Software specifications

TDA7575B

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Doc ID 14103 Rev 3

6.1

Examples of bytes sequence

1 - Turn-on diagnostic - Write operation

L

2 - Turn-on diagnostic - Read operation

The delay from 1 to 2 can be selected by software, starting from T.B.D. ms

3a - Turn-on of the power amplifier with mute on, diagnostic defeat.

3b - Turn-off of the power amplifier

4 - Offset detection procedure enable

5 - Offset detection procedure stop and reading operation (the results are valid only for the

offset detection bits (D2 of the bytes DB1, DB2, DB3, DB4).

●

The purpose of this test is to check if a D.C. offset (2 V typ.) is present on the outputs,

produced by input capacitor with anomalous leakage current or humidity between pins.

●

The delay from 4 to 5 can be selected by software, starting from T.B.D. ms

Start

Address byte with D0 = 0

ACK

IB1 with D6 = 1

ACK

IB2

ACK

STOP

Start

Address byte with D0 = 1

ACK

DB1

ACK

DB2

ACK

STOP

Start

Address byte with D0 = 0

ACK

IB1

ACK

IB2

ACK

STOP

X000XXXX

XXX1XX1X

Start

Address byte with D0 = 0

ACK

IB1

ACK

IB2

ACK

STOP

X0XXXXXX

XXX0XXXX

Start

Address byte with D0 = 0

ACK

IB1

ACK

IB2

ACK

STOP

XX1XX1XX

XXX1XXXX

Start

Address byte with D0 = 1

ACK

DB1

ACK

DB2

ACK

STOP