HD6433640 HITACHI [Hitachi Semiconductor], HD6433640 Datasheet - Page 57

• Manufacturer Part Number: HD6433640
• Description: H8/3644 Series Hardware Manual
• Manufacturer: HITACHI [Hitachi Semiconductor]

Note: See section 5, Power-Down Modes, for details on the modes and their transitions.
CPU state
A state in which some
or all of the chip
functions are stopped
to conserve power
A transient state in which the CPU changes
the processing flow due to a reset or an interrupt
The CPU is initialized
Program halt state
execution state
handling state
Reset state
Exception-
Program
Figure 2.14 CPU Operation States
The CPU executes successive program
instructions at high speed,
synchronized by the system clock
The CPU executes successive
program instructions at
reduced speed, synchronized
by the system clock
The CPU executes
successive program
instructions at reduced
speed, synchronized
by the subclock
Sleep (medium-speed)
(medium speed) mode
Sleep (high-speed)
(high speed) mode
Subactive mode
Subsleep mode
Standby mode
Watch mode
Active
Active
mode
mode
Low-power
modes
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