CS43130 Datasheet, PDF (75/137 Pages) Cirrus Logic – 130-dB, 32-Bit High-Performance DAC with Integrated Headphone Driver

CS43130
5.10 Example Sequences
5.10.6 Switching from PCM to Analog-In Playback
Ex. 5-16 makes the following assumptions:
• The CS43130 is powered up, out of reset, and currently operating in PCM playback mode.
• A headphone is connected to the headphone jack.
• Headphone detect is enabled and HPDETECT_PLUG_INT = 1.
• XTAL is used as MCLK source.
Example 5-16. Switching from PCM to Analog-In Playback
STEP
TASK
1 Enable soft ramp
2 PCM Power Down Sequence
3 Set MCLK Source to RCO
4 Wait for 150 µs.
5 Power down crystal
6 Enable HPINx
REGISTER/BIT FIELDS
PCM Path Signal Control 1. 0x90003
PCM_RAMP_DOWN
PCM_VOL_BEQA
PCM_SZC
PCM_AMUTE
PCM_AMUTEBEQA
PCM_MUTE_A
PCM_MUTE_B
Refer to Section 5.7.1
System Clocking Control 1. 0x10006
Reserved
MCLK_INT
MCLK_SRC_SEL
VALUE
data(0x90003) OR
(0xA0)
1
Enable soft ramp
x
10
x
x
0
0
DESCRIPTION
0x06
0000 0
1
10
Frequency of MCLK_INT is don't care
MCLK source set to RCO
Power Down Control. 0x20000
PDN_XSP
PDN_ASP
PDN_DSDIF
PDN_HP
PDN_XTAL
PDN_PLL
PDN_CLKOUT
Reserved
Refer to Section 5.6.1
data (0x20000) OR
(0x08)
x
1
ASP already powered down
x
1
HP already powered down
1
Power down XTAL.
x
x
0
DS1073F1
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