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參數(shù)資料
| 型號： | W921C880 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-Bit Microcontroller(4位微控制器) |
| 中文描述： | 4-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP80 |
| 封裝： | QFP-80 |
| 文件頁數(shù)： | 21/57頁 |
| 文件大小： | 372K |
| 代理商： | W921C880 |
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W921E880A/W921C880
Publication Release Date: September 1998
- 21 -
Revision A2
The internal serial clock can be controlled by the serial clock speed control register (SRSPC) is
described as follows:
SRSPC register: (address = 00BH, default data = 0H)
b3
b2
b1
b0
b1 b0
Input frequency
Reserved
0
0
0
1
1
0
1
1
fsys/4 Hz
fsys/8 Hz
fsys/16 Hz
b3 b2
0
0
0
0
0
0
0
0
0
1
0
1
0
1
0
1
1
0
0
0
0
1
1
0
1
1
1
1
0
0
0
0
0
1
1
0
fsys/32 Hz
fsys/64 Hz
fsys/128 Hz
fsys/256 Hz
fsys/512 Hz
fsys/1024 Hz
fsys/2048 Hz
Normally the WCLK or RCLK pin will remain in a high state and the serial data will be latched at the
rising edge of the WCLK or RCLK signal, but the serial clock inverter control register (SRINV) will
invert the above function. In this case the WCLK or RCLK pin will remain in a low state and the serial
data will be latched at the falling edge of the the WCLK or RCLK signal.
The transmitting serial clock can come from WCLK or RCLK depending upon which one is enabled. If
the serial function is disabled, it will cause the relative pins to be in a high impedance state and it will
not affect the contents of the serial buffer registers (start at address 050H).
6.7 DTMF Generator
One channel of the dual tone multi-frequency (DTMF) generator is in this chip. The exact frequency
must be decided by the OSCCTR REG to get the exact DTMF generator.
OSCCTR REG: (ADDRESS = 013H)
(Default data = 0H)
b3
b2
b1
b0
Reserved.
b2
0
0
0
0
1
1
b1
0
0
1
1
0
0
b0
0
1
0
1
0
1
Osc. Selection
400 KHz
800 KHz
2 MHz
4 MHz
Reserved
3.58MHz
There are four bits in the DTMF REG; the function is described in the following table
相關PDF資料 |
PDF描述 |
|---|---|
| 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) |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| W921E400 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER |
| W921E400A | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER |
| W921E840 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER |
| W921E840A | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER |
| W921E843A | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER |
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