HD6433682 ETC, HD6433682 Datasheet - Page 70

• Manufacturer Part Number: HD6433682
• Description: Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Tiny Series
• Manufacturer: ETC

2.7
There are four CPU states: the reset state, program execution state, program halt state, and
exception-handling state. The program execution state includes active mode and subactive mode.
For the program halt state, there are a sleep mode, standby mode, and sub-sleep mode. These
states are shown in figure 2.11. Figure 2.12 shows the state transitions. For details on program
execution state and program halt state, refer to section 6, Power-Down Modes. For details on
exception processing, refer to section 3, Exception Handling.
Rev. 3.00, 05/03, page 40 of 472
CPU States
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
Figure 2.11 CPU Operation States
execution state
handling state
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 subclock
(high speed) mode
Subactive mode
Subsleep mode
Standby mode
Sleep mode
Active
Power-down
modes