HT49C50 datasheet(37/52 Pages) HOLTEK

37 / 52 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

PC ¬ addr

Affected flag(s)

TC2 TC1

¾¾¾¾¾¾

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

¾¾¾¾¾¾

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

¾¾¾¾¾¾

CLR WDT

Clear watchdog timer

Description

The WDT is cleared (re-counting from zero). The power down bit (PD) and

time-out bit (TO) are cleared.

Operation

WDT ¬ 00H

PD and TO ¬ 0

Affected flag(s)

TC2 TC1

¾¾

¾¾¾¾

HT49C50

August 18, 1999

HT49C50 Datasheet(PDF) 37 Page - Holtek Semiconductor Inc

HT49C50 Datasheet(HTML) 37 Page - Holtek Semiconductor Inc

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