TDA7575

10/17

If R/W = 1, the TDA7575 sends 2 "Diagnostics Bytes" to

µP: DB1 and DB2.

DB1

DB2

D7

Thermal warming (if Tchip

≥ 150°C, D7 = 1)

D6

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

Diag. cycle terminated (D6 = 1)

D5

X

D4

Channel 1

Turn-on diagnostic (D4 = 0)

Permanent diagnostic (D4 = 1)

D3

Channel 1

Normal load (D3 = 0)

Short load (D3 = 1)

D2

Channel 1

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 1

D0

Channel 1

No short to GND (D1 = 0)

Short to GND (D1 = 1)

D7

Offset detection not activated (D7 = 0)

Offset detection activated (D7 = 1)

D6

X

D5

X

D4

Channel 2

Turn-on diagnostic (D4 = 0)

Permanent diagnostic (D4 = 1)

D3

Channel 2

Normal load (D3 = 0)

Short load (D3 = 1)

D2

Channel 2

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)

D1

Channel 2

D0

Channel 2

No short to GND (D1 = 0)

Short to GND (D1 = 1)