ADAV4601 System Design Document Confidential Information
Rev.1 August 2009 Analog Devices Page 73
Bit No. Bit Name Description Default
0xE = 11 sec
0xF = 12 sec
Bits[7:4] AVC maximum
attenuation
Used to control the maximum attenuation in the range of −18 dB to
−3 dB in
+1 dB steps. This is the maximum attenuation that can be applied to
the input
signal in order to reach the desired output level.
0000
0x0 = −18 dB
0x1 = −17 dB
…
0xE = −4 dB
0xF = −3 dB
Bits[3:0] AVC output level Used to control the required output level of the AVC block in the range of
−3 dBFS to
−18 dBFS in −1 dB steps. If the input signal is greater than the output
level that has
been set by these bits, the gain is automatically reduced.
1100
0x0 = −18 dBFS
0x1 = −17 dBFS
…
0xC = −6 dBFS
0xD = −5 dBFS
0xE = −4 dBFS
0xF = −3 dBFS
Address 0x0107 Main Sever Band EQ Control Register (Default: 0x0018)
Table 16.
Bit No. Bit
Name
Description Default
Bits[15:11] Reserved Always write as 0 if writing to this register. 00000
Bits[10:8] Main EQ
band
These register bits control the frequency band of the equalizer. 000
0x0 = 120 Hz
0x1 = 200 Hz
0x2 = 500 Hz
0x3 = 1200 Hz
0x4 = 3000 Hz
0x5 = 7500 Hz
0x6 = 12000 Hz
Bits[7:6] Reserved Always write as 0 if writing to this register. 00
Bits[5:0] Main EQ
gain
These register bits are used to control the required gain of the equalizer. The
gain of the equalizer
is changed in 0.5 dB steps.
011000
0x00 = +12 dB
0x01 = +11.5 dB
…
0x0A = +7 dB
…
0x18 = 0 dB
…
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