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MAX97000 Datasheet(PDF) 25 Page - Maxim Integrated Products |
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MAX97000 Datasheet(HTML) 25 Page - Maxim Integrated Products |
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25 / 33 page 
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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