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參數(shù)資料
| 型號： | SC9200 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | DTMF GENERATORS |
| 中文描述： | 雙音多頻發(fā)電機 |
| 文件頁數(shù)： | 6/9頁 |
| 文件大?。?/td> | 124K |
| 代理商： | SC9200 |
Silan
Semiconductors
SC9200A/B
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0
2001.02.02
6
Digit 1
DTMF signal
1
1
1
1
1
Digit2
DTMF signal
LSB
MSB
LSB
MSB
MSB
LSB
Digit 1
Digit 2
Stop code
t
UP
X2
(Oscillator)
CLK
DATA
CE
DTMF
S/P
Figure 1
2. Parallel mode
(SC9200B)
The SC9200B provides four data inputs D0~D3 to generate their corresponding DTMF signals. The
/P
S
has
to be connected high to select the parallel operation mode. Then the input data codes should be determined.
Finally, the
CE
is connected low to transmit the DTMF signal from the DTMF pin.
The TDE time (about 6ms) will be delayed from the
CE
falling edge to the DTMF signal output.
The relationship between the digital codes and the tone output frequency is illustrated in Table 2. As for the
control timing diagram, see figure 2.
When the system is operating in the parallel mode, D0~D3 are all in the floating state. Thus, these data input
pins should not float.
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