SC9200 查看數據表（PDF） - Unspecified

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产品描述 (功能)

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SC9200

DTMF GENERATORS

Unspecified 

Silan

Semiconductors

SC9200A/B

FUNCTIONAL DESCRIPTION

The SC9200A/B are DTMF generators for µC interfaces. They are controlled by a µC in the serial mode.

1. Serial mode (SC9200A/B)

The SC9200A/B employ a data input, a 5-bit code, and a synchronous clock to transmit a DTMF signal. Every

digital of a phone number to be transmitted is selected by a series of inputs that consist of 5-bit data. Of the 5 bits,

the D0 (LSB) is the first received bit. The SC9200A/B will latch data on the falling edge of the clock (CLK pin).

The relationship between the digital codes and the tone output frequency is shown in Table 1 as for the control

timing diagram, refer to Figure 1.

Table 1: Digits vs. input data vs. tone output frequency (serial mode)

Digit

D4

D3

D2

D1

D0

1

0

0

0

0

1

2

0

0

0

1

0

3

0

0

0

1

1

4

0

0

1

0

0

5

0

0

1

0

1

6

0

0

1

1

0

7

0

0

1

1

1

8

0

1

0

0

0

9

0

1

0

0

1

0

0

1

0

1

0

*

0

1

0

1

1

#

0

1

1

0

0

A

0

1

1

0

1

B

0

1

1

1

0

C

0

1

1

1

1

D

0

0

0

0

0

--

1

0

0

0

0

--

1

0

0

0

1

--

1

0

0

1

0

--

1

0

0

1

1

--

1

0

1

0

0

--

1

0

1

0

1

--

1

0

1

1

0

--

1

0

1

1

1

DTMF OFF

1

1

1

1

1

*Notes: The codes not listed in Table 1 are not used D4 is MSB.

Tone Output Frequency (Hz)

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

697

770

852

941

1209

1336

1477

1633

--

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 1.0

5

2001.02.02

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