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HT9200A Datasheet(PDF) 6 Page - Holtek Semiconductor Inc |
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HT9200A Datasheet(HTML) 6 Page - Holtek Semiconductor Inc |
6 / 13 page Table 2: Digits vs. input data vs. tone output frequency (parallel mode) Digit D3 D2 D1 D0 Tone Output Frequency (Hz) 10001 697 +1209 20010 697 +1336 30011 697 +1477 40100 770 +1209 50101 770 +1336 60110 770 +1477 70111 852 +1209 81000 852 +1336 91001 852 +1477 01010 941 +1336 * 1011 941 +1209 # 1100 941 +1477 A 1101 697 +1633 B 1110 770 +1633 C 1111 852 +1633 D 0000 941 +1633 HT9200A/HT9200B Rev. 1.50 6 April 29, 2013 For the HT9200B, the S/P pin has to be connected low for serial mode operation. Parallel mode ( HT9200B) The HT9200B provides four data inputs D0~D3 to gener- ate their corresponding DTMF signals. The S/P 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 fall- ing 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 in- put pins should not float. C E S / P X 2 D A T A C L K L S B M S B D T M F L S B M S B L S B M S B 1 1 1 1 1 D i g i t 1 D i g i t 2 D i g i t 1 D T M F s i g n a l D i g i t 2 D T M F s i g n a l S t o p c o d e ( O s c i l l a t o r ) t U P Figure 1 |
Similar Part No. - HT9200A_13 |
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Similar Description - HT9200A_13 |
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