max97000 Maxim Integrated Products, Inc., max97000 Datasheet - Page 23

• Manufacturer Part Number: max97000
• Description: Audio Subsystem With Mono Class D Speaker And Class H Headphone Amplifier
• Manufacturer: Maxim Integrated Products, Inc.

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.
Table 1. Register Map
Table 2. Input Register
STATUS
Input Gain
Headphone
Mixers
Speaker Mixer
Headphone
Left
Headphone
Right
Speaker
Reserved
Limiter
Power
Management
Charge Pump
REVISION ID
Rev ID
REGISTER
REGISTER
0x00
Speaker and Class H Headphone Amplifier
INADIFF
LPGAIN
BIT
SHDN
7
6
5
4
3
ZCD
FFM
B7
0
0
0
INADIFF
INBDIFF
PGAINA
NAME
INBDIFF
SLEW
SPKM
Audio Subsystem with Mono Class D
B6
0
0
0
0
THDCLP
LPMODE
HPLMIX
HPLM
HPRM
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
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
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.
B5
VALUE
0
0
0
I
2
000
001
010
011
100
101
110
111
C Registers
PGAINA
SPKEN
B4
0
0
0
LEVEL (dB)
-6
-3
0
3
6
9
18
External
REV
B3
0
0
0
0
SPKVOL
HPLEN
HPRVOL
HPLVOL
B2
0
0
0
Write zeros to all unused bits in the register table when
updating the register, unless otherwise noted. Tables 2
through 7 describe each bit.
HPRMIX
SPKMIX
PGAINB
HPREN
CPSEL
DESCRIPTION
B1
0
0
THDT1
SWEN
FIXED
B0
0
ADDRESS
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08
0x09
0xFF
DEFAULT
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x01
0x00
0x00
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R
23