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WM8281ECS/R Scheda tecnica(PDF) 173 Page - Cirrus Logic

Il numero della parte WM8281ECS/R
Spiegazioni elettronici  Low Power Audio System with Ambient Noise Cancellation and Echo Cancellation
PDF  392 Pages
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Produttore elettronici  CIRRUS [Cirrus Logic]
Homepage  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

WM8281ECS/R Scheda tecnica(HTML) 173 Page - Cirrus Logic

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WM8281
Rev 4.0
173
PARAMETER
CODE
DESCRIPTION
COMMENTS
LAIF
Logical Address, Incoming Framer
NCi
Number of Incoming Framer Clock Cycles
NCo
Number of Outgoing Framer Clock Cycles
PN
Port Number
Note that the Port Numbers of the WM8281 SLIMbus paths are
register-configurable, as described in Table 52.
PR
Presence Rate
Note that the Presence Rate must be the same as the Sample
Rate selected for the associated WM8281 SLIMbus path.
RF
Root Frequency
WM8281 supports the following RF codes as Active Framer:
1h - 24.576MHz
2h - 22.5792MHz
All codes are supported when WM8281 is not the Active Framer.
RT
Restart Time
WM8281 supports the following RT codes:
0h -Fast Recovery
2h - Unspecified Delay
When either of these values is specified, the WM8281 will
resume toggling the CLK line within four cycles of the CLK line
frequency.
SD
Segment Distribution
Note that any data channels that are assigned the same
SAMPLE_RATE_n or ASYNC_SAMPLE_RATE_n value must
also be assigned the same Segment Interval.
SL
Segment Length
SM
Subframe Mode
All SM codes are supported. Note that, if subframe mode 0, 16,
or 21 is selected, there is a risk of bus synchronisation being lost
following a RECONFIGURE_NOW() message, and audio/data
channels may be corrupted. It is recommended to use other
subframe modes in order to avoid this occurrence. If subframe
mode 0, 16, or 21 is selected, suitable error handling should be
incorporated to detect any loss of data.
TID
Transaction ID
TP
Transport Protocol
WM8281 supports the following TP codes for TX channels:
0h - Isochronous Protocol
1h - Pushed Protocol
WM8281 supports the following TP codes for RX channels:
0h - Isochronous Protocol
2h - Pulled Protocol
VS
Value Slice
VU
Value Update
Table 51 SLIMbus Parameter Support



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