LM4681 National Semiconductor, LM4681 Datasheet - Page 6

• Manufacturer Part Number: LM4681
• Description: Stereo CLASS D Audio Power Amplifier
• Manufacturer: National Semiconductor

www.national.com
I
Headphone Control
Logic Controls
2
Table 4 )
Register
Register
Address
Volume
C/SPI Interface Controls
Control
Control
Mode
(See
I
2
C
Logic Level (SEL, pin 21)
B7
HP Sense Pin (HPSEL, pin 22)
1
0
1
0
1
B6
X
1
0
1 (V
0
DD
B5
)
0
0
0
B4
V4
1
X
B3
V3
X
1
6
B2
V2
X
0
Output Stage Configuration
I
2
C/SPI Select
Class D Amps inactive
SPI mode
I
Class D Amps Active
2
C mode
Active
Mute
ADR
B1
V1
0
Shutdown
Active
B0
V0
0
0