wm8918 Wolfson Microelectronics plc, wm8918 Datasheet - Page 114

• Manufacturer Part Number: wm8918
• Description: Ultra Low Power Dac For Portable Audio Applications
• Manufacturer: Wolfson Microelectronics plc

WM8918
Figure 62 Control Interface Register Read
Figure 63 Single Register Write to Specified Address
Figure 64 Single Register Read from Specified Address
Figure 65 Multiple Register Write to Specified Address using Auto-increment
w
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 77.
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 WM8918
register map faster than is possible with single register operations.
Table 77 Control Interface Terminology
TERMINOLOGY
[White field]
[Grey field]
R/W ¯ ¯
A ¯ ¯
Sr
S
A
P
ReadNotWrite
Data flow from bus master to WM8918
Data flow from WM8918 to bus master
Not Acknowledge (SDA High)
Acknowledge (SDA Low)
DESCRIPTION
Start Condition
Repeated start
Stop Condition
0 = Write
1 = Read
PD, Rev 4.0, September 2010
Production Data
114