TDA7561

Examples of bytes sequence

Doc ID 8326 Rev 6

23/27

8

Examples of bytes sequence

1 - Turn-on diagnostic - Write operation

2 - Turn-on diagnostic - Read operation

The delay from 1 to 2 can be selected by software, starting from 1 ms

3a - Turn-on of the power amplifier with 26 dB gain, 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 DC offset (2V 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 1 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

DB3

ACK

DB4

ACK STOP

Start

Address byte with D0 = 0

ACK

IB1

ACK

IB2

ACK STOP

X000000X

XXX1X0XX

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

XX1XX11X

XXX1X0XX

Start Address byte with D0 = 1 ACK

DB1

ACK

DB2

ACK

DB3

ACK

DB4

ACK STOP