TDA7561 datasheet(20/27 Pages) STMICROELECTRONICS

Part #	TDA7561

Description	Multifunction quad power amplifier with built-in diagnostics features

PDF	27 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

Logo

20 / 27 page

Software specifications

TDA7561

20/27

Doc ID 8326 Rev 6

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

Table 7.

IB2

Bit

Instruction decoding bit

Used for testing

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

Standby off - Amplifier working - (D4 = 1)

Power amplifier mode diagnostic (D3 = 0)

Line driver mode diagnostic (D3 = 1)

Table 8.

DB1

Bit

Instruction decoding bit

Thermal warning active (D7 = 1)

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

Diag. cycle terminated (D6 = 1)

Channel LFTurn-on diagnostic (D4 = 0)

Permanent diagnostic (D4 = 1)

Channel LF

Normal load (D3 = 0)

Short load (D3 = 1)

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

Open load detection (D2 = 1)

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

Output offset detection (D2 = 1)

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

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

TDA7561 Datasheet(PDF) 20 Page - STMicroelectronics