HD6433802H Datasheet, PDF (208/435 Pages) Hitachi Semiconductor – Single-Chip Microcomputer

Figure 9.3 shows an example in which H'AA55 is written to TCF.
Write to upper byte
CPU
(H'AA)
Bus
interface
Module data bus
TEMP
(H'AA)
Write to lower byte
CPU
(H'55)
Bus
interface
TCFH
()
TCFL
()
Module data bus
TEMP
(H'AA)
TCFH
(H'AA)
TCFL
(H'55)
Figure 9.3 Write Access to TCR (CPU → TCF)
190