
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
with DATA ACQUISITION CONTROLLER
MITSUBISHI MICROCOMPUTERS
39
Rev. 1.0
M306H2FCFP
Figure 2.5.5 State transition diagram of Power control mode
Transition of stop mode, wait mode
Transition of normal mode
Medium-speed mode
(divided-by-8 mode)
BCLK : f(XIN)/8
CM07 = “0” CM06 = “1”
Low-speed mode
High-speed mode
Main clock is oscillating
Sub clock is stopped
Main clock is oscillating
Sub clock is stopped
Main clock is stopped
Sub clock is oscillating
Main clock is oscillating
Sub clock is oscillating
Low power dissipation mode (Note 5)
Reset
Main clock is stopped
Sub clock is stopped
Medium-speed mode
(divided-by-8 mode)
Interrupt
CM10 = “1”
Stop mode
Wait mode
CPU operation stopped
Interrupt
WAIT
instruction
Main clock is stopped
Sub clock is stopped
High-speed/medium-
speed mode
Stop mode
Wait mode
CPU operation stopped
Interrupt
WAIT
instruction
CM10 = “1”
Interrupt
Main clock is stopped
Sub clock is stopped
CPU operation stopped
Low-speed/low power
dissipation mode
Stop mode
Wait mode
Interrupt
WAIT
instruction
Interrupt
CM10 = “1”
BCLK : f(XIN)/2
CM07 = “0” CM06 = “0”
CM17 = “0” CM16 = “1”
Medium-speed mode
(divided-by-2 mode)
BCLK : f(XIN)/16
CM07 = “0” CM06 = “0”
CM17 = “1” CM16 = “1”
Medium-speed mode
(divided-by-16 mode)
BCLK : f(XIN)/4
CM07 = “0” CM06 = “0”
CM17 = “1” CM16 = “0”
Medium-speed mode
(divided-by-4 mode)
BCLK : f(XIN)
CM07 = “0” CM06 = “0”
CM17 = “0” CM16 = “0”
BCLK : f(XIN)/8
Medium-speed mode
(divided-by-8 mode)
CM07 = “0”
CM06 = “1”
High-speed mode
BCLK : f(XIN)/2
CM07 = “0” CM06 = “0”
CM17 = “0” CM16 = “1”
Medium-speed mode
(divided-by-2 mode)
BCLK : f(XIN)/16
CM07 = “0” CM06 = “0”
CM17 = “1” CM16 = “1”
Medium-speed mode
(divided-by-16 mode)
BCLK : f(XIN)/4
CM07 = “0” CM06 = “0”
CM17 = “1” CM16 = “0”
Medium-speed mode
(divided-by-4 mode)
BCLK : f(XIN)
CM07 = “0” CM06 = “0”
CM17 = “0” CM16 = “0”
BCLK : f(XCIN)
CM07 = “1”
BCLK : f(XCIN)
CM07 = “1”
Main clock is oscillating
Sub clock is oscillating
CM07 = “0”
(Note 1, 3)
CM07 = “0” (Note 1)
CM06 = “1”
CM04 = “0”
CM07 = “1”
(Note 2)
CM07 = “0” (Note 1)
CM06 = “0” (Note 3)
CM04 = “1”
CM07 = “1” (Note 2)
CM05 = “1”
CM05 = “0”
CM05 = “1”
CM04 = “0”
CM04 = “1”
CM06 = “0”
(Notes 1,3)
CM06 = “1”
CM04 = “0”
CM04 = “1”
(Notes 1, 3)
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: T ransit in accordance with arrow.
Note 5: The device can be operated with a low supply voltage (VCC = 3.0 V)
in only low power dissipation mode. Always make sure the power
supply voltage VCC is switched between 5.0 V and 3.0 V in this mode
Normal mode
(Refer to the following for the transition of normal mode.)