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參數資料
型號: W921C400
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, MROM, 4 MHz, MICROCONTROLLER, PDIP28
封裝: DIP-28
文件頁數: 42/53頁
文件大?。?/td> 399K
代理商: W921C400
W921E400A/W921C400
- 42 -
9. ADDRESSING MODE
There are ROM, RAM, and Look-up table addressing modes in this chip.
9.1 ROM Addressing Mode
There are three types of ROM addressing mode in this chip:
Indirect call addressing mode (0000H to 0FFFH )
Long call/jump addressing mode (0000H to 0FFFH )
9.1.1 Indirect Call Addressing Mode: (1 word/2 cycles)
b3 b2 b1 b0
b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
PC
decoder code
b3 b2 b1 b0
i3 i2 i1 i0
B Register
A Register
i3 i2 i1 i0 b3 b2 b1 b0 a3 a2 a1 a0
ROM CODE
9.1.2 Long Call/Jump Addressing Mode: (2 words/2 cycles)
Instruction: CALLP
b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
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
9.2 RAM Addressing Mode
There are three types of RAM addressing mode in this chip:
Direct addressing mode
Indirect addressing mode
Working register addressing mode
相關PDF資料
PDF描述
W921C840 4-Bit Microcontroller(4位微控制器)
W921E840A 4-Bit Microcontroller(4位微控制器)
W921E843A 4-BIT MICROCONTROLLER
W921C880 4-Bit Microcontroller(4位微控制器)
W921E880A 4-Bit Microcontroller(4位微控制器)
相關代理商/技術參數
參數描述
W921C840 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller
W921C880 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller
W921E400 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER
W921E400A 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER
W921E840 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER