HD6475328-CP10 HITACHI [Hitachi Semiconductor], HD6475328-CP10 Datasheet - Page 88

• Manufacturer Part Number: HD6475328-CP10
• Description: original Hitachi CMOS microcomputer unit (MCU)
• Manufacturer: HITACHI [Hitachi Semiconductor]

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