lm4547 National Semiconductor Corporation, lm4547 Datasheet - Page 16

• Manufacturer Part Number: lm4547
• Description: Codec With National Sound
• Manufacturer: National Semiconductor Corporation

www.national.com
Application Information
Extended Audio ID Register (28h)
This read only register identifies which AC ’97 Extended Au-
dio features are supported. The LM4547 provides support for
Multiple Codec systems. The two MSB’s, ID1 and ID0, show
the current codec configuration as connected via external
pins 45 and 46.
Reserved Registers
Do not write to these registers.
Pin46 (ID1)
connected)
NC (not
DVdd
DVdd
GND
GND
Pin45 (ID0)
connected)
NC (not
DVdd
DVdd
GND
GND
Reg 28h ID1
(Continued)
0
0
0
1
1
Reg 28h ID0
16
0
0
1
0
1
Codec Mode
Secondary 1
Secondary 2
Secondary 3
Primary
Primary