CS8416-CSZ datasheet(38/60 Pages) CIRRUS

38 / 60 page

DS578F3

CS8416

RMCKF

– Recovered Master Clock Frequency

Default = ‘0’

0 – RMCK output frequency is 256*FS.

1 – RMCK output frequency is 128*FS.

CHS

– Sets which channel's C data is decoded in the Receiver Channel Status register (0Ah).

Default = ‘0’

0 – A channel.

1 – B channel.

If CHS = 0 and TRUNC = 1, both channels' audio data will be truncated by the AUX[3:0] bits indicated in the

channel A Channel Status data. If CHS = 1 and TRUNC = 1, both channels' audio data will be truncated by

the AUX[3:0] bits indicated in the channel B Channel Status data. This will occur even if the AUX[3:0] bits

indicated in the channel A Channel Status data are not equal to the AUX[3:0] bits indicated in the channel

B Channel Status data.

14.4 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. See Figure 14 for De-emphasis filter response.

Default = ‘000’

000 – If the serial audio output port is using the AES3 direct-output format, the de-emphasis filter must re-

main off.

001 – 32 kHz setting.

010 – 44.1 kHz setting.

011 – 48 kHz setting.

100 – 50

μs/15 μs de-emphasis filter auto-select on. Coefficients (32, 44.1 or 48 kHz or no de-emphasis fil-

ter 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. The de-emphasis filter

is turned off if the audio data is detected to be non-audio data.

GPO0SEL[3:0]

– GPO0 Source select. See “General Purpose Outputs” on page 29.

Default = ‘0000’

76543210

DETCI

EMPH_CNTL2 EMPH_CNTL1 EMPH_CNTL0 GPO0SEL3

GPO0SEL2

GPO0SEL1

GPO0SEL0

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