WM8990ECS/RV Wolfson Microelectronics, WM8990ECS/RV Datasheet - Page 127

• Manufacturer Part Number: WM8990ECS/RV
• Description: Audio CODECs Stereo CODEC w.Class AB/D speaker driver
• Manufacturer: Wolfson Microelectronics

Specifications of WM8990ECS/RV

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

w
Production Data
S
Device ID
RW
(0)
These modes are shown in the section below. Terminology used in the following figures:
Table 76 Terminology
Figure 82 2-Wire Serial Control Interface (single write)
Figure 83 2-Wire Serial Control Interface (single read)
Figure 84 2-Wire Serial Control Interface (multiple write using auto-increment)
Figure 85 2-Wire Serial Control Interface (multiple read using auto-increment)
In 2-wire mode, the WM8990 has two possible device addresses, which can be selected using the
CSB/ADDR pin.
Table 77 2-Wire Control Interface Address Selection
CSB/ADDR STATE
A
TERMINOLOGY
High
Low
RW
Index
Sr
S
A
P
A
Sr
DEVICE ADDRESS
0011010 (0 x 34h)
0011011 (0 x 36h)
Device ID
ReadNotWrite
RW
(1)
A
Start Condition
DESCRIPTION
Repeated start
Stop Condition
Acknowledge
MSByte Data
0 = Write
1 = Read
A
PD, March 2009, Rev 4.0
LSByte Data
WM8990
A
P
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