CS8416-CS datasheet(26/48 Pages) CIRRUS

26 / 48 page

CS8416

DS578PP2

INT[1:0] - Interrupt output pin (INT) control

Default = ‘00’

00 - Active high; high output indicates interrupt condition has occurred

01 - Active low, low output indicates an interrupt condition has occurred

10 - Open drain, active low. Requires an external pull-up resistor on the INT pin. Thus it is not recom-

mended to multiplex INT onto GPO2 in I2C control port mode since an external resistor is re-

quired on GPO2 to specify the AD2 bit of the chip address.

11 – Reserved

CHS – Sets which channel's C data is decoded in the Receiver Channel Status register

0 – A channel

1 – B channel

8.3

Control2 (02h)

DETCI – D to E status transfer inhibit

Default = ‘0’

0 – Allow update

1 – Inhibit update

Emph_CNTL[2:0] – De-emphasis filter control

Default = 000

000 – De-emphasis filter off

001 – 32 KHz setting

010 – 44.1 KHz setting

011 – 48 KHz

100 – 50us/15us de-emphasis filter auto-select on. Coefficients(32, 44.1 or 48 KHz or no de-empha-

sis filter at all) match the pre-emphasis and sample frequency indicators in the channel status bits of

Channel A. Thus it is impossible to have de-emphasis applied to one channel but not the other. Also

it turns off the de-emphasis filter if the audio data is detected to be non-linear data.

GPO0SEL[3:0] – GPO0 Source select. See GPO section in main text for settings table.

Default = 0000

8.4

Control3 (03h)

5432

DETCI

EMPH_CNTL2 EMPH_CNTL1 EMPH_CNTL0

GPO0SEL3

GPO0SEL2

GPO0SEL1

GPO0SEL0

43210

GPO1SEL3

GPO1SEL2

GPO1SEL1

GPO1SEL0

GPO2SEL3

GPO2SEL2

GPO2SEL1

GPO2SEL0

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