CS98100 Просмотр технического описания (PDF) - Cirrus Logic

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CS98100

DVD Processor for Low Cost DVD Players

Cirrus Logic 

CS98100

1.2.5 Digital Audio Interface Timing

Figure 8 and Figure 9 illustrate the signal timing for the digital audio pins. The bi-directional AUD_XCK

pin clocks at 8x the frequency of the AUD_BCK pin. The AUD_BCK pin outputs at 32x or 48x of the

sample frequency, and transitions on the falling edge of the AUD_XCK pin. AUD_BCK is shown without

polarity to indicate the polarity is programmable.

Symbol

tslri

tsdi

thsdi

Description

AIN_LRCK setup to AUD_BCK active edge

Min

25

AIN_DATA setup to AUD_BCK active edge

25

AIN_DATA hold time after AUD_BCK active edge 1

Typ Max Unit

-

ns

-

ns

-

ns

Table 5. Digital Audio In Characteristics

*AUD_BCK (Output)

AIN_LRCK (Input)

t lrts

tsdsus tsdhs

AIN_DATA (Input)

* Active clock edge is programmable. Timing is referenced from active edge.

Figure 8. Digital Audio In Timing Diagram

13

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