HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 99

• Manufacturer Part Number: HD6412240
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

2.8
2.8.1
The CPU has five main processing states: the reset state, exception handling state, program
execution state, bus-released state, and power-down state. Figure 2.14 shows a diagram of the
processing states. Figure 2.15 indicates the state transitions.
Note: * The power-down state also includes a medium-speed mode, module stop mode etc.
Processing
states
Processing States
Overview
See section 18, Power-Down Modes, for details.
Exception-handling
Program execution
Bus-released state
Power-down state
The CPU and all on-chip supporting modules have been
initialized and are stopped.
A transient state in which the CPU changes the normal
processing flow in response to a reset, interrupt, or trap
instruction.
The CPU executes program instructions in sequence.
The external bus has been released in response to a bus
request signal from a bus master other than the CPU.
CPU operation is stopped
to conserve power. *
Figure 2.14 Processing States
Reset state
state
state
Rev.3.00 Mar. 26, 2007 Page 57 of 772
Hardware standby
Software standby
Sleep mode
mode
mode
REJ09B0355-0300
Section 2 CPU