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SN8F2280 参数 Datasheet PDF下载

SN8F2280图片预览
型号: SN8F2280
PDF下载: 下载PDF文件 查看货源
内容描述: 8位微控制器 [8-Bit Micro-Controller]
分类和应用: 微控制器
文件页数/大小: 163 页 / 3660 K
品牌: SONIX [ SONIX TECHNOLOGY COMPANY ]
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SN8F2280 Series  
USB 2.0 Full-Speed 8-Bit Micro-Controller  
2.1.4.4 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.  
¾
Example: Read and write ACC value.  
; Read ACC data and store in BUF data memory.  
MOV  
; Write a immediate data into ACC.  
MOV  
BUF, A  
A, #0FH  
; Write ACC data from BUF data memory.  
MOV  
A, BUF  
A, BUF  
; or  
B0MOV  
The system doesn’t store ACC and PFLAG value when interrupt executed. ACC and PFLAG data must be saved to  
other data memories. “PUSH”, “POP” save and load ACC, PFLAG data into buffers.  
¾
Example: Protect ACC and working registers.  
INT_SERVICE:  
PUSH  
; Save ACC and PFLAG to buffers.  
.
POP  
; Load ACC and PFLAG from buffers.  
RETI  
; Exit interrupt service vector  
SONiX TECHNOLOGY CO., LTD  
Page 31  
Version 1.1  
 
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