CS43130 Datasheet, PDF (113/137 Pages) Cirrus Logic – 130-dB, 32-Bit High-Performance DAC with Integrated Headphone Driver

CS43130
7.5 Headphone and PCM Registers
Bits
Name
Description
1 HPLOAD_AC_ HP load AC measurement trigger. A change from 0 to 1 initiates the measurement process. After the measurement
START completes, this bit must be manually changed back to 0 before initiating another process.
(Default) HPLOAD_AC_START = 0
0 HPLOAD_ HP load DC measurement trigger. A change from 0 to 1 initiates the measurement process. After measurement
DC_START complete, this bit must be manually changed back to 0 before initiating another process.
(Default) HPLOAD_DC_START = 0
7.5.11 HP Load Measurement 1
R/W
7
6
5
4
3
2
HPLOAD_MEAS_FREQ_LSB
Default
0
0
0
0
0
0
Address 0xE0003
1
0
0
0
Bits
Name
Description
7:0 HPLOAD_ LSB of HP load measurement frequency selection for AC detect (5.86 Hz/lsb when MCLK_INT = 24.576 MHz. 5.94 Hz/
MEAS_ lsb when MCLK_INT = 22.5792 MHz). Frequency range is 20 Hz to 20 kHz.
FREQ_LSB _{Default: 0000 0000}
7.5.12 HP Load Measurement 2
R/W
7
6
5
4
3
2
HPLOAD_MEAS_FREQ_MSB
Default
0
0
0
0
0
0
Address 0xE0004
1
0
0
0
Bits
Name
Description
7:0 HPLOAD_ MSB of HP load measurement frequency selection for AC detect (5.86 Hz/lsb when MCLK_INT = 24.576 MHz. 5.94 Hz/
MEAS_ lsb when MCLK_INT = 22.5792 MHz). Frequency range is 20 Hz to 20 kHz.
FREQ_MSB _{Default: 0000 0000}
7.5.13 HP DC Load Status 0
Address 0xE000D
R/O
7
6
5
4
3
2
1
0
RL_DC_STAT_0
Default
0
0
0
0
0
0
0
0
Bits
Name
Description
7:0 RL_DC_ Byte 0 of HP DC load measured in .RL_DC_STAT_1[7:0] and RL_DC_STAT_0[7:3] represent integer portion of
STAT_0 impedance value.
RL_DC_STAT_0[2:0] represent fractional portion, with fractional weighting as follows:
[2]: 0.5
[1]: 0.25
[0]: 0.125
Default: 0000000
7.5.14 HP DC Load Status 1
Address 0xE000E
R/O
7
6
5
4
3
2
1
0
RL_DC_STAT_1
Default
0
0
0
0
0
0
0
0
Bits
Name
Description
7:0 RL_DC_ Byte 1 of HP DC load measured in .Refer to RL_DC_STAT_0 for details of measurement interpretation.
STAT_1 _{Default: 0000000}
DS1073F1
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