TDF8544
NXP Semiconductors
I2C-bus controlled 4 50 W power amplifier
Table 15. Data byte DB3 …continued
Bit
Description
D5 and D4
channel 1 DC-load or AC-load detection
if bit IB4[D4] = 1, AC-load detection is enabled, bit D5 does not care, bit
D4 has the following meaning:
0 = no AC-load
1 = AC-load detected
if bit IB4[D4] = 0, AC-load detection is disabled, bits D5 and D4 are
available for DC-load detection:
00 = normal load
01 = line driver load
10 = open load
11 = not valid
D3
D2
D1
D0
channel 1 shorted load
0 = no shorted load
1 = shorted load
channel 1 output offset
0 = no output offset
1 = output offset
channel 1 short to VP
0 = no short to VP
1 = short to VP
channel 1 short to ground
0 = no short to ground
1 = short to ground
Remark: Data bits are only reset (cleared after read) after reading 5 data bytes.
Table 16. Data byte DB4
Bit
Description
D7
power supply 16 V overvoltage warning
0 = no overvoltage warning
1 = overvoltage warning occurred
speaker fault channel 3
0 = no speaker fault
D6
1 = speaker fault
TDF8544
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 2 — 29 August 2011
29 of 54
NXP [ NXP ]
