- 您現在的位置：買賣IC網 > PDF目錄363894 > W742C813 (WINBOND ELECTRONICS CORP) 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER PDF資料下載
參數資料
| 型號： | W742C813 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| 中文描述： | 4-BIT, MROM, 3.58 MHz, MICROCONTROLLER, PQFP100 |
| 封裝： | 14 X 20 MM, 2.75 MM HEIGHT, QFP-100 |
| 文件頁數： | 9/56頁 |
| 文件大小： | 455K |
| 代理商： | W742C813 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁當前第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁
W742E/C813
Publication Release Date: December 2000
- 9 -
Revision A1
5.3 Program Memory (ROM)
The read-only memory (ROM) is used to store program codes or the look-up table that can be
arranged up to 65536(64K)
×
4 bits. The program ROM is divided into sixteen pages; the size of each
page is 2048(2K)
×
16 bits. So the total ROM size is 32768(32K)
×
16 bits. Before the jump or
subroutine call instructions are to be executed, the destination ROM page register (ROMPR) must be
determined firstly. The ROM page can be selected by executing the
MOV ROMPR, #I
or
MOV
ROMPR,RAM
instructions. But the branch decision instructions (e.g. JB0, SKB0, JZ, JC, ...) must jump
into the same ROM page.
The look-up table area is allocated in lower half part of ROM (PC:
4000H to 7FFFH).
Each look-up table element is composed of 4 bits, so the look-up table can be
addressed up to 65536(64K) elements. It uses instructions
MOV TAB0,R MOV TAB1,R MOV
TAB2,R MOV TAB3,R
to determine the look-up table element address. The look-up table address is
4 times PC counter, and the offset value is 4000H. Instruction
MOVC R
is used to read the look-up
table content and save data into the RAM. The organization of the program memory is shown in Figure
5-1.
0000H
16 bits
16384 * 16 bits
0FFFH
1000H
0800H
:
07FFH
:
1FFFH
2000H
1800H
:
17FFH
:
2FFFH
3000H
2800H
:
27FFH
:
3800H
:
37FFH
:
3FFFH
All Program memory can be used to store instruction code,
but the look-up table just can be stored in the lower half ROM (4000H~7FFFH).
Page 0
Page 1
Page 2
Page 3
Page 4
Page 5
Page 6
Page 7
4000H
16 bits
16384 * 16 bits
4FFFH
5000H
4800H
:
:
Each element (4 bits)
of the look-up table
:
47FFH
:
5FFFH
6000H
5800H
:
:
:
57FFH
:
6FFFH
7000H
6800H
:
:
:
67FFH
:
7800H
:
:
77FFH
:
7FFFH
:
Page 8
Page 9
Page A
Page B
Page C
Page D
Page E
Page F
Figure 5-1 Program Memory Organization
相關PDF資料 |
PDF描述 |
|---|---|
| W742C814 | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| W742E813 | 4-BIT MICROCONTROLLER |
| W742C81A | 4-BIT MICROCONTROLLER |
| W742S819 | 4-BIT TELEPHONE CONTROLLER |
| W742S81A | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
相關代理商/技術參數 |
參數描述 |
|---|---|
| W742C814 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4 BIT MICROCONTROLLER |
| W742C816 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller |
| W742C818 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller |
| W742C81A | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER |
| W742CE811 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER |
發布緊急采購，3分鐘左右您將得到回復。