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MAX97000 Datasheet(PDF) 23 Page - Maxim Integrated Products

Part No. MAX97000
Description  Audio Subsystem with Mono Class D Speaker and Class H Headphone Amplifier
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
Logo MAXIM - Maxim Integrated Products

MAX97000 Datasheet(HTML) 23 Page - Maxim Integrated Products

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Audio Subsystem with Mono Class D
Speaker and Class H Headphone Amplifier
23
I2C Registers
Nine internal registers program the MAX97000. Table
1 lists all the registers, their addresses, and power-on-
reset states. Register 0xFF indicates the device revision.
Write zeros to all unused bits in the register table when
updating the register, unless otherwise noted. Tables 2
through 7 describe each bit.
Table 1. Register Map
Table 2. Input Register
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
ADDRESS
DEFAULT
R/W
STATUS
Input Gain
INADIFF
INBDIFF
PGAINA
PGAINB
0x00
0x00
R/W
Headphone
Mixers
HPLMIX
HPRMIX
0x01
0x00
R/W
Speaker Mixer
0
0
0
0
SPKMIX
0x02
0x00
R/W
Headphone
Left
ZCD
SLEW
HPLM
HPLVOL
0x03
0x00
R/W
Headphone
Right
LPGAIN
0
HPRM
HPRVOL
0x04
0x00
R/W
Speaker
FFM
SPKM
SPKVOL
0x05
0x00
R/W
Reserved
0
0
0
0
0
0
0
0
0x06
0x00
R/W
Limiter
THDCLP
0
0
0
THDT1
0x07
0x00
R/W
Power
Management
SHDN
LPMODE
SPKEN
0
HPLEN
HPREN
SWEN
0x08
0x01
R/W
Charge Pump
0
0
0
0
0
0
CPSEL
FIXED
0x09
0x00
R/W
REVISION ID
Rev ID
REV
0xFF
0x00
R
REGISTER
BIT
NAME
DESCRIPTION
0x00
7
INADIFF
Input A Differential Mode. Configures the input A channel as either a mono differential
signal (INA = INA2 - INA1) or as a stereo signal (INA1 = left, INA2 = right).
0 = Stereo single-ended
1 = Differential
6
INBDIFF
Input B Differential Mode. Configures the input B channel as either a mono differential
signal (INB = INB2 - INB1) or as a stereo signal (INB1 = left, INB2 = right).
0 = Stereo single-ended
1 = Differential
5
PGAINA
Input A Preamp Gain. Set the input gain to maximize output signal level for a given input
signal range to improve the SNR of the system. PGAINA = 111 switches to a trimmed 20kI
feedback resistor for external gain setting.
4
VALUE
000
001
010
011
100
101
110
111
LEVEL (dB)
-6
-3
0
3
6
9
18
External
3


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