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參數(shù)資料
| 型號： | W742C81A |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT MICROCONTROLLER |
| 中文描述： | 4-BIT, FLASH, MICROCONTROLLER, UUC100 |
| 封裝： | DIE-100 |
| 文件頁數(shù)： | 29/45頁 |
| 文件大小： | 567K |
| 代理商： | W742C81A |
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Preliminary W742E81A/W742C81A
Publication Release Date: April 2000
Revision A1
- 29 -
Bit 0 = 1 Signal change at RC.0
Bit 1 = 1 Signal change at RC.1
Bit 2 = 1 Signal change at RC.2
Bit 3 = 1 Signal change at RC.3
6.19 Output Port RE & RF
Output port RE is used as an output of the internal RT port. When the MOV RE, R instruction is
executed, the data in the RAM will be output to port RT through port RE. It provides a high sink
current to drive an LED. RF port is just used as a output port. When the MOV RF, R instruction is
executed, the data in the RAM will be output to RF.
6.20 DTMF Output Pin (DTMF)
This pin should output the dual tone multi-frequency signal from the DTMF generator. There is the
DTMF register that can specify the wanted low/high frequency. And control whether the dual tone will
be output or not. The tones are divided into two groups (Row group and Col group) and one tone from
each group is selected to represent a digit. The relation between the DTMF signal and the
corresponding touch tone keypad is shown in Figure 6-13.
Row/Col
Frequency
R1
697 Hz
R2
770 Hz
R3
852 Hz
R4
941 Hz
C1
1209 Hz
C2
1336 Hz
C3
1477 Hz
C4
1633 Hz
Figure 6-13 The relation between the touch tone keypad and the frequency
6.20.1 DTMF register
DTMF register is organized as 4-bit binary register. By controlling the DTMF register, one tone of the
low/high group can be selected. The MOV DTMF,R instruction can specify the wanted tones. The bit
descriptions are as follows:
Note: W means write only.
W
W
W
W
0
1
2
3
DTMF
1
2
3
A
4
5
6
B
7
8
9
C
*
0
#
D
R1
R2
R3
R4
C1
C2
C3
C4
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| W742S819 | 4-BIT TELEPHONE CONTROLLER |
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| W742S82A | 4-BIT TELEPHONE CONTROLLER |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| W742CE811 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER |
| W742E | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4 BIT MICROCONTROLLER |
| W742E/C811 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4 BIT MICROCONTROLLER |
| W742E811 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| W742E813 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER |
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