MAX13301 Datasheet, PDF (27/37 Pages) Maxim Integrated Products – 4-Channel, Automotive Class D Audio Amplifier Feedback After the Filter

4-Channel, Automotive Class D Audio Amplifier
Table 25. Status Register 1
BIT #
NAME
7
LDOK3
6
LDOK2
5
LDOK1
OSTAT1
4
LDOK0
3
LOAD3
2
LOAD2
1
LOAD1
0
LOAD0
Table 26. Status Register 1 Bit Description
BIT
LDOK[3:0]
LOAD[3:0]
BIT DESCRIPTION
Load Okay Indicator. When running the open-load diagnostic, LDOK[3:0] = 1 if the load resistance
is greater than the resistance threshold set by CTRL3.LDM (line driver mode bit), indicating that the
output is properly loaded and not open. A load okay indicator is available for each output: LDOK3 is
for output 3, LDOK2 is for output 2, etc.
0 = Output is loaded.
1 = Output is open.
Load Indicator. When running shorted load or tweeter diagnostic, LOAD[3:0] asserts if there is a
short across the load or if a tweeter is connected. See the Shorted-Load Diagnostic and Tweeter
Diagnostic sections for information on the use of LOAD[3:0] in performing load diagnostics.
LOAD[3:0] is available for each output: LOAD3 is for output 3, LOAD2 is for output 2, etc.
0 = Load threshold exceeded.
1 = Load threshold not exceeded.
Table 27. Status Register 2
BIT #
NAME
7
SBAT3
6
SBAT2
5
SBAT1
OSTAT2
4
SBAT0
3
SGND3
2
SGND2
1
SGND1
0
SGND0
Table 28. Status Register 2 Bit Description
BIT
SBAT[3:0]
BIT DESCRIPTION
Short-to-Battery Indicator. When running a short-to-ground/battery diagnostic, SBAT[3:0] provides indica-
tion of any short-to-battery for each output. Use SBAT[3:0] to ensure that there is no short-to-battery before
turning on the device. This indicator is available for each output: SBAT3 is for output 3, SBAT2 is for output
2, etc.
0 = Output is shorted to the battery.
1 = Output is not shorted to the battery.
SGND[3:0]
Short-to-Ground Indicator. When running a short-to-ground/battery diagnostic, SGND[3:0] provides indi-
cation of any short-to-ground for each output. Use SGND[3:0] to ensure that there is no short-to-ground
before turning on the device. This indicator is available for each output: SGND3 is for output 3, SGND2 is
for output 2, etc.
0 = Output is shorted to ground.
1 = Output is not shorted to ground.
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