HT49C50 datasheet(47/52 Pages) HOLTEK

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SET [m]

Set data memory

Description

Each bit of the specified data memory is set to one.

Operation

[m] ¬ FFH

Affected flag(s)

TC2 TC1

¾¾¾¾¾¾

SET [m].i

Set bit of data memory

Description

Bit ²i² of the specified data memory is set to one.

Operation

[m].i ¬ 1

Affected flag(s)

TC2 TC1

¾¾¾¾¾¾

SIZ [m]

Skip if increment data memory is zero

Description

The contents of the specified data memory are incremented by one. If the re-

sult is zero, the following instruction, fetched during the current instruction

execution, is discarded and a dummy cycle is replaced to get the proper in-

struction (two cycles). Otherwise proceed with the next instruction (one cy-

cle).

Operation

Skip if ([m]+1)=0, [m] ¬ ([m]+1)

Affected flag(s)

TC2 TC1

¾¾¾¾¾¾

SIZA [m]

Increment data memory and place result in ACC, skip if zero

Description

The contents of the specified data memory are incremented by one. If the re-

sult is zero, the next instruction is skipped and the result is stored in the ac-

cumulator. The data memory remains unchanged. If the result is zero, the

following instruction, fetched during the current instruction execution, is

discarded and a dummy cycle is replaced to get the proper instruction (two

cycles). Otherwise proceed with the next instruction (one cycle).

Operation

Skip if ([m]+1)=0, ACC ¬ ([m]+1)

Affected flag(s)

TC2 TC1

¾¾¾¾¾¾

HT49C50

August 18, 1999

HT49C50 Datasheet(PDF) 47 Page - Holtek Semiconductor Inc

HT49C50 Datasheet(HTML) 47 Page - Holtek Semiconductor Inc

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