HT46C22 datasheet(40/46 Pages) HOLTEK

40 / 46 page

SZ [m]

Skip if data memory is 0

Description

If the contents of the specified data memory are 0, the following instruction, fetched during the

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

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

Operation

Skip if [m]=0

Affected flag(s)

TC2

TC1

¾¾¾¾¾¾

SZA [m]

Move data memory to ACC, skip if 0

Description

The contents of the specified data memory are copied to the accumulator. If the contents is 0,

the following instruction, 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]=0

Affected flag(s)

TC2

TC1

¾¾¾¾¾¾

SZ [m].i

Skip if bit i of the data memory is 0

Description

If bit i of the specified data memory is 0, the following instruction, fetched during the current in-

struction 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].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 transferred to TBLH directly.

Operation

[m]

¬ ROM code (low byte)

TBLH

¬ ROM code (high byte)

Affected flag(s)

TC2

TC1

¾¾¾¾¾¾

TABRDL [m]

Move the 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

¾¾¾¾¾¾

HT46R22/HT46C22

Rev. 1.10

October 2, 2002

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