TDA7566 Datasheet, PDF (15/19 Pages) STMicroelectronics – MULTIFUNCTION QUAD POWER AMPLIFIER WITH BUILT-IN DIAGNOSTICS FEATURES

If R/W = 1, the TDA7566 sends 4 "Diagnostics Bytes" to mP: 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
Channel LF
current detection
Output peak current < 250mA - Open load (D5 = 1)
Output peak current > 500mA - Open load (D5 = 0)
D4
Channel LF
Turn-on diagnostic (D4 = 0)
Permanent diagnostic (D4 = 1)
D3
Channel LF
Normal load (D3 = 0)
Short load (D3 = 1)
D2
Channel LF
Turn-on diag.: No open load (D2 = 0)
Open load detection (D2 = 1)
Offset diag.: No output offset (D2 = 0)
Output offset detection (D2 = 1)
D1
Channel LF
No short to Vcc (D1 = 0)
Short to Vcc (D1 = 1)
D0
Channel LF
No 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)
Current sensor not activated (D6 = 0)
Current sensor activated (D6 = 1)
Channel LR
current detection
Output peak current < 250mA - Open load (D5 = 1)
Output peak current > 500mA - Open load (D5 = 0)
Channel LR
Turn-on diagnostic (D4 = 0)
Permanent diagnostic (D4 = 1)
Channel LR
Normal load (D3 = 0)
Short load (D3 = 1)
Channel LR
Turn-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)
TDA7566
15/19