HT9480 datasheet(43/57 Pages) HOLTEK

43 / 57 page

CALL addr

Subroutine call

Description

The instruction unconditionally calls a subroutine located at the indicated

address. The program counter increments once to obtain the address of the

next instruction, and pushes this onto the stack. The indicated address is

then loaded. Program execution continues with the instruction at this ad-

dress.

Operation

Stack

← PC+1

← addr

Affected flag(s)

TC2

TC1

–

––

CLR [m]

Clear data memory

Description

The contents of the specified data memory are cleared to zero.

Operation

[m]

← 00H

Affected flag(s)

TC2

TC1

–

––

CLR [m].i

Clear bit of data memory

Description

The bit i of the specified data memory is cleared to zero.

Operation

[m].i

← 0

Affected flag(s)

TC2

TC1

–

––

CLR WDT

Clear Watchdog timer

Description

The WDT and the WDT Prescaler are cleared (re-counting from zero). The

powerdown bit (PD) and time-out bit (TO) are cleared.

Operation

WDT and WDT Prescaler

← 00H

PD and TO

← 0

Affected flag(s)

TC2

TC1

–

––

HT9480

23th Feb ’98

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