NAU8812EVB Nuvoton Technology Corporation of America, NAU8812EVB Datasheet - Page 73

• 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

(determines level at which the limiter starts to operate)
The Notch Filter is enabled by setting NFCEN[7] address (0x1B) bit to HIGH. The coefficients, A
converted to 2‟s complement numbers to determine the register values. A
bits NFCA0[13:0] and NFCA1[13:0]. Since there are four register of coefficients, a Notch Filter Update bit is provided
so that the coefficients can be updated simultaneously. NFCU[8] is provided in all registers of the Notch Filter
coefficients but only one bit needs to be toggled for LOW - HIGH - LOW for an update. If any of the NFCU[8] bits are
left HIGH then the Notch Filter coefficients will continuously update. An example of how to calculate is provided in
the Notch Filter section.
emPowerAudio
Datasheet Revision 2.0
DAC Limiter Programmable signal threshold level
B2
Bit
0x1B
0x1C
0x1D
0x1E
0
0
0
0
1
1
1
0
1
Addr
DAC Digital Limiter
13.5. NOTCH FILTER REGISTERS
DACLIMTHL[3:0]
DACLIMEN[8]
NFCU
NFCU
NFCU
NFCU
D8
Disabled
Enabled
™
To
B1
0
0
1
1
0
0
1
NFCEN
D7
0
0
0
B0
0
1
0
1
0
1
1
D6
Threshold
(dB)
-1
-2
-3
-4
-5
-6
D5
Page 73 of 109
D4
NFCA0[13:7]
NFCA1[13:7]
NFCA0[6:0]
NFCA1[6:0]
D3
DAC Limiter volume Boost (can be used as a
B3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
0
and A
D2
stand alone volume Boost when
DACLIMBST[3:0]
1
B2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
are represented by the register
To
DACLIMEN=0)
D1
B1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
NAU8812
January 2011
0
and A
B0
D0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
1
, should be
Reserved
Default
0x000
0x000
0x000
0x000
Boost
(dB)
+10
+11
+12
+1
+2
+3
+4
+5
+6
+7
+8
+9
0