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參數(shù)資料
型號(hào)： W921E840
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位的微控制器)
中文描述： 4-BIT, EEPROM, 4 MHz, MICROCONTROLLER, PDIP40
封裝： DIP-40
文件頁(yè)數(shù)： 24/64頁(yè)
文件大小： 603K
代理商： W921E840
W921E840
- 24 -
Normally the SCLK1 or SCLK2 pin will remain in high state and the serial data will be latched at the
rising edge of the SCLK1 or SCLK2 signal, but the serial clock inverter control register (SRINV) will
invert the above function. In this case SCLK1 or SCLK2 pin will remain in low state and the serial
data will be latched at the falling edge of the SCLK1 or SCLK2 signal.
The transmitting serial clock can come from SCLK1 or SCLK2, depending on which one is enable. If
the serial function is disabled, it will cause the relative pins to be high impendance and it will not
affect the contents of serial buffer registers (start at address 050H).
6.7 DTMF Generator
There is one dual tone multi-frequency (DTMF) generator channel in this chip. The correct DTMF
output frequency is decided by the OSCCTR register as shown below:
OSCCTR register: (address = 013H, default data = 0H)
b3
b2
b1
b0
Reserved
b2
b1
b0
0
0
0
0
1
1
0
0
1
1
0
0
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 register; the functions are described in the following table:
DTMF register: (address = 014H, default data = 0H)
b3
b2
b1
b0
b3 b2 b1 b0
X X 0 0
X X 0 1
X X 1 0
X X 1 1
0 0 X X
0 1 X X
1 0 X X
1 1 X X
Function Description
Column 1 (1209 Hz) output
Column 2 (1336 Hz) output
Column 3 (1477 Hz) output
Column 4 (1633 Hz) output
Row 1 (697 Hz) output
Row 2 (770 Hz) output
Row 3 (852 Hz) output
Row 4 (941 Hz) output
Note: X
don't care
The output frequency of the row and column will be controlled by the row/column frequency control
register (RCCTL).
相關(guān)PDF資料
PDF描述
W921E880 4-Bit Microcontroller(4位的微控制器)
W921F840 4-Bit Microcontroller(4位的微控制器)
W9310 Direct Sequence Spread Spectrum Transceiver(直接序列擴(kuò)展頻譜收發(fā)器)
W9320 ADPCM Codec(ADPCM編解碼器)
W9321 ADPCM Codec(ADPCM編解碼器)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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
W921E880 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER
W921E880A 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER
W925C240 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telephone Controller
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