HT47C20 datasheet(54/56 Pages) HOLTEK

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SZA [m]

Move data memory to ACC, skip if zero

Description

The contents of the specified data memory is copied to accumulator. If the

contents is zero, the following instruction, fetched during the current in-

struction execution, is discarded and a dummy cycle is replaced to get the

proper instruction. This is a 2-cycle instruction. Otherwise proceed with

the next instruction.

Operation

Skip if [m]=0, ACC¬ [m]

Affected flag(s)

TC2 TC1 TO

¾¾¾¾¾

SZ [m].i

Skip if bit i of the data memory is zero

Description

If bit i of the specified data memory is zero, the following instruction,

fetched during the current instruction execution, is discarded and a

dummy cycle is replaced to get the proper instruction. This is a 2-cycle in-

struction. Otherwise proceed with the next instruction.

Operation

Skip if [m].i=0

Affected flag(s)

TC2 TC1

¾¾¾¾¾¾

TABRDC [m]

Move the ROM code (current page) to TBLH and data memory

Description

The low byte of ROM code (current page) addressed by the table pointer

(TBLP) is moved to the specified data memory and the high byte trans-

ferred to TBLH directly.

Operation

[m] ¬ ROM code (low byte)

TBLH ¬ ROM code (high byte)

Affected flag(s)

TC2 TC1

¾¾¾¾¾¾

HT47C20

January 18, 2000

HT47C20 Datasheet(PDF) 54 Page - Holtek Semiconductor Inc