7906 datasheet(384/531 Pages) RENESAS

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FLASH MEMORY VERSION

7906 Group User’s Manual Rev.2.0

19-7

19.1 Overview

Fig. 19.1.3 Stop mode terminate sequence owing to interrupt request occurrence

q Interrupt request

to be used for

termination occurs.

q Clock input from pin XIN starts.

q Watchdog timer starts counting.

Operating

Stopped

Internal peripheral device

s When not using the watchdog timer

µs (Max.)

Operating

Stopped

Operate

CPU

Internal peripheral device

q Interrupt request to be used for

termination occurs.

q Oscillation stars.

(When an external clock is input

from pin XIN, clock input starts.)

q PLL frequency multiplier starts its

operation.

q Watchdog timer starts counting.

Value of watchdog timer

Value of the watchdog timer

Interrupt request to be

used for stop mode

termination

(Interrupt request bit)

Interrupt request to be

used for stop mode

termination

(Interrupt request bit)

FFF16

7FF16

q Watchdog timer's MSB = “0”

(However, watchdog timer interrupt

request dose not occur.)

q Each supply of

φCPU, φBIU starts.

q Interrupt request which was used for

termination is accepted.

Stop mode

fXIN

φBIU

φ1

q STP

instruction

is executed.

s When using the watchdog timer

fPLL (Note)

fXi ✕ 2048 counts

Note: This applies when the PLL circuit operation enable bit (bit 1 at address BC16) = “1.”

fXi : fX16, fX32, fX64, fX128

There are clocks selected by the watchdog timer clock source bits at STP termination (bits 6, 7 at address 6116)

q STP

instruction

is executed.

fXIN

φBIU

φ1

Stop mode

CPU

FFF16

7FF16

q Each supply of

φCPU, φBIU starts.

q Interrupt request which was used

for termination is accepted.

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