HT49C50 datasheet(48/52 Pages) HOLTEK

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SNZ [m].i

Skip if bit ²i² of the data memory is not zero

Description

If bit ²i² of the specified data memory is not zero, the next instruction is

skipped. If bit ²i² of the data memory is not 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].i¹0

Affected flag(s)

TC2 TC1

¾¾¾¾¾¾

SUB A,[m]

Subtract data memory from the accumulator

Description

The specified data memory is subtracted from the contents of the accumula-

tor, leaving the result in the accumulator.

Operation

ACC ¬ ACC+[m]+1

Affected flag(s)

TC2 TC1

ÖÖÖÖ

SUBM A,[m]

Subtract data memory from the accumulator

Description

The specified data memory is subtracted from the contents of the accumula-

tor, leaving the result in the data memory.

Operation

[m] ¬ ACC+[m]+1

Affected flag(s)

TC2 TC1

ÖÖÖÖ

SUB A,x

Subtract immediate data from the accumulator

Description

The immediate data specified by the code is subtracted from the contents of

the accumulator, leaving the result in the accumulator.

Operation

ACC ¬ ACC+x+1

Affected flag(s)

TC2 TC1

ÖÖÖÖ

HT49C50

August 18, 1999

HT49C50 Scheda tecnica(PDF) 48 Page - Holtek Semiconductor Inc

HT49C50 Scheda tecnica(HTML) 48 Page - Holtek Semiconductor Inc

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