PCM2901

PCM2903

SLES034B − MARCH 2002 − REVISED JUNE 2004

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When receiving the audio data, the PCM2901/2903 stores the first audio packet, which contained 1-ms audio

data, into the internal storage buffer. The PCM2901/2903 starts playing the audio data when detecting the

following start of frame (SOF) packet.

D+/D−

2.5 V (Typ.)

0 V

Internal Reset

Ready for Setup

SOF

Ready for Playback

SEL1 (Pin 9)

Attach

(Connect to USB Bus)

Bus Reset

Set Configuration

SOF

SOF

BPZ

Bus Idle

3.3 V

(Typ.)

5 V = VBUS

(Typ.)

1st Audio Data

2nd Audio Data

VDD (Pin 27)

SSPND

VOUTL

VOUTR

700

µs

Device Setup

1 ms

Figure 35. Attach After Power-On