202
Bus
interface
CPU
[H'AA]
TEMP
[H'FF]
TCYH
[H'AA]
TCYL
[H'FF]
Module internal data bus
When reading the upper byte
CPU
[H'FF]
TEMP
[H'FF]
TCYH
[AB]
TCYL
[00]
Module internal data bus
When reading the lower byte
*
*
Note:
*
Becomes H'AB00 if counter is incremented once.
Bus
interface
Figure 9.17 TCY Read Operation (TCY
→
CPU)