- 您現在的位置：買賣IC網 > PDF目錄363901 > W79E804A (WINBOND ELECTRONICS CORP) 8-BIT MICROCONTROLLER PDF資料下載
參數資料
| 型號： | W79E804A |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 8位微控制器 |
| 英文描述： | 8-BIT MICROCONTROLLER |
| 中文描述： | 8位微控制器 |
| 文件頁數： | 10/115頁 |
| 文件大小： | 1456K |
| 代理商： | W79E804A |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁當前第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頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁
W79E804A/803A/802A
- 10 -
6.6 Data Pointers
The data pointers of W79E804 series are same as 8052 that has dual 16-bit Data Pointers (DPTR) by
setting DPS bit at AUXR1.0. The figure of dual DPTR is as below diagram.
DPTR
DPTR1
DPS
AUXR1.0
DPS=0
DPS=1
Figure
6-1: Dual DPTR
6.7 Architecture
The W79E804 series are based on the standard 8052 device. It is built around an 8-bit ALU that uses
internal registers for temporary storage and control of the peripheral devices. It can execute the
standard 8052 instruction set.
6.7.1 ALU
The ALU is the heart of the W79E804 series. It is responsible for the arithmetic and logical functions. It
is also used in decision making, in case of jump instructions, and is also used in calculating jump
addresses. The user cannot directly use the ALU, but the Instruction Decoder reads the op-code,
decodes it, and sequences the data through the ALU and its associated registers to generate the
required result. The ALU mainly uses the ACC which is a special function register (SFR) on the chip.
Another SFR, namely B register is also used in Multiply and Divide instructions. The ALU generates
several status signals which are stored in the Program Status Word register (PSW).
6.7.2 Accumulator
The Accumulator (ACC) is the primary register used in arithmetic, logical and data transfer operations
in the W79E804 series. Since the Accumulator is directly accessible by the CPU, most of the high
speed instructions make use of the ACC as one argument.
6.7.3 B Register
This is an 8-bit register that is used as the second argument in the MUL and DIV instructions. For all
other instructions it can be used simply as a general purpose register.
6.7.4 Program Status Word:
This is an 8-bit SFR that is used to store the status bits of the ALU. It holds the Carry flag, the Auxiliary
Carry flag, General purpose flags, the Register Bank Select, the Overflow flag, and the Parity flag.
相關PDF資料 |
PDF描述 |
|---|---|
| W79E804ADG | 8-BIT MICROCONTROLLER |
| W79E804ASG | 8-BIT MICROCONTROLLER |
| W80NF06 | N-CHANNEL 60V - 0.0065OHM - 80A TO-220/D2PAK/TO-247 STripFET II POWER MOSFET |
| W81181AD | USB HUB CONTROLLER |
| W81181D | USB HUB CONTROLLER |
相關代理商/技術參數 |
參數描述 |
|---|---|
| W79E804ADG | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
| W79E804ASG | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
| W79E8213 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:W79E8213中文資料 |
| W79E8213_W79E8213R | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Table of contents- |
| W79E8213AKG | 制造商:Nuvoton Technology Corp 功能描述:IC MCU 8BIT 4K FLASH 20DIP |
發布緊急采購，3分鐘左右您將得到回復。