HD6475348R Datasheet, PDF (213/487 Pages) Hitachi Semiconductor – Single-Chip Microcomputer

< Upper byte read >
CPU writes
data H'AA
Bus interface
Module data bus
TEMP
[H'55]
FRCH
[H'AA]
FRCL
[H'55]
< Lower byte read >
CPU writes
data H'55
Bus interface
Module data bus
TEMP
[H'55]
FRCH
[]
FRCL
[]
Figure 10-2 (b) Read Access to FRC (When FRC Contains H'AA55)
10.4 Operation
10.4.1 FRC Incrementation Timing
Fig. 10-2 (b)
The FRC increments on a pulse generated once for each period of the selected (internal or
external) clock source.
If external clock input is selected, the FRC increments on the rising edge of the clock signal.
Figure 10-3 shows the increment timing.
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