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TDA7309 Datasheet(PDF) 8 Page - STMicroelectronics |
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TDA7309 Datasheet(HTML) 8 Page - STMicroelectronics |
8 / 14 page TDA7309 8/14 4 SOFTWARE SPECIFICATION 4.1 Interface Protocol The interface protocol comprises: ■ A start condition (s) ■ A chip address byte, containing the TDA7309 address (the 8th bit of the byte must be 0). The TDA7309 must always acknowledge at the end of each transmitted byte. ■ A sequence of data (N-bytes + acknowledge) ■ A stop condition (P) Figure 19. ACK = Acknowledge S = Start P = Stop MAX CLOCK SPEED 400kbits/s Table 7. Chip address Table 8. Function Codes Table 9. Channel Abilitation Codec MSB LSB 001 1001 0 pin address open 001 1000 0 pin address close to ground MSB F6F5 F4 F3F2 F1 LSB VOLUME 0 XXX XXX X MUTE/LOUD 1 0 0 X X X X X INPUTS 1 0 1 X X X X X CHANNEL 1 1 0 X X X X X MSB F6 F5 F4 F3 F2 F1 LSB FUNCTION 1 1 0 channel XX X0 0 RIGHT XX X0 1 LEFT XX X1 0 BOTH XX X1 1 BOTH |
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