lm48557tlx National Semiconductor Corporation, lm48557tlx Datasheet - Page 11

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lm48557tlx

Manufacturer Part Number
lm48557tlx
Description
Mono, Bridge-tied Load, Ceramic Speaker Driver With I2c Volume Control And Reset
Manufacturer
National Semiconductor Corporation
Datasheet
*RESERVED bits are Don't Cares and are ignored by the device. The state of the RESERVED bits does not affect device operation.
*RESERVED bits are Don't Cares and are ignored by the device. The state of the RESERVED bits does not affect device operation.
B0:B5
BIT
BIT
B0
B1
B2
B3
B4
B5
B6
B7
B6
B7
Register
Address
Volume
Control
Control
Device
Name
Mode
RESERVED*
RESERVED*
RESERVED*
RESERVED*
RESERVED*
TESTMODE
VOL0:VOL5
REGISTER
REGISTER
ADDRESS
ADDRESS
NAME
SHDN
MUTE
NAME
B7
B7
0
1
1
Control Table
See Volume
VALUE
VALUE
B6
B6
0
0
1
X
X
X
X
0
1
0
1
0
0
X
1
TABLE 4. Volume Control Registers
TABLE 3. Mode Control Registers
VOL5
TABLE 2. Control Registers
Shutdown mode
Normal operation
Normal operation
Device mute, A
Unused, Set to 0
Unused, Set to 0
Set B4 to 0. B4 = 1 enables TESTMODE. See
TESTMODE section.
Unused, Set to 0
Unused, Set to 0
Set to 0 to access Mode Control register
Controls amplifier gain/attenuation
Unused, Set to 0
Set to 1 to access Volume Control register
TABLE 1. Device Address
B5
B5
0
0
VOL4
11
B4
B4
0
1
V
= -90dB.
DESCRIPTION
DESCRIPTION
VOL3
B3
B3
1
0
VOL2
B2
B2
1
0
MUTE
VOL1
B1
B1
1
DEFAULT
DEFAULT
SETTING
SETTING
B0 R/W
SHDN
VOL0
B0
0
0
1
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0
0
0
0
0
0
0
0
0

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