lm49100gr National Semiconductor Corporation, lm49100gr Datasheet - Page 14

• Manufacturer Part Number: lm49100gr
• Description: Mono Class Ab Audio Subsystem With A True-ground Headphone Amplifier
• Manufacturer: National Semiconductor Corporation

www.national.com
LM49100 Control Tables
The LM49100 is controlled through an I
= 1).
The following bits have added for extra headphone output attenuation:
G
G
G
G
R — Right input signal
L — Left input signal
SD — Shutdown
M — Mono input signal
Modes Control
HP Volume (Gain)
Control
Mono Volume
Control
Left Volume (Gain)
Control
Right Volume (Gain)
Control
L
R
M
HP
Number
— Left channel gain
Output
— Right channel gain
— Mono channel gain
Mode
— Headphone Amplifier gain
10
14
0
1
2
3
4
5
6
7
Gain Select
MC3 MC2
0
0
0
0
0
0
0
0
1
1
0
1
2
3
0
0
0
0
1
1
1
1
0
1
MC1
D7
0
0
1
1
1
0
0
1
1
0
0
1
1
1
1
MC0
0
1
0
1
0
1
0
1
0
0
2
C compatible interface. The I
D6
TABLE 2. Headphone Attenuation Control
0
1
0
1
1
Handsfree Mono Output
TABLE 1. I
2 × (G
2 × (G
2 × (G
2 × (G
2 × (G
TABLE 3. Output Mode Selection
HPVC1
INPUT_MU
0
0
1
1
2 × G
+ G
L
L
L
L
L
× L + G
× L + G
× L + G
× L + G
× L + G
D5
TE
SD
SD
SD
M
SD
1
0
0
1
2
M
C Control Register Table
× M)
× M
R
R
R
R
R
× R)
× R)
× R)
× R)
14
× R
MV4
RV4
LV4
D4
1
0
2
C chip address is 0xF8 (ADR pin = 0) or 0xFAh (ADDR pin
G
G
HP
HP
HPVC0
Right HP Output
× (G
× (G
G
G
G
G
0
1
0
1
HP
HP
HP
HP
MC3
MV3
RV3
LV3
D3
0
R
R
× (G
× (G
× (G
× (G
× R + G
× R + G
SD
SD
SD
SD
M
M
R
R
× M)
× R)
× R)
× M)
HPR_SD
M
M
MC2
MV2
RV2
LV2
× M)
× M)
D2
G
G
HP
HP
HPVC1
Left HP Output
MC1
G
G
MV1
RV1
× (G
× (G
LV1
G
G
D1
Gain, dB
HP
HP
HP
HP
−12
−18
−24
× (G
L
× (G
L
0
× (G
× (G
× L + G
× L + G
SD
SD
SD
SD
M
M
L
L
× M)
× M)
× L)
× L)
HPVC0
MC0
MV0
RV0
LV0
M
M
D0
× M)
× M)