SN8P1602A datasheet(32/76 Pages) SONIX

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SN8P1602B

8-Bit Micro-Controller

SONiX TECHNOLOGY CO., LTD

Page 32

Version 1.1

4 ADDRESSING MODE

OVERVIEW

The SN8P1602B provides three addressing modes to access RAM data, including immediate addressing mode,

directly addressing mode and indirectly address mode.

IMMEDIATE ADDRESSING MODE

The immediate addressing mode uses an immediate data to set up the location (“ MOV

A, # I ”, “ B0MOV

M, # I “) in

ACC or specific RAM.

Immediate addressing mode

MOV

A, #12H

; To set an immediate data 12H into ACC

DIRECTLY ADDRESSING MODE

The directly addressing mode moves the content of RAM location in or out of ACC.(“ MOV

A,12H ”, “ MOV

12H,

A ”).

Directly addressing mode

B0MOV

A, 12H

; To get a content of location 12H of bank 0 and save in ACC

INDIRECTLY ADDRESSING MODE

The indirectly addressing mode is to access the memory by the data pointer registers (Y/Z).

Example: Indirectly addressing mode with @YZ register

CLR

; To clear Y register to access RAM bank 0.

B0MOV

Z, #12H

; To set an immediate data 12H into Z register.

B0MOV

A, @YZ

; Use data pointer @YZ reads a data from RAM location

; 012H into ACC.

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