ADAV4601 System Design Document
Confidential Information
Rev.1 August 2009
Analog Devices
Page 72
Bit No.
Bit Name
Description
Default
Bits[7:0]
Reserved
Always write as 0 if writing to this register.
00000000
Address 0x0105 Main Delay Register (Default: 0x0000)
Table 14.
Bit No.
Bit
Name
Description
Default
Bits[15:13]
Reserved
Always write as 0 if writing to this register.
000
Bits[12:0]
Main
delay
These register bits are used to specify the lip synchronization delay for
the main channel.
0000000000000
0x0000 = 20.83 µs (1 sample delay at 48 kHz)
0x0001 = 20.83 µs (1 sample delay)
0x0002 = 41.66 µs (2 sample delay)
…
0x1C20 = 150 ms (7200 samples delay)
Address 0x0106 Automatic Volume Control (Default: 0x350C)
Table 15.
Bit No.
Bit Name
Description
Default
Bits[15:12]
AVC maximum
gain
Used to control the maximum gain in the range of 0 dB to 15 dB. This is
the maximum gain
that can be applied to the input signal in order to reach the desired
output level.
0011
0x0 = 15 dB
0x1 = 14 dB
0x2 = 13 dB
0x3 = 12 dB
0x4 = 11 dB
0x5 = 10 dB
...
0xF = 0 dB
Bits[11:8]
AVC decay time
Used to control the decay time in the range of 20 ms to 12 sec. The
decay time
corresponds to the time required for the output to reach the desired
level.
0101
0x0 = 20 ms
0x1 = 100 ms
0x2 = 200 ms
0x3 = 500 ms
0x4 = 1 sec
0x5 = 2 sec
0x6 = 3 sec
0x7 = 4 sec
0x8 = 5 sec
0x9 = 6 sec
0xA = 7 sec
0xB = 8 sec
0xC = 9 sec
0xD = 10 sec
Содержание ADAV4601
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