MAX13301 Datasheet, PDF (26/37 Pages) Maxim Integrated Products – 4-Channel, Automotive Class D Audio Amplifier Feedback After the Filter

4-Channel, Automotive Class D Audio Amplifier
Table 22. Status Register Bit Description (continued)
BIT
OC
CPUV
CLIP
BIT DESCRIPTION
General Overcurrent Indicator. OC asserts when there is an overcurrent condition on any of the outputs
such as a short-to-ground/battery. To identify which output(s) is experiencing an overcurrent condition, read
the OSTAT0.OC[3:0] (overcurrent indicator bit).
0 = An overcurrent condition exists on one or more of the outputs.
1 = No overcurrent condition.
Charge-Pump Undervoltage Indicator. CPUV asserts when the voltage on the hold capacitor of the charge
pump (CHOLD) falls below 3.87V. It deasserts once the voltage rises above 4.1V.
0 = Undervoltage on CHOLD
1 = Adequate voltage on CHOLD
General Clip Indicator. CLIP asserts when any of the outputs is clipping. To identify which output(s) is clip-
ping, read the OSTAT0.CLIP[3:0] (clip indicator) bits.
0 = One or more outputs are clipping.
1 = None of the outputs are clipping.
Table 23. Status Register 0
BIT #
NAME
7
OC3
6
OC2
5
OC1
OSTAT0
4
OC0
3
CLIP3
2
CLIP2
1
CLIP1
0
CLIP0
Table 24. Status Register 0 Bit Description
BIT
BIT DESCRIPTION
OC[3:0]
CLIP[3:0]
Overcurrent Indicator. An overcurrent condition such as a short-to-ground/battery on any of the outputs
causes the corresponding OC[3:0] bit to latch to 0. Write a 1 to this bit to clear it. Reset also clears this bit.
An overcurrent indicator is available for each output: OC3 is for output 3, OC2 is for output 2, etc.
0 = There is an overcurrent condition on the output.
1 = There is no overcurrent condition on the output.
Clip Indicator. CLIP[3:0] is a real-time clip indicator for each output. This bit asserts only during the times
when an overdriven output is actually clipping. A clip indictor is available for each output: CLIP3 is for output
3, CLIP2 is for output 2, etc.
0 = Output is clipping.
1 = Output is not clipping.
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