M16C62N Datasheet, PDF (35/213 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Power control
Mitsubishi microcomputers
M16C / 62N Group (80-pin)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Transition of stop mode, wait mode
Reset
CM07 = “0”
CM06 = “1”
CM05 = “0”
CM10 = “1”
(Note)
All oscillators stopped
Stop mode
CM10 = “1”
Interrupt
Medium-speed mode
(divided-by-8 mode)
Interrupt
All oscillators stopped
Stop mode
CM10 = “1”
All oscillators stopped
Stop mode
CM10 = “1”
Interrupt
High-speed/medium-
speed mode
Low power Low-speed
dissipation mode
mode
Low-speed/low power
dissipation mode
Normal mode
WAIT
instruction
Interrupt
CPU operation stopped
Wait mode
WAIT
instruction
Interrupt
CPU operation stopped
Wait mode
WAIT
instruction
Interrupt
CPU operation stopped
Wait mode
(Refer to the following for the transition of normal mode.)
Note : To CM0, CM1 registers, do a simultaneous write by word access.
Transition of normal mode
Main clock is oscillating
Sub clock is stopped
Medium-speed mode
(divided-by-8 mode)
CM06 = “1”
BCLK : f(XIN)/8
CM07 = “0” CM06 = “1”
Main clock is oscillating CM04 = “0”
Sub clock is oscillating
CM04 = “1”
(Notes 1, 3)
High-speed mode
Medium-speed mode
(divided-by-2 mode)
BCLK : f(XIN)
CM07 = “0” CM06 = “0”
CM17 = “0” CM16 = “0”
BCLK : f(XIN)/2
CM07 = “0” CM06 = “0”
CM17 = “0” CM16 = “1”
Medium-speed mode
(divided-by-8 mode)
Medium-speed mode Medium-speed mode
(divided-by-4 mode) (divided-by-16 mode)
BCLK : f(XIN)/8
CM07 = “0”
CM06 = “1”
BCLK : f(XIN)/4
CM07 = “0” CM06 = “0”
CM17 = “1” CM16 = “0”
BCLK : f(XIN)/16
CM07 = “0” CM06 = “0”
CM17 = “1” CM16 = “1”
CM07 = “0” (Note 1)
CM06 = “1”
CM04 = “0”
CM07 = “0”
(Note 1, 3)
CM07 = “1”
(Note 2)
Main clock is oscillating
Sub clock is oscillating
Low-speed mode
BCLK : f(XCIN)
CM07 = “1”
CM05 = “0”
CM05 = “1”
CM06 = “0”
(Notes 1,3)
CM04 = “0” _{Main clock is oscillating} CM04 = “1”
Sub clock is stopped
High-speed mode
Medium-speed mode
(divided-by-2 mode)
BCLK : f(XIN)
CM07 = “0” CM06 = “0”
CM17 = “0” CM16 = “0”
BCLK : f(XIN)/2
CM07 = “0” CM06 = “0”
CM17 = “0” CM16 = “1”
Medium-speed mode
(divided-by-4 mode)
BCLK : f(XIN)/4
CM07 = “0” CM06 = “0”
CM17 = “1” CM16 = “0”
Medium-speed mode
(divided-by-16 mode)
BCLK : f(XIN)/16
CM07 = “0” CM06 = “0”
CM17 = “1” CM16 = “1”
Main clock is stopped
Sub clock is oscillating
Low power dissipation mode
CM07 = “1” (Note 2)
CM05 = “1”
CM07 = “0” (Note 1)
CM06 = “0” (Note 3)
CM04 = “1”
BCLK : f(XCIN)
CM07 = “1” CM06 = “1”
CM15 = “1”
CM03 = “1”
Note 1: Switch clock after oscillation of main clock is sufficiently stable.
Note 2: Switch clock after oscillation of sub clock is sufficiently stable.
Note 3: Change CM06 after changing CM17 and CM16.
Note 4: Transit in accordance with arrow.
Figure 1.9.5. State transition diagram of Power control mode
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