HT9480 datasheet(56/57 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 instruc-

tion 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

–

––

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 instruction. Otherwise

proceed with the next instruction.

Operation

Skip if [m].i=0

Affected flag(s)

TC2

TC1

–

––

TABRDC [m]

Move 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 transferred

to TBLH directly.

Operation

[m]

← ROM code (low byte)

TBLH

← ROM code (high byte)

Affected flag(s)

TC2

TC1

–

––

TABRDL [m]

Move ROM code (last page) to TBLH and data memory

Description

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

is moved to the data memory and the high byte transferred to TBLH directly.

Operation

[m]

← ROM code (low byte)

TBLH

← ROM code (high byte)

Affected flag(s)

TC2

TC1

–

––

HT9480

23th Feb ’98

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