HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 597

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

Section 18 Power-Down Modes
Section 18 Power-Down Modes
18.1
Overview
In addition to the normal program execution state, the H8S/2245 Group has power-down modes in
which operation of the CPU and oscillator is halted and power dissipation is reduced. Low-power
operation can be achieved by individually controlling the CPU, on-chip supporting modules, and
so on.
The H8S/2245 Group operating modes are as follows:
(1) High-speed mode
(2) Medium-speed mode
(3) Sleep mode
(4) Module stop mode
(5) Software standby mode
(6) Hardware standby mode
Of these, (2) to (6) are power-down modes. Sleep mode is a CPU mode, medium-speed mode is a
CPU and bus master mode, and module stop mode is an on-chip supporting module mode
(including bus masters other than the CPU). A combination of these modes can be set.
After a reset, the H8S/2245 Group is in high-speed mode.
Table 18.1 shows the conditions for transition to the various modes, the status of the CPU, on-chip
supporting modules, etc., and the method of clearing each mode.
Rev.3.00 Mar. 26, 2007 Page 555 of 772
REJ09B0355-0300