SC9200AS SILAN [Silan Microelectronics Joint-stock], SC9200AS Datasheet - Page 5

• Manufacturer Part Number: SC9200AS
• Description: DTMF GENERATOR WITH MICROPROCESSOR
• Manufacturer: SILAN [Silan Microelectronics Joint-stock]

2. Parallel mode (SC9200B/BS)
Table 2: Digits vs. input data vs. tone output frequency (parallel mode)
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
has to be connected high to select the parallel operation mode. Then the input data codes should be
determined. Finally, the
control timing diagram, see Fiigure 2.
input pins should not float.
The SC9200B/BS provides four data inputs D0~D3 to generate their corresponding DTMF signals. The
The TDE time (about 6ms) will be delayed from the
The relationship between the digital codes and the tone output frequency is illustrated in Table 2. As for the
When the system is operating in the parallel mode, D0~D3 are all in the floating state. Thus, these data
Digit
C
D
A
B
1
2
3
4
5
6
7
8
9
0
#
*
D3
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
CE
is connected low to transmit the DTMF signal from the DTMF pin.
D2
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
Figure 1
D1
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
CE
falling edge to the DTMF signal output.
D0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
Tone Output Frequency
REV:2.0
697+1209
697+1336
697+1477
770+1209
770+1336
770+1477
852+1209
852+1336
852+1477
941+1336
941+1209
941+1477
697+1633
770+1633
852+1633
941+1633
Page 5 of 10
SC9200
2004.08.03
S
/P