NAU8812EVB Nuvoton Technology Corporation of America, NAU8812EVB Datasheet - Page 90

• Manufacturer Part Number: NAU8812EVB
• Description: BOARD EVAL FOR NAU8812
• Manufacturer: Nuvoton Technology Corporation of America
• Series: emPowerAudio™r

Specifications of NAU8812EVB

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Location
Location
emPowerAudio
Datasheet Revision 2.0
0x4E
Bit
0x4F MANOUTEN SBUFH
Addr
Addr
0
2
3
4
5
6
Bit
3
4
5
6
7
8
13.19.
13.20.
READ ONLY BIT
Digital Mute function of the DAC
READ ONLY BIT
Analog Mute function applied to DAC
READ ONLY BIT
Logic controlling the Noise Gate
READ ONLY BIT
High voltage detection circuit monitoring
VDDSPK voltage
Select observation point used by DAC
output Automute feature
Peak limiter indicator
D8
If MANUOUTEN = 1, use this bit to
control Auxout1 output tie-off
resistor switch
If MANUOUTEN = 1, use this bit to
control left speaker output Tie-off
resistor switch
If MANUOUTEN = 1, use this bit to
control left speaker output Tie-off
resistor switch
If MANUOUTEN = 1, use this bit to
control bypass switch around 1.0x
non-boosted output Tie-off buffer
amplifier
If MANUOUTEN = 1, use this bit to
control bypass switch around 1.5x
boosted output Tie-off buffer
amplifier
Enable direct control over output
Tie-off resistor switching
0
D8
AUTOMUTE CONTROL AND STATUS READ REGISTER
Output Tie-off Direct Manual Control REGISTER
™
Bit Description
Bit Description
D7
0
D7
AMTCTRL HVDET NSGATE
SBUFL SNSPK
D6
D6
D5
D5
SMOUT
SPSPK
SNSPK
SBUFL
SBUFH
MANOUTEN
Page 90 of 109
FASTDEC
DMUTE
AMUTE
NSGATE
HVDET
AMTCTRL
Bit Name
Bit Name
SPSPK
D4
D4
Below 87.5% of full scale
Digital gain greater than zero
Automute Disabled
Signal is greater than the noise
gate threshold and ALC gain
can change
VDDSPK logic switch voltage
threshold measured as 4.0Vdc
or Less
Automute operates on data at
the input to the DAC digital
attenuator (default)
Tie-off resistor switch for MOUT
output is forced open
Tie-off resistor switch for
SPKOUTP speaker output is
forced open
Tie-off resistor switch for
SPKOUTN speaker output is
forced open
Normal automatic operation of
bypass switch
Normal automatic operation of
bypass switch
Ignore Register 0x4F bits to
control input Tie-off
resistor/buffer switching
AMUTE
SMOUT
D3
D3
0
DMUTE
0
D2
D2
0
Bit Value
Bit Value
D1
0
D1
0
Above 87.5% of full scale
Digital gain is zero either by
.- Direct setting
.- Softmute function
Automute Enabled
Signal is less than the noise
gate threshold and ALC gain is
held constant
VDDSPK logic switch voltage
threshold measured as 4.0Vdc
or Greater
Automute operates on data at
the DACIN input pin
Tie-off resistor switch for
MOUT output is forced
closed
Tie-off resistor switch for
SPKOUTP speaker output
is forced closed
Tie-off resistor switch for
SPKOUTN speaker output
is forced closed
Bypass switch in closed
position when output buffer
amplifier is disabled
Bypass switch in closed
position when output buffer
amplifier is disabled
Use Register 0x4F bits to
override automatic Tie-off
resistor/buffer switching
NAU8812
January 2011
FTDEC
D0
D0
0
1
1
Default
Default
0x000
0x000