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參數(shù)資料
型號: W921C880
廠商: WINBOND ELECTRONICS CORP
元件分類: 微控制器/微處理器
英文描述: 4-Bit Microcontroller(4位微控制器)
中文描述: 4-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP80
封裝: QFP-80
文件頁數(shù): 41/57頁
文件大小: 372K
代理商: W921C880
W921E880A/W921C880
Publication Release Date: September 1998
- 41 -
Revision A2
Direct Addressing Mode (2 Words/2 Cycles)
b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
decoder code
ROM CODE
RAM ADDRESS
Instruction: MOV A, Mx; MOV B, Mx; MOV Mx, A; MOV Mx, B; ..., etc.
Indirect Addressing Mode (1 Word/1 Cycle)
b1 b0
b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
b3 b2 b1 b0
b3 b2 b1 b0
U
Register
V
Register
W
Register
RAM ADDRESS
Instruction: MOV A, @M; MOV B, @M; MOV @M, A; ..., etc.
Working REG Addressing Mode (1 Word/1 Cycle)
b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
decoder code
0 0 0 1 0 0 m3 m2 m1 m0
ROM CODE
RAM ADDRESS
Instruction: MOV A, WRn; MOV WRn, A; ..., etc.
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