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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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HT95R22 데이터시트(PDF) 33 Page - Holtek Semiconductor Inc |
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HT95R22 데이터시트(HTML) 33 Page - Holtek Semiconductor Inc |
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33 / 52 page  HT95R22 Rev. 1.00 33 January 6, 2009 DTMF Frequency Selection Table Low Group High Group DTMF Output Code TR4 TR3 TR2 TR1 TC4 TC3 TC2 TC1 Low High 0001000 1 697 1209 1 0001001 0 697 1336 2 0001010 0 697 1477 3 0001100 0 697 1633 A 0010000 1 770 1209 4 0010001 0 770 1336 5 0010010 0 770 1477 6 0010100 0 770 1633 B 0100000 1 852 1209 7 0100001 0 852 1336 8 0100010 0 852 1477 9 0100100 0 852 1633 C 1000000 1 941 1209 * 1000001 0 941 1336 0 1000010 0 941 1477 # 1000100 0 941 1633 D Single tone for testing only 0001000 0 697 x x 0010000 0 770 x x 0100000 0 852 x x 1000000 0 941 x x 0000000 1 x 1209 x 0000001 0 x 1336 x 0000010 0 x 1477 x 0000100 0 x 1633 x Writing other values to TR4~TR1, TC4~TC1 may generate an unpredictable tone. 1 / 2 V D D T O N E = 1 A l l t h e t i m i n g o f t h e T O N E = 1 a n d T O N E = 0 a r e d e t e r m i n e d b y s o f t w a r e T O N E = 0 T O N E = 1 T O N E = 0 T O N E = 1 T O N E = 0 D _ P D W N = 0 D _ P D W N = 1 DTMF Output |
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