TDA7561 Datasheet, PDF (15/19 Pages) STMicroelectronics – MULTIFUNCTION QUAD POWER AMPLIFIER WITH BUILT-IN DIAGNOSTICS FEATURES

If R/W = 1, the TDA7561 sends 4 "Diagnostics Bytes" to µP: DB1, DB2, DB3 and DB4.
DB1
D7
Thermal Warning active (D7 = 1)
D6
Diag. cycle not activated or not terminated (D6 = 0)
Diag. cycle terminated (D6 = 1)
D5
X
D4
Channel LFTurn-on diagnostic (D4 = 0)
Permanent diagnostic (D4 = 1)
Channel LF
D3
Normal load (D3 = 0)
Short load (D3 = 1)
Channel LFTurn-on diag.: No open load (D2 = 0)
D2
Open load detection (D2 = 1)
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)
DB2
D7
D6
D5
D4
D3
D2
D1
D0
Offset detection not activated (D7 = 0)
Offset detection activated (D7 = 1)
X
X
Channel LRTurn-on diagnostic (D4 = 0)
Permanent diagnostic (D4 = 1)
Channel LRNormal load (D3 = 0)
Short load (D3 = 1)
Channel LRTurn-on diag.: No open load (D2 = 0)
Open load detection (D2 = 1)
Permanent diag.: No output offset (D2 = 0)
Output offset detection (D2 = 1)
Channel LR
No short to Vcc (D1 = 0)
Short to Vcc (D1 = 1)
Channel LR
No short to GND (D1 = 0)
Short to GND (D1 = 1)
TDA7561
15/19