CS4399 datasheet(53/111 Pages) CIRRUS

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DS1113F1

CS4399

5.9 Audio Output Power-Up Sequence

5.9.2

DSD Power-Up Sequence

Example 5-6. DSD Power-Up Sequence

STEP

TASK

VALUE

DESCRIPTION

1 Run DSD power-up initialization sequence in Ex. 5-4.

2 Power on appropriate interface.Power Down Control. 0x20000

data (0x20000)

AND (0xHH)

For DoP on XSP, HH = 7F.

For DoP on ASP, HH = BF.

For DSD interface, HH = DF.

PDN_XSP

PDN_ASP

PDN_DSDIF

PDN_HP

PDN_XTAL

PDN_PLL

PDN_CLKOUT

Reserved

XSP interface enable

ASP interface enable

DSD interface enable

3 Pop-free startup

0x1002C

0x0A

4 Power on amplifier

Power Down Control. 0x20000

data (0x20000)

AND (0xEF)

PDN_XSP

PDN_ASP

PDN_DSDIF

PDN_HP

PDN_XTAL

PDN_PLL

PDN_CLKOUT

Reserved

Power up DAC output

5 Wait for 10 ms

6 Restore defaults

0xC0006

0x0C

0xC0002

0x10

0xC0009

0x20

7 Audio output will be active. Wait for 1000 ms.

8 Restore defaults

0x1002C

0x00

0x10010

0x00

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