SN8F27E64KB datasheet(29/192 Pages) SONIX

Part #	SN8F27E64KB

Description	8-Bit Flash Micro-Controller with Embedded ICE and ISP

PDF	192 Pages

Scroll/Zoom	100%

Manufacturer	SONIX [SONiX Technology Company]

Direct Link	http://www.sonix.com.tw

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29 / 192 page

SN8F27E60 Series

8-Bit Flash Micro-Controller with Embedded ICE and ISP

SONiX TECHNOLOGY CO., LTD

Page 29

Version 1.4

2.2.2 ACCUMULATOR

The ACC is an 8-bit data register responsible for transferring or manipulating data between ALU and data memory. If

the result of operating is zero (Z) or there is carry (C or DC) occurrence, then these flags will be set to PFLAG register.

ACC is not in data memory (RAM), so ACC can’t be access by “B0MOV” instruction during the instant addressing

mode.



Example: Read and write ACC value.

; Read ACC data and store in BUF data memory

MOV

BUF, A

; Write a immediate data into ACC

MOV

A, #0FH

; Write ACC data from BUF data memory

MOV

A, BUF

The system will store ACC and working registers (0x80-0x8F) by hardware automatically when interrupt executed.



Example: Protect ACC and working registers.

.CODE

INT_SERVICE:

; Save ACC to buffer.

; Save working registers to buffer.

…

; Load working registers form buffers.

; Load ACC form buffer.

RETI

; Exit interrupt service vector

SN8F27E64KB Datasheet(PDF) 29 Page - SONiX Technology Company