hd64338023s Renesas Electronics Corporation., hd64338023s Datasheet - Page 100

• Manufacturer Part Number: hd64338023s
• Description: Renesas 8-bit Single-chip Microcomputer Super Low Power Series
• Manufacturer: Renesas Electronics Corporation.

Section 2 CPU
Rev. 7.00 Mar 10, 2005 page 58 of 652
REJ09B0042-0700
CPU state
Note: See section 5, Power-Down Modes, for details on the modes and their transitions.
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
Figure 2.14 CPU Operation States
Reset state
Exception-
Program
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