Hitachi H8S/2646 Hardware Manual page 369

Examples of 8-bit register access operation are shown in figures 10-3, 10-4, and 10-5.
Internal data bus
H
Bus
L
master
Figure 10-3 8-Bit Register Access Operation [Bus Master ↔ TCR (Upper 8 Bits)]
Internal data bus
H
Bus
L
master
Figure 10-4 8-Bit Register Access Operation [Bus Master ↔ TMDR (Lower 8 Bits)]
Internal data bus
H
Bus
L
master
Figure 10-5 8-Bit Register Access Operation [Bus Master ↔ TCR and TMDR (16 Bits)]
Bus interface
Bus interface
Bus interface
TCR
TMDR
TCR TMDR
Module
data bus
Module
data bus
Module
data bus
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