CS43130 Datasheet, PDF (58/137 Pages) Cirrus Logic – 130-dB, 32-Bit High-Performance DAC with Integrated Headphone Driver

CS43130
5.6 Enable/Disable Alternate Headphone Path (HPINx)
5.6 Enable/Disable Alternate Headphone Path (HPINx)
If the user decides to use the HPINx path, the following sequences must be followed to enable/disable the alternate
headphone path (HPINx).
5.6.1 HPINx Alternate Headphone Path Enable Sequence
To enable HPINx path when EXT_VCPFILT = 0, the following sequences should be followed:
Example 5-1. HPINx Enable Sequence when EXT_VCPFILT = 0
TASK
Enable headphone input
REGISTER/BIT FIELDS
0x10010
0x20019
0xB0006
0xB0005
HP Output Control 1. 0x80000
HP_CLAMPA
HP_CLAMPB
OUT_FS
HP_IN_EN
Reserved
0x10010
VALUE
0x99
0x01
0xDC
0xE4
0x38
0
0
11
1
000
0x00
DESCRIPTION
Function Disabled
Function Disabled
Headphone output voltage setting is irrelevant
Enable HPIN switch
To enable HPINx path when EXT_VCPFILT = 1, the following sequences should be followed:
Example 5-2. HPINx Enable Sequence when EXT_VCPFILT = 1
TASK
Enable headphone input
REGISTER/BIT FIELDS
0x10010
0x20019
HP Output Control 1. 0x80000
HP_CLAMPA
HP_CLAMPB
OUT_FS
HP_IN_EN
Reserved
0x10010
VALUE
0x99
0x01
0x38
0
0
11
1
000
0x00
DESCRIPTION
Function Disabled
Function Disabled
Headphone output voltage setting is irrelevant
Enable HPIN switch
5.6.2 HPINx Disable Sequence
To disable HPINx path when EXT_VCPFILT = 0, the following sequences should be followed:
Example 5-3. HPINx Disable when EXT_VCPFILT = 0
TASK
Disable headphone input
REGISTER/BIT FIELDS
0x10010
HP Output Control 1. 0x80000
HP_CLAMPA
HP_CLAMPB
OUT_FS
HP_IN_EN
Reserved
0xB0005
0xB0006
0x20019
0x10010
VALUE
0x99
0x30
0
0
11
0
000
0x64
0x00
0x00
0x00
Disable HPIN
DESCRIPTION
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DS1073F1