HD6435348R Hitachi Semiconductor, HD6435348R Datasheet - Page 213

• Manufacturer Part Number: HD6435348R
• Description: Single-Chip Microcomputer
• Manufacturer: Hitachi Semiconductor

10.4 Operation
10.4.1 FRC Incrementation Timing
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.
< Upper byte read >
< Lower byte read >
CPU writes
data H'AA
CPU writes
data H'55
Figure 10-2 (b) Read Access to FRC (When FRC Contains H'AA55)
Bus interface
Bus interface
Fig. 10-2 (b)
196
FRCH
[H'AA]
FRCH
[
]
TEMP
TEMP
[H'55]
[H'55]
[
FRCL
FRCL
[H'55]
Module data bus
Module data bus
]