PCM2900

PCM2902

SLES035C − MARCH 2002 − REVISED MARCH 2007

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Suspend and Resume Sequence

The PCM2900/2902 enters the suspend state after it sees a constant idle state on the USB bus, approximately

5 ms. While the PCM2900/2902 enters the suspend state, SSPND flag (pin 28) is asserted. The

PCM2900/2902 wakes up immediately when detecting the non-idle state on the USB bus.

D+/D−

VOUTL

VOUTR

Audio Data

Audio Data

Last Audio Data

Detach

SOF

SOF

SOF

SOF

SOF

1 ms

VBUS (Pin 3)

Figure 33. Play, Stop, and Detach

D+/D−

VINL

VINR

1 ms

SET_INTERFACE

Audio Data

IN Token

Audio Data

IN Token

Audio Data

IN Token

SOF

SOF

SOF

SOF

SOF

Figure 34. Record Sequence

5 ms

D+/D−

SSPND

Idle

Active

Active

Suspend

Figure 35. Suspend and Resume