HT48R50A datasheet(41/46 Pages) HOLTEK

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SDZA [m]

Decrement data memory and place result in ACC, skip if 0

Description

The contents of the specified data memory are decremented by 1. If the result

is 0, the next instruction is skipped. The result is stored in the accumulator

but the data memory remains unchanged. If the result is 0, the following in-

struction, fetched during the current instruction execution, is discarded and

a dummy cycle is replaced to get the proper instruction (2 cycles). Otherwise

proceed with the next instruction (1 cycle).

Operation

Skip if ([m]-1)=0, ACC ¬ ([m]-1)

Affected flag(s)

TC2 TC1

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SET [m]

Set data memory

Description

Each bit of the specified data memory is set to 1.

Operation

[m] ¬ FFH

Affected flag(s)

TC2 TC1

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SET [m].i

Set bit of data memory

Description

Bit "i" of the specified data memory is set to 1.

Operation

[m].i ¬ 1

Affected flag(s)

TC2 TC1

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SIZ [m]

Skip if increment data memory is 0

Description

The contents of the specified data memory are incremented by 1. If the result

is 0, the following instruction, fetched during the current instruction execu-

tion, is discarded and a dummy cycle is replaced to get the proper instruction

(2 cycles). Otherwise proceed with the next instruction (1 cycle).

Operation

Skip if ([m]+1)=0, [m] ¬ ([m]+1)

Affected flag(s)

TC2 TC1

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HT48R50A-1

Rev. 1.10

July 2, 2001

HT48R50A Scheda tecnica(PDF) 41 Page - Holtek Semiconductor Inc

HT48R50A Scheda tecnica(HTML) 41 Page - Holtek Semiconductor Inc

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