M306V2ME Datasheet, PDF (44/276 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER

MITSUBISHI MICROCOMPUTERS
M306V2ME-XXXFP
M306V2EEFP
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
2.5.8 Power Control
The following is a description of the three available power control modes:
Modes
Power control is available in three modes.
(1) Normal operation mode
s High-speed mode
Divide-by-1 frequency of the main clock becomes the BCLK. The CPU operates with the internal
clock selected. Each peripheral function operates according to its assigned clock.
s Medium-speed mode
Divide-by-2, divide-by-4, divide-by-8, or divide-by-16 frequency of the main clock becomes the
BCLK. The CPU operates according to the internal clock selected. Each peripheral function operates
according to its assigned clock.
s Low-speed mode
fC becomes the BCLK. The CPU operates according to the fc clock. The fc clock is supplied by the
secondary clock. Each peripheral function operates according to its assigned clock.
s Low power consumption mode
The main clock operating in low-speed mode is stopped. The CPU operates according to the fc
clock. The fc clock is supplied by the secondary clock. The only peripheral functions that operate are
those with the sub-clock selected as the count source.
(2) Wait mode
The CPU operation is stopped. The oscillators do not stop.
(3) Stop mode
All oscillators stop. The CPU and all built-in peripheral functions stop. This mode, among the three
modes listed here, is the most effective in decreasing power consumption.
Figure 2.5.7 is the state transition diagram of the above modes.
Rev. 1.0
44