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MAX97000 Datasheet(PDF) 25 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
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MAX97000 Datasheet(HTML) 25 Page - Maxim Integrated Products

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Audio Subsystem with Mono Class D
Speaker and Class H Headphone Amplifier
25
Volume Control
Table 4. Volume Control Registers
REGISTER
BIT
NAME
DESCRIPTION
0x03
7
ZCD
Zero-Crossing Detection. Determines whether zero-crossing detection is used on all
volume control changes to reduce clicks and pops. Disabling zero-crossing detection
allows volume changes to occur immediately.
0 = Enabled
1 = Disabled
6
SLEW
Volume Slewing. Determines whether volume slewing is used on all volume control
changes to reduce clicks and pops. When enabled, volume changes cause the
MAX97000 to ramp through intermediate volume settings whenever a change to the
volume is made. If ZCD = 1, slewing occurs at a rate of 0.2ms per step. If ZCD = 0, slew
time depends on the input signal. Write a 1 to this bit to disable slewing and implement
volume changes immediately. This bit also activates soft-start at power-on and soft-stop
and power-off.
0 = Enabled
1 = Disabled
5
HPLM
Left Headphone Mute
0 = Unmuted
1 = Muted
4
HPLVOL
Left Headphone Volume
3
VALUE
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08
0x09
0x0A
0x0B
0x0C
0x0D
0x0E
0x0F
LEVEL (dB)
-64
-60
-56
-52
-48
-44
-40
-37
-34
-31
-28
-25
-22
-19
-16
-14
VALUE
0x10
0x11
0x12
0x13
0x14
0x15
0x16
0x17
0x18
0x19
0x1A
0x1B
0x1C
0x1D
0x1E
0x1F
LEVEL (dB)
-12
-10
-8
-6
-4
-2
-1
0
1
2
3
4
4.5
5
5.5
6
2
1
0


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