- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄361790 > W741C250 4-Bit Microcontroller PDF資料下載
參數(shù)資料
| 型號： | W741C250 |
| 英文描述： | 4-Bit Microcontroller |
| 中文描述： | 4位微控制器 |
| 文件頁數(shù)： | 8/88頁 |
| 文件大?。?/td> | 449K |
| 代理商： | W741C250 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁當(dāng)前第8頁第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
W741C250
- 8 -
2. Page Register (PAGE)
The page register is organized as a 4-bit binary register. The bit descriptions are as follows:
R/W
R/W
R/W
0
1
2
3
_
PAGE
Note: R/W means read/write available.
Bit 3 is reserved.
Bit 2, Bit 1, Bit 0 are indirect addressing mode preselect bits:
000 = Page 0 (00H
0FH)
010 = Page 2 (20H
2FH)
100 = Page 4 (40H
4FH)
110 = Page 6 (60H
6FH)
001 = Page 1 (10H
1FH)
011 = Page 3 (30H
3FH)
101 = Page 5 (50H
5FH)
111 = Page 7 (70H
7FH)
Accumulator (ACC)
The accumulator (ACC) is a 4-bit register used to hold results from the ALU and transfer data
between the memory, I/O ports, and registers.
Arithmetic and Logic Unit (ALU)
This is a circuit which performs arithmetic and logic operations. The ALU provides the following
functions:
Logic operations: ANL, XRL, ORL
Branch decisions: JB0, JB1, JB2, JB3, JNZ, JZ, JC, JNC, DSKZ, DSKNZ, SKB0, SKB1, SKB2,
SKB3
Shift operations: SHRC, RRC, SHLC, RLC
Binary additions/subtractions: ADC, SBC, ADD, SUB, ADU, DEC, INC
After any of the above instructions are executed, the status of the carry flag (CF) and zero flag (ZF) is
stored in the internal registers. CF can be read out by executing MOVA R, CF.
Clock Generator
The W741C250 provides a crystal or RC oscillation circuit selected by option codes to generate the
system clock through external connections. If a crystal oscillator is used, a crystal or a ceramic
resonator must be connected to XIN and XOUT, and the capacitor must be connected if an accurate
frequency is needed. When a crystal oscillator is used, a high-frequency clock (400 KHz to 4 MHz) or
low-frequency clock (32 KHz) can be selected for the system clock by means of option codes. If the
RC oscillator is used, a resistor in the range of 20 K
to 1.6 M
must be connected to XIN and
XOUT, as shown in Figure 3. The system clock frequency range is from 32 KHz to 4 MHz. One
machine cycle consists of a four-phase system clock sequence and can run up to 1
μ
S with a 4 MHz
system clock.
XIN
XOUT
XIN
XOUT
or
Crystal
Resistor
32 KHz or
400K to 4MHz
Figure 3. Oscillator Configuration
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| W741E200 | 4-Bit Microcontroller |
| W742C(E)811 | 4-BIT MICROCONTROLLER |
| W742C816 | Microcontroller |
| W742C818 | Microcontroller |
| W742E816 | Microcontroller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| W741C260 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER |
| W741E200 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller |
| W741E201 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT FLASH MICROCONTROLLER |
| W741E202 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT FLASH MICROCONTROLLER |
| W741E203 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT FLASH MICROCONTROLLER |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。