AD1986AJSTZ Analog Devices Inc, AD1986AJSTZ Datasheet - Page 37

• Manufacturer Part Number: AD1986AJSTZ
• Description: IC CODEC HD AUDIO AC'97 48LQFP
• Manufacturer: Analog Devices Inc
• Series: SoundMAX®r
• Type: Audio Codec '97, HDr

Specifications of AD1986AJSTZ

• Data Interface: Serial
• Resolution (bits): 20 b
• Number Of Adcs / Dacs: 2 / 6
• Sigma Delta: No
• Dynamic Range, Adcs / Dacs (db) Typ: 85 / 91
• Voltage - Supply, Analog: 4.5 V ~ 5.5 V
• Voltage - Supply, Digital: 2.97 V ~ 3.63 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

EQ CONTROL REGISTER (REGISTER 0x60)
Register 0x60 is a read/write register that controls equalizer function and data setup. The register also contains the biquad and coefficient
address pointer, which is used in conjunction with the EQ data register (0x78) to set up the equalizer coefficients. The reset default
disables the equalizer function until the coefficients can be properly set up by the software and sets the symmetry bit to allow equal
coefficients for left and right channels.
Reg
0x60
Table 99. Biquad and Coefficient Address Pointer
BCA [5,0]
Table 100.
Register
CHS
(Channel
Select)
SYM
(Symmetry)
EQM
(Equalizer
Mute)
x
Name
EQ
Control
Biquad 0
Biquad 0
Biquad 0
Biquad 0
Biquad 0
Biquad 1
Biquad 1
Biquad 1
Biquad 1
Biquad 1
Biquad 2
Biquad 2
Biquad 2
Biquad 2
Biquad 2
Biquad 3
Biquad 3
Biquad 3
Function
Swaps the blocks that are used for symmetry coefficients. Only valid when the SYM bit is set.
CHS
0
1
When set to 1 this bit indicates that the left and right channel coefficients are equal.
This shortens the coefficients setup sequence since only the left channel coefficients need to be addressed and set up. The
right channel coefficients are simultaneously copied into memory.
SYM
0
1
When set to 1, this bit disables the equalizer function (allows all data to pass through). The reset default sets this bit to 1,
disabling the equalizer function until the biquad coefficients can be properly set.
EQM
0
1
Reserved.
D15
EQM
D14
x
Coef a0
Coef a1
Coef a2
Coef b1
Coef b2
Coef a0
Coef a1
Coef a2
Coef b1
Coef b2
Coef a0
Coef a1
Coef a2
Coef b1
Coef b2
Coef a0
Coef a1
Coef a2
Function
Selects left channel coefficients’ data block
Selects right channel coefficients’ data block
Function
Left and right channels can use different coefficients
Indicates that the left and right channel coefficients are equal
Function
EQ is enabled.
EQ is disabled. Data will pass-through without change.
D13
x
D12
x
BCA [5,0] = 011011
BCA [5,0] = 011010
BCA [5,0] = 011001
BCA [5,0] = 011101
BCA [5,0] = 011100
BCA [5,0] = 100000
BCA [5,0] = 011111
BCA [5,0] = 011110
BCA [5,0] = 100010
BCA [5,0] = 100001
BCA [5,0] = 100101
BCA [5,0] = 100100
BCA [5,0] = 100011
BCA [5,0] = 100111
BCA [5,0] = 100110
BCA [5,0] = 101010
BCA [5,0] = 101001
BCA [5,0] = 101000
D11
x
D10
x
Rev. 0 | Page 37 of 56
D9
x
D8
x
D7
SYM
D6
CHS
D5
BCA5
Biquad 3
Biquad 3
Biquad 4
Biquad 4
Biquad 4
Biquad 4
Biquad 4
Biquad 5
Biquad 5
Biquad 5
Biquad 5
Biquad 5
Biquad 6
Biquad 6
Biquad 6
Biquad 6
Biquad 6
D4
BCA4
Default
Default
Default
Default
Default: 0
Coef b1
Coef b2
Coef a0
Coef a1
Coef a2
Coef b1
Coef b2
Coef a0
Coef a1
Coef a2
Coef b1
Coef b2
Coef a0
Coef a1
Coef a2
Coef b1
Coef b2
D3
BCA3
D2
BCA2
BCA [5,0] = 101100
BCA [5,0] = 101011
BCA [5,0] = 101111
BCA [5,0] = 101110
BCA [5,0] = 101101
BCA [5,0] = 110001
BCA [5,0] = 110000
BCA [5,0] = 110100
BCA [5,0] = 110011
BCA [5,0] = 110010
BCA [5,0] = 110110
BCA [5,0] = 110101
BCA [5,0] = 111001
BCA [5,0] = 111000
BCA [5,0] = 110111
BCA [5,0] = 111011
BCA [5,0] = 111010
D1
BCA1
AD1986A
BCA0
D0
Default
0x8080