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參數(shù)資料
型號: W741C260
廠商: WINBOND ELECTRONICS CORP
元件分類: 微控制器/微處理器
英文描述: 4-BIT Microcontroller(多次可編程4位的微控制器)
中文描述: 4-BIT, MROM, 4.19 MHz, MICROCONTROLLER, PQFP80
封裝: QFP-80
文件頁數(shù): 7/92頁
文件大?。?/td> 488K
代理商: W741C260
W741C260
Publication Release Date: March 1998
- 7 -
Revision A3
3 2 1 0
7FFH
600H
2048
address
000H
16 bits
2048 x 16-bit
ACC
x x y y
TABL
x x x x
TABH
- x x x
ROM address = 600H + Offset/4
Offset
0 1 1 x x x x x
x x x x
Each element (4 bits) of the look-up table
This area can be used to store both instruction code
and look-up table
Figure 1. Program Memory Organization
Data Memory (RAM)
1. Architecture
The static data memory (RAM) used to store data is arranged as 128
×
4 bits. The data memory can
be addressed directly or indirectly. The organization of the data memory is shown in Figure 2.
Working Register
128
address
00H
:
0FH
4 bits
128 x 4-bit
7FH
Figure 2. Data Memory Organization
The first sixteen addresses (00H to 0FH) in the data memory are known as the working registers
(WR). The other data memory is used as general memory and cannot operate directly with immediate
data. The relationship between data memory locations and the page register (PAGE) in indirect
addressing mode is described in the next section.
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