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TDA7438 Folha de dados(PDF) 8 Page - STMicroelectronics |
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TDA7438 Folha de dados(HTML) 8 Page - STMicroelectronics |
8 / 17 page SOFTWARE SPECIFICATION Interface Protocol The interface protocol comprises: A start condition (S) A chip address byte, containing the TDA7438 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 S 10001000 ACK ACK DATA ACK P MSB LSB MSB LSB MSB LSB CHIP ADDRESS D96AU420 X DATA SUBADDRESS DATA 1 to DATA n XXB EXAMPLES No Incremental Bus The TDA7438 receives a start condition, the cor- rect chip address, a subaddress with the B = 0 (no incremental bus), N-data (all these data con- cern the subaddress selected), a stop condition. S 10001000 ACK ACK DATA ACK P MSB LSB MSB LSB MSB LSB CHIP ADDRESS D96AU421 XD3 SUBADDRESS DATA XX 0 D2 D1 D0 Incremental Bus The TDA7438 receive a start conditions, the cor- rect chip address, a subaddress with the B = 1 (incremental 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. S 10001000 ACK ACK DATA ACK P MSB LSB MSB LSB MSB LSB CHIP ADDRESS D96AU422 XD3 SUBADDRESS DATA 1 to DATA n XX 1 D2 D1 D0 TDA7438 8/17 |
Nº de peça semelhante - TDA7438 |
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Descrição semelhante - TDA7438 |
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