ADAV4601 System Design Document Confidential Information
Rev.1 August 2009 Analog Devices Page 85
Address 0x0123 Main Beeper Control Register (Default: 0x0005)
This register controls the main beeper block.
Table 35.
Bit No. Bit Name Description Default
Bits[15:12] Reserved Always write as 0 if writing to this register. 0000
Bits[11:8] Volume
gain
These register bits control the volume of the beeper in the range of −38 dB to
−10 dB in +2 dB steps.
0000
0x0 = Off
0x1 = −38 dB
0x2 = −36 dB
...
0xE = −12 dB
0xF = −10 dB
Bits[7:6] Reserved Always write as 0 if writing to this register. 00
Bits[5:0] Frequency These register bits control the frequency of the beeper in the range of 0 Hz
(beeper off ) to
11812.5 Hz in 187.5 Hz steps.
000101
0x00 = 0 Hz
0x01 = 187.5 Hz
0x02 = 375 Hz
0x03 = 562.5 Hz
0x04 = 750 Hz
0x05 = 937.5 Hz
0x06 = 1125 Hz
…
0x2E = 8625 Hz
0x2F = 8812.5 Hz
Address 0x0124 Low-Pass Filter (Subchannel) Register (Default: 0x0003)
This register is used to control the low pass filter cutoff frequency for the subwoofer channel.
Table 36.
Bit No. Bit Name Description Default
Bits[15:4] Reserved Always write as 0 if writing to this register. 000000000000
Bits[3:0] LPF sub
cutoff
These register bits control the cutoff frequency of the low-pass filter of
the subwoofer
channel. The range of values is 60 Hz to 340 Hz in 20 Hz steps.
0011
0x0 = Off
0x1 = 60 Hz
0x2 = 80 Hz
0x3 = 100 Hz
0x4 = 120 Hz
...
0xE = 320 Hz
0xF = 340 Hz
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