M16C User Manual.pdf

Power ControlMitsubishi microcomputersM16C / 62 GroupSINGLE-CHIP 16-BIT CMOS MICROCOMPUTERTransition of stop mode, wait modeResetAll oscillators stoppedStop modeAll oscillators stoppedStop modeCM10 = “1”InterruptInterruptCM10 = “1”Medium-speed mode(divided-by-8 mode)High-speed/mediumspeedmodeWAITinstructionInterruptWAITinstructionInterruptCPU operation stoppedWait modeCPU operation stoppedWait modeAll oscillators stoppedStop modeCM10 = “1”InterruptLow-speed/low powerdissipation modeNormal modeWAITinstructionInterruptCPU operation stoppedWait mode(Refer to the following for the transition of normal mode.)Transition of normal modeCM06 = “1”Main clock is oscillatingSub clock is oscillatingHigh-speed modeBCLK : f(XIN)CM07 = “0” CM06 = “0”CM17 = “0” CM16 = “0”Medium-speed mode(divided-by-4 mode)BCLK : f(XIN)/4CM07 = “0” CM06 = “0”CM17 = “1” CM16 = “0”Main clock is oscillatingSub clock is stoppedMedium-speed mode(divided-by-8 mode)BCLK : f(XIN)/8CM07 = “0” CM06 = “1”CM04 = “0”CM04 = “1”(Notes 1, 3)Medium-speed mode(divided-by-2 mode)BCLK : f(XIN)/2CM07 = “0” CM06 = “0”CM17 = “0” CM16 = “1”Medium-speed mode(divided-by-16 mode)BCLK : f(XIN)/16CM07 = “0” CM06 = “0”CM17 = “1” CM16 = “1”Medium-speed mode(divided-by-8 mode)BCLK : f(XIN)/8CM07 = “0”CM06 = “1”CM07 = “0” (Note 1)CM06 = “1”CM04 = “0”CM07 = “0”(Note 1, 3)CM07 = “1”(Note 2)Main clock is oscillatingSub clock is oscillatingLow-speed modeBCLK : f(XCIN)CM07 = “1”CM05 = “0” CM05 = “1”CM04 = “0” Main clock is oscillatingSub clock is stoppedCM04 = “1”Medium-speed modeHigh-speed mode (divided-by-2 mode)BCLK : f(XIN)CM07 = “0” CM06 = “0”CM17 = “0” CM16 = “0”BCLK : f(XIN)/2CM07 = “0” CM06 = “0”CM17 = “0” CM16 = “1”CM07 = “1” (Note 2)CM05 = “1”Main clock is stoppedSub clock is oscillatingLow power dissipation modeBCLK : f(XCIN)CM07 = “1”CM06 = “0”(Notes 1,3)Medium-speed mode(divided-by-4 mode)BCLK : f(XIN)/4CM07 = “0” CM06 = “0”CM17 = “1” CM16 = “0”Medium-speed mode(divided-by-16 mode)BCLK : f(XIN)/16CM07 = “0” CM06 = “0”CM17 = “1” CM16 = “1”CM07 = “0” (Note 1)CM06 = “0” (Note 3)CM04 = “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 2.14.1. State transition diagram of power control mode439