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參數(shù)資料
型號: W921E843A
廠商: WINBOND ELECTRONICS CORP
元件分類: 微控制器/微處理器
英文描述: 4-BIT MICROCONTROLLER
中文描述: 4-BIT, OTPROM, 4 MHz, MICROCONTROLLER, PDIP40
封裝: DIP-40
文件頁數(shù): 47/58頁
文件大小: 449K
代理商: W921E843A
W921E840A/W921C840
Publication Release Date: July 1999
- 47 - Revision A3
9. ADDRESSING MODE
There are ROM, RAM, and Look-up table addressing modes in this chip.
9.1 ROM Addressing Mode
There are two types of ROM addressing mode in this chip:
Indirect call addressing mode (0000H to 0FFFH)
Long call/jump addressing mode (0000H to 1FFFH)
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
b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
decoder code
b3 b2 b1 b0
i3 i2 i1 i0
B Register
A Register
0
i3 i2 i1 i0 b3 b2 b1 b0 a3 a2 a1 a0
ROM CODE
PC
Instruction: CALLP
9.1.2 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
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(guān)PDF資料
PDF描述
W921C880 4-Bit Microcontroller(4位微控制器)
W921E880A 4-Bit Microcontroller(4位微控制器)
W921E840 4-Bit Microcontroller(4位的微控制器)
W921E880 4-Bit Microcontroller(4位的微控制器)
W921F840 4-Bit Microcontroller(4位的微控制器)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
W921E880 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER
W921E880A 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER
W925C240 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telephone Controller
W925C625 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-bit CID MICROCONTROLLER
W925E240 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telephone Controller