Analog Devices ADAV4601, Документ по проектированию системы

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ADAV4601 System Design Document Confidential Information
Rev.1 August 2009 Analog Devices Page 82
Bit No. Bit Name Description Default
Bits [15:0] Woofer left
balance
control
register[27:0] 0x011B Bits [15:0] = Headphone 1/AUXOUT 4 left balance
control register[15:0] 0000000000000000
Address 0x011C and Address 0x011D Headphone 1/AUXOUT4 Right Balance Control
Registers (Default: 0x0080, 0x0000)
These two registers control the balance for the Right Headphone 1 and AUXOUT 4 output.
The balance control words are 28-bit words in twos complement and a 5.23 format. This means there are five bits to
the left of the decimal point of which the most significant bit is the sign bit.
Table 30.
Bit No. Bit Name Description Default
Bits[15:12] Reserved Always write as 0 if writing to this register. 0000
Bits[11:0] Woofer left balance
control
register[27:0] 0x011C Bits[11:0] = Headphone 1/AUXOUT 4 right
balance
control register[27:16] 000010000000
Bits [15:0] Woofer left balance
control
register[27:0] 0x011D Bits [15:0] = Headphone 1/AUXOUT 4 right
balance
control register[15:0] 0000000000000000
Address 0x011E and Address 0x011F Headphone 1/AUXOUT4 Volume Control Registers
(Default: 0x0080, 0x0000)
These two registers control the volume for the headphone and AUXOUT4 outputs.
The volume control words are 28-bit words in twos complement and a 5.23 format. This means there are five bits to
the left of the decimal point of which the most significant bit is the sign bit.
Table 31.
Bit No. Bit Name Description Default
Bits[15:12] Reserved Always write as 0 if writing to this register. 0000
Bits[11:0] Headphone 1 volume
control[27:0] 0x011E Bits[11:0] = Headphone 1/AUXOUT 4
volume
Bits[27:16] 000010000000
Bits [15:0] Headphone 1 volume
control[27:0] 0x011F Bits [15:0] = Headphone 1/AUXOUT 4
volume
Bits[15:0] 0000000000000000
Address 0x0120 Headphone 1/AUXOUT4 Channel Loudness Register (Default: 0x0000)
Table 32.
Bit No. Bit Name Description Default
Bits[15:7] Reserved Always write as 0 if writing to this register. 000000000
Bits[6:5] Cutoff
frequency These register bits are used to control the cutoff frequency of the
loudness. 00
00b = 10 Hz
01b = 30 Hz
10b = 50 Hz
11b = 70 Hz
Bits[4:0] Loudness level These register bits are used to control the required level of loudness. It
can be
changed in 1 dB steps. 00000