7641 datasheet(91/385 Pages) RENESAS

91 / 385 page

Rev.2.00

Aug 28, 2006

page 74 of 113

7641 Group

REJ09B0336-0200

HARDWARE

FUNCTIONAL DESCRIPTION

Notes

Reset

FSC0

“0”

←→“1”

XIN clock oscillating,

XCIN clock stopped,

Frequency synthesizer

clock stopped,

CPMA = 0C, FSC = 60

φ = f(XIN/4)

1 : Switch the mode by the allows shown between the mode blocks. (Do not switch between the modes directly without an allow.)

2 : In Stop mode, though the frequency synthesizer is not automatically disabled, the oscillator which sends clocks to the frequency

synthesizer stops. Set the system clock and disable the frequency synthesizer before execution of the STP instruction.

3 :

φ = f(XIN)/2 can be also used by setting the XIN divider select bit (CCR7) to “1”. Then this diagram also applies to that case.

4 : The frequency synthesizer’s input can be selected between XIN input and XCIN input regardless of the system clock. This diagram

assumes the frequency synthesizer’s input to be the system clock. Enable the oscillator to be used for the frequency synthesizer’s input

before enabling the frequency synthesizer.

5 : Select the XCIN input as the frequency synthesizer’s input by setting the frequency synthesizer input bit (FSC3) to “1” before stopping XIN

oscillation.

(Note 3)

XIN clock oscillating,

XCIN clock stopped,

Frequency synthesizer

clock oscillating,

CPMA = 0C, FSC = 41

φ = f(XIN/4)

CPMA6

“0”

←→“1”

XIN clock oscillating,

XCIN clock stopped,

Frequency synthesizer

clock oscillating,

CPMA = 4C, FSC = 41

φ = f(PLL)/2

(Note 3)

(Note 4)

WAIT

STOP

(Note 2)

WAIT

FSC0

“0”

←→“1”

XIN clock oscillating,

XCIN clock oscillating,

Frequency synthesizer

clock stopped,

CPMA = 1C, FSC = 60

φ = f(XIN/4) (Note 3)

XIN clock oscillating,

XCIN clock oscillating,

Frequency synthesizer

clock oscillating,

CPMA = 1C, FSC = 41

φ = f(XIN/4)

CPMA6

“0”

←→“1”

XIN clock oscillating,

XCIN clock oscillating,

Frequency synthesizer

clock oscillating,

CPMA = 5C, FSC = 41

φ = f(PLL)/2

(Note 3)

(Note 4)

(Note 2)

WAIT

STOP

WAIT

FSC0

“0”

←→“1”

XIN clock oscillating,

XCIN clock oscillating,

Frequency synthesizer

clock stopped,

CPMA = 9C, FSC = 60

φ = f(XCIN/2)

XIN clock oscillating,

XCIN clock oscillating,

Frequency synthesizer

clock oscillating,

CPMA = 9C, FSC = 41

φ = f(XCIN/2)

CPMA6

“0”

←→“1”

XIN clock oscillating,

XCIN clock oscillating,

Frequency synthesizer

clock oscillating,

CPMA = DC, FSC = 41

φ = f(PLL)/2

(Note 4)

(Note 2)

WAIT

STOP

WAIT

FSC0

“0”

←→“1”

XIN clock stopped,

XCIN clock oscillating,

Frequency synthesizer

clock stopped,

CPMA = BC, FSC = 68

φ = f(XCIN/2)

XIN clock stopped,

XCIN clock oscillating,

Frequency synthesizer

clock oscillating,

CPMA = BC, FSC = 49

φ = f(XCIN/2)

CPMA6

“0”

←→“1”

XIN clock stopped,

XCIN clock oscillating,

Frequency synthesizer

clock oscillating,

CPMA = FC, FSC = 49

φ = f(PLL)/2

(Note 2)

WAIT

STOP

WAIT

(Note 5)

(Note 4)

Remarks : This diagram assumes that:

•Stack page is page 1

•In single-chip mode

(Depending on the CPU mode register A)

•

φ expresses the internal clock.

Fig. 68 State transitions of clock

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