M30201 datasheet(39/415 Pages) RENESAS

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Clock Generating Circuit

Mitsubishi microcomputers

M30201 Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Figure 1.20. Clock transition

Transition of stop mode, wait mode

Transition of normal mode

Reset

Medium-speed mode

(divided-by-8 mode)

Interrupt

CM10 = “1”

All oscillators stopped

CPU operation stopped

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

High-speed/medium-

speed mode

Low-speed/low power

dissipation mode

Normal mode

Stop mode

All oscillators stopped

Wait mode

CPU operation stopped

Interrupt

WAIT

instruction

Interrupt

WAIT

instruction

Interrupt

WAIT

instruction

CM10 = “1”

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: Transit in accordance with arrow.

(Refer to the following for the transition of normal mode.)

Power Saving

M30201 Datasheet(PDF) 39 Page - Renesas Technology Corp

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