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參數(shù)資料
型號: W921E840
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位的微控制器)
中文描述: 4-BIT, EEPROM, 4 MHz, MICROCONTROLLER, PDIP40
封裝: DIP-40
文件頁數(shù): 52/64頁
文件大?。?/td> 603K
代理商: W921E840
W921E840
- 52 -
10.1.3 Long Call/Jump 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
b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
decoder code
ROM CODE
PC
Instruction: CALL, JMPL, JB0, JB1, JB2, JB3, JC, JNC, JZ, JNZ
10.2 RAM Addressing Mode
There are three types of RAM addressing mode in this chip:
ù
Direct addressing mode
ù
Indirect addressing mode
ù
Working register addressing mode
10.2.1 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.
10.2.2 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.
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