NEC PD750008 Manuale Utente

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Module 1:

SET1

SEL

SET1

MBE

MB15

BTM.3

Processing completes 
within 5.46 ms.

······

Module 2:

SET1

SEL

SET1

MBE

MB15

BTM.3

Processing completes 
within 5.46 ms.

···

The basic interval timer/watchdog  has the following functions regardless of whether it operates as a basic

interval timer or watchdog timer:

<1> Selecting and counting the wait time after the standby mode is released

<2> Reading the count

To allow the system clock to stabilize after releasing the STOP mode, a wait function is available which

stops the operation of the CPU until the basic interval timer (BT) overflows.

The wait time after generation of a RESET signal is fixed as specified by a mask option.  On the other

hand, a wait time can be selected by setting BTM when releasing the STOP mode with an interrupt

occurrence.  In this case, the wait times are the same as the interval times shown in Figure 5-24.  BTM

must be set before the STOP mode is set.  (For details, see Chapter 7.)

Set  the wait time 5.46 ms (at 6.00 MHz) in releasing the  STOP mode with an interrupt.

SET1

MBE

SEL

MB15

MOV

A, #1101B

MOV

BTM, A

; Set wait time

STOP

; Set STOP mode

NOP