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WM8351 Datasheet(PDF) 40 Page - Wolfson Microelectronics plc

Part # WM8351
Description  Wolfson AudioPlus??Stereo CODEC with Power Management
PDF  330 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8351 Datasheet(HTML) 40 Page - Wolfson Microelectronics plc

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WM8351
Production Data
w
PD, April 2012, Rev 4.5
40
The sequence of signals associated with a single register read operation is illustrated in Figure 24.
Figure 24 Control Interface 2-wire 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 2.
TERMINOLOGY
DESCRIPTION
S
Start Condition
Sr
Repeated start
A
Acknowledge
P
Stop Condition
R/W
ReadNotWrite
0 = Write
1 = Read
[White field]
Data flow from bus master to WM8351
[Grey field]
Data flow from WM8351 to bus master
Table 2 Control Interface Terminology
Figure 25 Single Register Write to Specified Address
Figure 26 Single Register Read from Specified Address
Device ID
S
A
Register Address
(0)
A
MSByte Data 0
A
LSByte Data 0
A
RW
Written to 'Register Address'
A
MSByte Data N
A
LSByte Data N
A P
Written to 'Register Address+N'
MSByte Data 1
MSByte Data N-2 A
MSByte Data N-1
A
LSByte Data N-1
Written to 'Register Address+N-1'
Figure 27 Multiple Register Write to Specified Address using Auto-increment



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