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TDA7468D Datasheet(PDF) 9 Page - STMicroelectronics |
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TDA7468D Datasheet(HTML) 9 Page - STMicroelectronics |
9 / 23 page 9/23 TDA7468 5 SOFTWARE SPECIFICATION Interface Protocol The interface protocol comprises: A start condition (S) A chip address byte, containing the TDA7468D address A subaddress bytes A sequence of data (N byte + acknowledge) A stop condition (P) ACK = Acknowledge S = Start; P = Stop A = Address B = Auto Increment 6 EXAMPLES 6.1 No Incremental Bus The TDA7468D receives a start condition, the correct chip address, a subaddress with the B = 0 (no in- cremental bus), N-data (all these data concern the subaddress selected), a stop condition. 6.2 Incremental Bus The TDA7468D receive a start conditions, the correct chip address, a subaddress with the B = 1 (incre- mental bus): now it is in a loop condition with an autoincrease of the subaddress whereas SUBADDRESS from "XXX1000" to "XXX1111" of DATA are ignored. The DATA 1 concern the subaddress sent, and the DATA 2 concern the subaddress sent plus one in the loop etc, and at the end it receivers the stop condition. Table 5. POWER ON RESET CONDITION MSB LSB D7 D6 D5 D4 D3 D2 D1 D0 1 111 1 1 1 0 S 1 0 0 0 1 0 0 0 ACK ACK DATA ACK P MSB LSB MSB LSB MSB LSB CHIP ADDRESS D96AU420 X DATA SUBADDRESS DATA 1 to DATA n X X B S 1 0 0 0 1 0 0 0 ACK ACK DATA ACK P MSB LSB MSB LSB MSB LSB CHIP ADDRESS D96AU421 X D3 SUBADDRESS DATA X X 0 D2 D1 D0 S 1 0 0 0 1 0 0 0 ACK ACK DATA ACK P MSB LSB MSB LSB MSB LSB CHIP ADDRESS D96AU422 X D3 SUBADDRESS DATA 1 to DATA n X X 1 D2 D1 D0 |
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