Texas Instruments PCM2706 Evaluation Module PCM2706EVM-U PCM2706EVM-U 데이터 시트
제품 코드
PCM2706EVM-U
D+ / D-
SSPND
V
L
V
R
OUT
OUT
Idle
Active
Active
2.5 ms
5 ms
Suspend
Detach
1 ms
V
BUS
D+ / D
-
V
L
V
R
OUT
OUT
SOF
SOF
SOF
SOF
SOF
Audio Data
Audio Data
Last Audio Data
SBFS036A – AUGUST 2011 – REVISED JULY 2012
Play, Stop, and Detach Sequence
When the host finishes or aborts playback, the PCM2704C/5C/6C/7C stop playing after the last audio data output
is complete.
is complete.
illustrates the play, stop, and detach sequence.
Figure 32. Play, Stop, and Detach Sequence
Suspend and Resume Sequence
The PCM2704C/5C/6C/7C enter a suspended state after the USB bus has been in a constant idle state for
approximately 5 ms. While the PCM2704C/5C/6C/7C are in this suspended state, the SSPND flag (pin 27 for the
PCM2704C/5C, pin 11 for the PCM2706C/7C) is asserted. The PCM2704C/5C/6C/7C wake up immediately
when detecting a non-idle state on the USB bus.
approximately 5 ms. While the PCM2704C/5C/6C/7C are in this suspended state, the SSPND flag (pin 27 for the
PCM2704C/5C, pin 11 for the PCM2706C/7C) is asserted. The PCM2704C/5C/6C/7C wake up immediately
when detecting a non-idle state on the USB bus.
shows the operating sequence for the suspend and
resume process.
Figure 33. Suspend and Resume
Copyright © 2011–2012, Texas Instruments Incorporated
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