HT49R50 datasheet(38/59 Pages) HOLTEK

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CLR WDT1

Preclear watchdog timer

Description

The TD, PD flags and WDT are all cleared (re-counting from zero), if the

other preclear WDT instruction has been executed. Only execution of this in-

struction without the other preclear instruction sets the indicated flag which

implies that this instruction has been executed and the TO and PD flags re-

main unchanged.

Operation

WDT ¬ 00H*

PD and TO ¬ 0*

Affected flag(s)

TC2 TC1

¾¾

¾¾¾¾

CLR WDT2

Preclear watchdog timer

Description

The TO, PD flags and WDT are all cleared (re-counting from zero), if the

other preclear WDT instruction has been executed. Only execution of this in-

struction without the other preclear instruction sets the indicated flag which

implies that this instruction has been executed and the TO and PD flags re-

main unchanged.

Operation

WDT ¬ 00H*

PD and TO ¬ 0*

Affected flag(s)

TC2 TC1

¾¾

¾¾¾¾

CPL [m]

Complement data memory

Description

Each bit of the specified data memory is logically complemented (1 s comple-

ment). Bits which previously contained a one are changed to zero and

vice-versa.

Operation

[m] ¬ [m]

Affected flag(s)

TC2 TC1

¾Ö¾

HT49R50

October 22, 1999

HT49R50 Scheda tecnica(PDF) 38 Page - Holtek Semiconductor Inc

HT49R50 Scheda tecnica(HTML) 38 Page - Holtek Semiconductor Inc

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