TMP93CS44 datasheet(31/224 Pages) TOSHIBA

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TMP93CS44/S45

2004-02-10

93CS44-29

Table 3.3.6 The Example of Warm-up Time after Releasing the STOP Mode

Warm-up Time [ms]

Clock Operation Frequency

after the STOP Mode

WDMOD<WARM>

= 0WDMOD<WARM> = 1

Clock Frequency

0.8192

3.2768

fc/2

1.6384

6.5536

fc/4

3.2768

13.1072

fc/8

6.5536

26.2144

fc/16

13.1072

52.4288

= 20 MHz

500

2000

= 32.768 kHz

How to calculate the warm-up time

WDMOD<WARM> = 0:

Clock operation frequency after the 2

14/STOP mode.

WDMOD<WARM> = 1:

Clock operation frequency after the 2

16/STOP mode.

The NORMAL/SLOW mode selection is possible after released STOP mode. This is

selected by SYSCR0<RSYSCK>. Therefore, Setting to <RSYSCK>, <RXEN>,

<RXTEN> is necessary before “HALT” instruction is executed.

Setting example: The STOP mode is entered when the low-frequency (fs) operates, and after that

high-frequency operates after releasing by NMI .

Address

SYSCR0

EQU

006EH

SYSCR1

EQU

006FH

WDMOD

EQU

005CH

8FFDH

(SYSCR1), 08H

; fSYS = fs/2.

9000H

RES

4, (WDMOD)

; Sets warm-up time to 214/fc.

9002H

(SYSCR0),

−11000 − − B

; Operates high frequency after released.

9005H

HALT

9006H

XX, XX

−: No change

Note: When different modes are used before and after STOP mode as the above mentioned, there is

possible to release the HALT mode without changing the operation mode by acceptance of the

halt release interrupt request during execution of “HALT” instruction (during 8 states). In the

system which accepts the interrupts during execution “HALT” instruction, set the same

operation mode before and after the STOP mode.

Clears and starts warm-up timer.

(High frequency)

NMI

End

NMI

Interrupt routine.

RETI

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