Rainbow-electronics T89C51CC01 Manual de usuario descargar pdf (Pagina 69)

T89C51CC01

Rev. D – 17-Dec-01

interrupt is pulled high. It is suggested that the WDT be reset during the interrupt service

for the interrupt used to exit Power Down.

To ensure that the WDT does not overflow within a few states of exiting powerdown, it is

best to reset the WDT just before entering powerdown.

In the Idle mode, the oscillator continues to run. To prevent the WDT from resetting

T89C51CC01 while in Idle mode, the user should always set up a timer that will periodi-

cally exit Idle, service the WDT, and re-enter Idle mode.

14.2.1 Register Table 34. WDTPRG Register

WDTPRG (S:A7h)

WatchDog Timer Duration

Programming register

Reset Value = XXXX X000b

76543210

- - - - - S2 S1 S0

Bit

Number

Bit

Mnemonic Description

Reserved