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M306V2EEFS 데이터시트(PDF) 44 Page - Renesas Technology Corp

부품명 M306V2EEFS
상세설명  SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
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제조업체  RENESAS [Renesas Technology Corp]
홈페이지  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

M306V2EEFS 데이터시트(HTML) 44 Page - Renesas Technology Corp

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Rev.1.40
Oct 06, 2004 page 44 of 269
M306V2ME-XXXFP, M306V2EEFP
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
■ 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.
■ 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.
■ 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.
■ 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.



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