參數(shù)資料
型號(hào)： M30100
廠商： Renesas Technology Corp.
英文描述： SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
中文描述： 單片16位CMOS微機(jī)
文件頁數(shù)： 28/164頁
文件大?。?/td> 3302K
代理商： M30100
Power Control
deveopment
Tentative Specifications REV.E1
Specifications in this manual are tentative and subject to change.
Mitsubishi microcomputers
M30100/M30102 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
27
Power Control
This section gives an overview of power control.
Modes
There are three power save modes.
(1) Normal operating mode
High-speed mode
In this mode, one main clock cycle forms BCLK. The CPU operates on the BCLK. The peripheral
functions operate on the clocks specified for each respective function.
Medium-speed mode
In this mode, the main clock is divided into 2, 4, 8, or 16 to form BCLK. The CPU operates on the
BCLK. The peripheral functions operated on the clocks specified for each respective function.
Low-speed mode
In this mode, fc forms BCLK. The CPU operates on the fc clock. fc is the clock supplied by the
subclock. The peripheral functions operate on the clocks specified for each respective function.
Low power-dissipation mode
This mode is selected when the main clock is stopped from low-speed mode. The CPU operates on
the fc clock. fc is the clock supplied by the subclock. Only the peripheral functions for which the
subclock was selected as the count source continue to run.
Ring oscillator mode
This mode sets the ring oscillator as BCLK. The ring oscillator can be set to no division, 2-divisions, 4-
division, 8-division, or 16-division mode according to the settings for CM06, CM16, and CM17. In-
creasing the division ratio lowers power consumption. When the microcomputer is operating with the
ring oscillator, the X
IN
clock driver can be stopped by setting the main clock stop bit to “1.” This can
lower the power dissipation even more.
(2) Wait mode
CPU operation is halted in this mode. The oscillator continues to run.
(3) Stop mode
All oscillators stop in this mode. The CPU and internal peripheral functions all stop. Of all 3 power
saving modes, power savings are greatest in this mode. The mode cannot be shifted to the stop mode
directly from the ring oscillator mode.
Figure 1.9.1 and 1.9.2 show the transition between each of the three modes, (1), (2), and (3).
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