
4. Using the I/O Address Map
CNT16-8(FIT)GY, CNT16-8L(FIT)GY
15
4.
Using the I/O Address Map
Starting I/O Address
When connected to a CPU-SBxx(FIT)GY, the Module can directly receive I/O commands from the
controller module. Depending on how the Device ID is set, the I/O addresses indicated below will be
used exclusively by the Module.
Because the address bus on which I/O address space is allocated is not fully decoded in 16 bits, four
starting I/O addresses exist for each Device ID.
If the Device ID is set to 0h, one of the four addresses (0800h, 0840h, 0880h, or 08C0h) will be used as
a starting I/O address.
Table 4.1. List of Starting I/O Addresses
< CNT16-8(FIT)GY, CNT16-8L(FIT)GY >
ID No.
Occupied I/O address
0
0800h - 081Fh(recommended)
0840h - 085Fh
0880h - 089Fh
08C0h - 08DFh
1
1800h - 181Fh(recommended)
1840h - 185Fh
1880h - 189Fh
18C0h - 18DFh
2
2800h - 281Fh(recommended)
2840h - 285Fh
2880h - 289Fh
28C0h - 28DFh
3
3800h - 381Fh(recommended)
3840h - 385Fh
3880h - 389Fh
38C0h - 38DFh
4
4800h - 481Fh(recommended)
4840h - 485Fh
4880h - 489Fh
48C0h - 48DFh
5
5800h - 581Fh(recommended)
5840h - 585Fh
5880h - 589Fh
58C0h - 58DFh
6
6800h - 681Fh(recommended)
6840h - 685Fh
6880h - 689Fh
68C0h - 68DFh
7
7800h - 781Fh(recommended)
7840h - 785Fh
7880h - 789Fh
78C0h - 78DFh
For detailed specifications on the I/O space that is managed by the controller module, see the controller
module manual.