The PCM9211 is a complete analog and digital front-end for today's multimedia players and recorders

PCM9211

Manufacturer Part NumberPCM9211
DescriptionThe PCM9211 is a complete analog and digital front-end for today's multimedia players and recorders
ManufacturerTexas Instruments
PCM9211 datasheet
 


Specifications of PCM9211

Jitter(ps)50Sampling Rate(max)(khz)216
Power Supply(v)4.5-5.5 for Analog ,2.9-3.6 for DIXAdc Resolution(bits)24
Adc Sample Rate (ksps)96Control ModeSPI, I2C, Hardware
InputsPCM,S/PDIF, ADCOutputPCM,S/PDIF
Operating Temperature Range(c)-40 to 85Pin/package48LQFP
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PCM9211
SBAS495 – JUNE 2010
DIR: Auto Source Selector for Main Output and AUX Output
The AUTO source selector is an automatic system that selects the DIR or ADC output based on specific DIR
conditions set by Register 26h. The AUTO source selector is integrated in both the Main Port and the AUX
output separately.
The typical behavior for the AUTO source selector is shown in
setting for Register 26h. In this case, only Register 26h/AUNLOCK is selected.
Non-Biphase
RXINx
Built-in PLL
Unlock
Status
XTI Status
CLKST
ERROR
SCKO, BCK,
XTI (ADC) Source
LRCK
DOUT
ADC Source
Figure 30. Typical Behavior for AUTO Source Selector
When the DIR is unlocked, the ADC output is automatically routed to the Main Output Port.
Polarity of the CLKST signal is configured by Register 22h/CLKSTP. The default is active low, which means that
clock source either changes from DIR to ADC, or from ADC to DIR.
If the DIR is locked, then the DIR output is routed to the Main Output Port automatically after t
period, the output port is muted. t
CLKST1
providing that an XTI clock of 24.576 MHz is applied.
If the DIR loses its lock a subsequent time, the ADC output is routed to the Main Output Port automatically after
t
. Once again, the output port is muted during this time. t
XTIWT
23h/XTIWT[1:0].
The auto source selector can be triggered by the following changes in the DIR (Register 26h is used to select
which variable to use as the trigger):
DIR error (discussed earlier in
DIR: Errors and
Out-of-range sampling frequency
Non-PCM data
When the Validity flag in the S/PDIF stream is '1'
When the PLL is unlocked (default)
38
Submit Documentation Feedback
Figure
30. This example is the default register
Biphase
Lock
Normal Operation
t
CLKST1
DIR Source
MUTE
DIR Source
can be configured using Register 23h/ERRWT[1:0]. t
can be configured using Register
XTIWT
Interrupts; configured by Register 25h)
Product Folder Link(s):
PCM9211
www.ti.com
Non-Biphase
Unlock
t
CLKST2
t
XTIWT
XTI (ADC) Source
MUTE
ADC Source
. During that
CLKST1
is 50 ms,
CLKST2
Copyright © 2010, Texas Instruments Incorporated