HD6435348R Hitachi Semiconductor, HD6435348R Datasheet - Page 89
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HD6435348R
Manufacturer Part Number
HD6435348R
Description
Single-Chip Microcomputer
Manufacturer
Hitachi Semiconductor
Datasheet
1.HD6435348R.pdf
(487 pages)
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3.8 CPU States
3.8.1 Overview
The CPU has five states: the program execution state, exception-handling state, bus-released
state, reset state, and power-down state. The power-down state is further divided into the sleep
mode, software standby mode, and hardware standby mode. Figure 3-11 summarizes these states,
and figure 3-12 shows a map of the state transitions.
ø
A
AS
R/W
DS
RD
WR
D –D
19
7
–A
0
0
Figure 3-10 (b) External Access Cycle (Write Access)
T state
1
69
Write cycle
Address
T state
“High”
2
Write data
T state
3
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