HD6475348R Datasheet, PDF (86/487 Pages) Hitachi Semiconductor – Single-Chip Microcomputer

3.7.4 Register Field Access Cycle (Addresses H'FE80 to H'FFFF)
ø
Internal address bus
T1 state
Memory cycle
T2 state
T3 state
Address
Internal Read signal
Internal data bus
(read access)
Internal Write signal
Internal data bus
(write access)
Read data
Write data
Figure 3-8 Register Field Access Timing
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