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5-3
Section
I/O Allocation for CPM2C PCs
324
CPU Unit Allocation
•
In the following diagrams, shaded areas indicate bits actually used for inputs or
outputs.
•
Input bits are allocated starting from IR 00000.
•
Output bits are allocated starting from IR 01000.
•
Bits in the output words that are not used as output bits can be used as work
bits.
•
Bits in the input words that are not used as input bits cannot be used as work
bits.
CPU Units with 10 I/O Points
CPM2C-10C
D
-
Inputs
Outputs
IR 000
IR 010
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
Do not use
6 inputs
IR 00000
to
IR 00005
4 outputs
IR 01000
to
IR 01003
Bits
CPU Units with 20 I/O Points
CPM2C-20C
D
-
Inputs
Outputs
IR 000
IR 010
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
Do not use
12 inputs
IR 00000
to
IR 00011
8 outputs
IR 01000
to
IR 01007
Bits