CS43130 Datasheet, PDF (72/137 Pages) Cirrus Logic – 130-dB, 32-Bit High-Performance DAC with Integrated Headphone Driver

CS43130
5.10 Example Sequences
Example 5-13. DoP Playback with PLL (Cont.)
STEP
TASK
44 Set MCLK source and frequency
45 Wait for at least 150 µs.
46 Enable ASP clocks
47 Power up HP
REGISTER/BIT FIELDS
System Clocking Control. 0x10006
Reserved
MCLK_INT
MCLK_SRC_SEL
VALUE
0x05
DESCRIPTION
0000 0
1 MCLK Frequency is set to 22.5792 MHz
01 MCLK Source is set to PLL
Pad Interface Configuration. 0x1000D 0x02
Reserved
XSP_3ST
ASP_3ST
0000 00
1 XSP Interface status is don't care (set to default)
0 Enable serial clocks in Master Mode
Refer to Ex. 5-10 for DSD power-up sequence. Note that in Step 2 of Ex. 5-10, HH = BF for DoP on
ASP interface. Skip Step 1 of Ex. 5-10 (completed in Step 3 above).
5.10.4 Analog-In Startup
Ex. 5-14 shows an example sequence of starting up the CS43130 in analog passthrough mode.
Example 5-14. Start Up to Analog-In
STEP
1
2
3
4
TASK
REGISTER/BIT FIELDS
VALUE
Apply all relevant power supplies, then assert RESET.
Wait for 1.5 ms. MCLK Source is set to RCO by default.
Enable Headphone detect. See Section 5.10.8 “Headphone Detection”
Enable HPINx path. See See Section 5.6.1 “HPINx Alternate Headphone Path Enable Sequence”
DESCRIPTION
5.10.5 Switching from Analog-In to PCM Playback
Ex. 5-15 assumes that:
• The CS43130 is powered up, out of reset, and is currently operating in analog passthrough mode as in Ex. 5-14.
• The ASP and PCM interfaces are not yet configured.
• CS43130 XTI/XTO is connected to a 22.5792-MHz crystal.
• ASP interface is slave.
Example 5-15. Switching from Analog-In to PCM Playback
STEP
TASK
1 Configure XTAL driver.
REGISTER/BIT FIELDS
VALUE
DESCRIPTION
2 Configure XTAL bias current Crystal Setting. 0x20052
strength (assuming
at 22.5792 MHz)
River
Crystal
Reserved
XTAL_IBIAS
0x04
0000 0
100
Bias current set to 12.5 µA
3 Read Interrupt Status 1 register (0xF0000) to clear sticky bits.
4 Enable XTAL interrupts
Interrupt Mask 1. 0xF0010
data(0xF0010)
AND 0xE7
DAC_OVFL_INT_MASK
HPDETECT_PLUG_INT_MASK
HPDETECT_UNPLUG_INT_MASK
XTAL_READY_INT_MASK
XTAL_ERROR_INT_MASK
PLL_READY_INT_MASK
PLL_ERROR_INT_MASK
PDN_DONE_INT_MASK
x
x
x
0
Enable XTAL_READY interrupt
0
Enable XTAL_ERROR interrupt
x
x
x
5 Start XTAL
Power Down Control. 0x20000
data (0x20000)
AND 0xF6
PDN_XSP
PDN_ASP
PDN_DSDIF
PDN_HP
PDN_XTAL
PDN_PLL
PDN_CLKOUT
Reserved
x
x
x
x
0
Power up XTAL driver
x
x
0
6 Apply PCM power-up initialization. Refer to Ex. 5-7
7 Configure ASP interface. Sample rate set to 44.1 kHz. ASP is slave to incoming clock.
8 Set ASP sample rate
Serial Port Sample Rate. 0x1000B
0x01
Reserved
ASP_SPRATE
0000
0001
Set sample rate to 44.1 kHz
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