PCM2704 Datasheet, PDF (26/33 Pages) Texas Instruments – STEREO AUDIO DAC WITH USB INTERFACE, SINGLE-ENDED HEADPHONE OUTPUT AND S/PDF OUTPUT

PCM2704, PCM2705
PCM2706, PCM2707
SLES081A − JUNE 2003 – REVISED MAY 2004
www.ti.com
Play, Stop, and Detach Sequence
When host finishes or aborts the playback, the PCM2704/5/6/7 stops the playing after last audio data has played.
Suspend and Resume Sequence
The PCM2704/5/6/7 enters the suspend state after the USB bus has been in a constant idle state for approximately
5 ms. While the PCM2704/5/6/7 is in the suspend state, SSPND flag (pin 27 for PCM2704/5, pin 11 for PCM2706/7)
is asserted. The PCM2704/5/6/7 wakes up immediately when detecting the non-idle state on the USB bus.
VBUS
ÓÓÓÓÓÓÓÓÓÓÓÓÓÓÓÓÓÓÓÓÓÓÓÓ ÓÓ ÓÓ _D+/D–
Audio Data Audio Data
Last Audio Data
SOF
SOF
SOF
SOF
SOF
VOUTL
VOUTR
1 ms
ÓÓÓÓÓÓ _D+/D−
SSPND
Figure 29. Play, Stop, and Detach
Idle
ÓÓÓÓÓÓ
5 ms
Suspend
VOUTL
VOUTR
Active
2.5 ms
Figure 30. Suspend and Resume
Active
Detach
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