D+/D–

V L

IN

V R

IN

1ms

SET_INTERFACE

AudioData

IN Token

AudioData

IN Token

AudioData

IN Token

SOF

SOF

SOF

SOF

SOF

T0259-01

5ms

D+/D–

SSPND

Idle

Active

Active

Suspend

T0057-02

PCM2906C

www.ti.com

SBFS037

– NOVEMBER 2011

Record Sequence

The PCM2906C starts audio capture into the internal memory after receiving the SET_INTERFACE command,

as shown in Figure 34.

Figure 34. Record Sequence

Suspend and Resume Sequence

The PCM2906C enters the suspend state after a constant idle state on the USB bus (approximately 5 ms), as

shown in Figure 35. While the PCM2906C enters the suspend state, the SSPND flag (pin 28) is asserted. The

PCM2906C wakes up immediately upon detecting a non-idle state on the USB.

Figure 35. Suspend and Resume Sequence

Copyright

© 2011, Texas Instruments Incorporated

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