ALC892 데이터 시트보기 (PDF) - Realtek Semiconductor

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ALC892

7.1+2 CHANNEL HD AUDIO CODEC WITH CONTENT PROTECTION

Realtek Semiconductor 

ALC892

Datasheet

Exit from ‘Link Reset’:

s If BCLK is re-started for any reason (codec wake-up event, power management, etc.)

t Software is responsible for de-asserting RST# after a minimum of 100µs BCLK running time (the

100µsec provides time for the codec PLL to stabilize)

u Minimum of 4 BCLK after RST# is de-asserted, the controller starts to signal normal frame SYNC

v When the codec drives its SDI to request an initialization sequence (when the SDI is driven high at the

last bit of frame SYNC, it means the codec requests an initialization sequence)

Previous Frame

4 BCLK

4 BCLK

Link in Reset >=100 usec >= 4 BCLK Initialization Sequence

BCLK

SYNC

SDOs

SDIs

RST#

Normal Frame

SYNC is absent

2

Driven Low

Driven Low

Pulled Low

Pulled Low

Driven Low

Pulled Low

Pulled Low

1

3

4

5

6

Figure 13. Link Reset Timing

Normal Frame

SYNC

8

Wake Event

9

7

7.3.2. Codec Reset

A ‘Codec Reset’ is initiated via the codec RESET command verb. It results in the target codec being reset

to the default state. After the target codec completes its reset operation, an initialization sequence is

requested.

7.1+2 Channel HD Audio Codec with Content Protection 20

Track ID: JATR-2265-11 Rev. 1.3

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