only memory (ROM). Since the microprocessor is responsible
for overall module operation, it communicates with all the
functional blocks. The microprocessor also constantly triggers
the machine fault timer (MFT) circuit. If the microprocessor or
module software fails and the MFT circuit is not reset, the MFT
Figure 2-1. IMMFP12 Module Functional Block Diagram
C L O C K /
TIM E R
M A C H IN E
FA U LT
TIM E R
I/O
E XPA N D E R
B U S
I/O
S EC T IO N
L E D S,
S W IT C H ES
A N D
C O N T R O L
O U TP U T
TO
P 2
TO
P 3
TO
P 1
B
A
TO
P 3
TO
P 3
T 01 6 98 A
S ER IA L
P O RT S
D M A S E C T IO N
C O N T R O LW AY
R E D U N D A N C Y
L IN K
D C S
L IN K
M IC R O P RO C E S S O R
N V R A M
R O M
R A M
D ATA BU S
