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WM8903 Datasheet(PDF) 116 Page - Wolfson Microelectronics plc

Part # WM8903
Description  Ultra Low Power CODEC for Portable Audio Applications
PDF  178 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8903 Datasheet(HTML) 116 Page - Wolfson Microelectronics plc

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WM8903
Production Data
w
PD, Rev 4.5, June 2012
116
Figure 57 Control Interface Register Write
The sequence of signals associated with a single register read operation is illustrated in Figure 58.
Figure 58 Control Interface Register Read
The Control Interface also supports other register operations, as listed above. The interface protocol
for these operations is summarised below. The terminology used in the following figures is detailed in
Table 75.
Note that multiple write and multiple read operations are supported using the auto-increment mode.
This feature enables the host processor to access sequential blocks of the data in the WM8903
register map faster than is possible with single register operations.
TERMINOLOGY
DESCRIPTION
S
Start Condition
Sr
Repeated start
A
Acknowledge (SDIN Low)
A
¯¯
Not Acknowledge (SDIN High)
P
Stop Condition
R/W
¯¯
ReadNotWrite
0 = Write
1 = Read
[White field]
Data flow from bus master to WM8903
[Grey field]
Data flow from WM8903 to bus master
Table 75 Control Interface Terminology
Figure 59 Single Register Write to Specified Address



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