wm8400 Wolfson Microelectronics plc, wm8400 Datasheet - Page 40

• Manufacturer Part Number: wm8400
• Description: Wolfson Audioplustm Hi-fi Audio Codec And Power Management Unit For Mobile Multimedia
• Manufacturer: Wolfson Microelectronics plc

WM8400
w
S
Device ID
RW
(0)
These modes are shown in the section below. Terminology used in the following figures:
Table 3 Terminology
Figure 12 2-Wire Serial Control Interface (single write)
Figure 13 2-Wire Serial Control Interface (single read)
Figure 14 2-Wire Serial Control Interface (multiple write using auto-increment)
Figure 15 2-Wire Serial Control Interface (multiple read using auto-increment)
In 2-wire mode, the WM8400 has two possible device addresses, which can be selected using the
NCSADDR pin.
Table 4 2-Wire Control Interface Address Selection
NCSADDR STATE
A
TERMINOLOGY
High
Low
RW
Index
Sr
S
A
P
A
Sr
DEVICE ADDRESS
0011000 (0 x 30h)
0011010 (0 x 34h)
Device ID
ReadNotWrite
RW
(1)
A
Start Condition
DESCRIPTION
Repeated start
Stop Condition
Acknowledge
MSByte Data
0 = Write
1 = Read
A
LSByte Data
PP, April 2009, Rev 3.0
Pre-Production
A
P
40