Hitachi H8S/2633 Hardware Manual page 576

Upper-Byte Write
CPU
(H'AA)
Upper byte
Lower-Byte Write
CPU
(H'57)
Lower byte
Figure 14-2 (a) Access to DACNT (CPU Writes H'AA57 to DACNT)
556
Bus
interface
Bus
interface
Module data bus
TEMP
(H'AA)
DACNTH DACNTL
( ) (
Module data bus
TEMP
(H'AA)
DACNTH DACNTL
(H'AA) (H'57)
)