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TEA7092 数据表(PDF) 43 Page - STMicroelectronics |
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TEA7092 数据表(HTML) 43 Page - STMicroelectronics |
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43 / 57 page  IV - MICROCONTROLLER INTERFACE (continued) IV.3.1 - Different Codes (continued) - HFIN input selection For answering machine or cordless connection, it can be requested to select HFIN (Pin 22) input, without enabling the loudspeaker, for this the following procedure should be sent : • Handsfree code : 0 1 1 0 0 1 0 • Tx & Rx mutes : 0 0 1 0 0 1 0 • HFIN input select : 0 1 1 0 1 1 1 To go back to handsfree mode, send : • Speech mode : 0 0 1 0 0 0 0 Or to go back to handset mode, send : • Speech mode : 0 0 1 0 0 0 0 • Handset code : 0 1 1 0 0 0 0 - The DTMF and SINE WAVE codes. These codes are memorized, independtly from the mode or operating code. For example one of these code can be sent in Handset mode and when the Dialing mode code is sent, the DTMF frequencies sent on the line are those previously programmed in the Handset mode. Codes Key in DTMF Dialing DTMF Dialing (Code 0010001 sent before) SINE WAVE (Code 0011101 or 0011110 sent before) a6 a5 a4 a3 a2 a1 a0 0000000 ”2” 697Hz + 1336Hz 0000001 ”1” 697Hz + 1209Hz 348Hz or 604Hz 0000010 ”A” 697Hz + 1633Hz 0000011 ”3” 697Hz + 1477Hz 0000100 ”8” 852Hz + 1336Hz 0000101 ”7” 852Hz + 1209Hz 0000110 ”C” 852Hz + 1633Hz 0000111 ”9” 852Hz + 1477Hz 426Hz or 738Hz 0001000 ”5” 770Hz + 1336Hz 385Hz or 668Hz 0001001 ”4” 770Hz + 1209Hz 0001010 ”B” 770Hz + 1633Hz 0001011 ”6” 770Hz + 1477Hz 0001100 ”0” 941Hz + 1336Hz 0001101 ”*” 941Hz + 1209Hz 0001110 ”D” 941Hz + 1633Hz 470Hz or 816Hz 0001111 ”#” 941Hz + 1477Hz - The Other Codes Codes Remarks a6 a5 a4 a3 a2 a1 a0 0010001 Ring Start 0010111 Reset Control (High to Low level on Pin 11 (RESET)), Internal TEA7092 Initialization and Microprocessor Serial Bus Connection Inhibited 0110011 Ring Melody Control, to listen the Ring Melody in the Loudspeaker During OFF-HOOK Mode. 0101000 TEA7092 Initialization (to go back to internal default programmation) TEA7092 - TELEPHONE SET INTEGRATED CIRCUIT 43/57 |
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