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WM8326 Datasheet(PDF) 41 Page - Wolfson Microelectronics plc

Part # WM8326
Description  Processor Power Management Subsystem
PDF  255 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8326 Datasheet(HTML) 41 Page - Wolfson Microelectronics plc

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Production Data
WM8326
w
PD, June 2012, Rev 4.0
41
The sequence of signals associated with a single register write operation is illustrated in Figure 7.
Figure 7 Control Interface 2-wire (I2C) Register Write
The sequence of signals associated with a single register read operation is illustrated in Figure 8.
Figure 8 Control Interface 2-wire (I2C) 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 11.
Note that, for multiple write and multiple read operations, the auto-increment option must be enabled.
This feature is enabled by default; it is described in Table 12 below.
TERMINOLOGY
DESCRIPTION
S
Start Condition
Sr
Repeated start
A
Acknowledge (SDA Low)
A
¯¯
Not Acknowledge (SDA High)
P
Stop Condition
R/W
¯¯
ReadNotWrite
0 = Write
1 = Read
[White field]
Data flow from bus master to WM8326
[Grey field]
Data flow from WM8326 to bus master
Table 11 Control Interface Terminology
Figure 9 Single Register Write to Specified Address



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