TDA7561 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

TDA7561

Multifunction quad power amplifier with built-in diagnostics features

STMicroelectronics 

Software specifications

TDA7561

Table 7. IB2

Bit

Instruction decoding bit

D7 X

D6 Used for testing

D5 Used for testing

Standby on - Amplifier not working - (D4 = 0)

D4

Standby off - Amplifier working - (D4 = 1)

Power amplifier mode diagnostic (D3 = 0)

D3

Line driver mode diagnostic (D3 = 1)

D2 X

D1 X

D0 X

If R/W = 1, the TDA7561 sends 4 "Diagnostics Bytes" to µP: DB1, DB2, DB3 and DB4.

Table 8. DB1

Bit

Instruction decoding bit

D7 Thermal warning active (D7 = 1)

Diag. cycle not activated or not terminated (D6 = 0)

D6

Diag. cycle terminated (D6 = 1)

D5 X

Channel LFTurn-on diagnostic (D4 = 0)

D4

Permanent diagnostic (D4 = 1)

Channel LF

D3 Normal load (D3 = 0)

Short load (D3 = 1)

Channel LFTurn-on diag.: No open load (D2 = 0)

Open load detection (D2 = 1)

D2

Offset diag.: No output offset (D2 = 0)

Output offset detection (D2 = 1)

D1 Channel LFNo short to Vcc (D1 = 0)Short to Vcc (D1 = 1)

D0 Channel LFNo short to GND (D1 = 0)Short to GND (D1 = 1)

20/27

Doc ID 8326 Rev 6

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