AD1986 Analog Devices, AD1986 Datasheet - Page 34

• Manufacturer Part Number: AD1986
• Manufacturer: Analog Devices

AD1986
EQ DATA REGISTER (REGISTER 0x62)
This read/write register is used to transfer EQ biquad coefficients into memory. The register data is transferred to, or retrieved from the
address pointed by the BCA bits in the EQ CNTRL register (0x60). Data will only be written to memory, if the EQM bit (Register 0x60
bit 15) is asserted.
Reg
0x62
Table 58.
Register
CFD [15:0]
(Coefficient
Data)
MISC CONTROL BITS 2 (REGISTER 0x70)
Reg
0x70
Table 59.
Register
CVREF [2:0]
(C/LFE VREF_OUT
Control)
JSMAP
(Jack Sense Mapping)
MMDIS
(Mono Mute Disable)
MVREF [2:0]
(MIC VREF_OUT)
x
Name
EQ
Data
Name
Misc Control
Bits 2
D15
CFD15
Function
The biquad coefficients are fixed point format values with 16 bits of resolution. The CFD15 bit is the MSB and the CFD0 bit is
the LSB.
D15
x
D14
CFD14
D14
x
Function
Sets the voltage/state of the C/LFE VREF_OUT signal. VREF_OUT is used to power microphone style devices
plugged into the connected jack circuitry. The VREF_OUT pin must be connected to both the left and right
channels through external resistors to function properly. Selections other than those defined are invalid and
should not be programmed.
CVREF [2:0]
000
001
010
100
The AD1986 supports two different methods of mapping the JACK_SENSE_A/B resistor tree to bits JS [7:0]. Use
these bits to change from the default mapping to the alternate method.
JSMAP
0
1
Disables the automatic muting of the MONO_OUT pin by jack sense events (see advanced jack sense bits JS [3:0]
(0x76 D [05:04], 0x72 D [05:04]).
MMDIS
0
1
Sets the voltage/state of the microphone VREF_OUT signal. VREF_OUT is used to power microphone style devices
plugged into the connected jack circuitry. The VREF_OUT pin must be connected to both the left and right
channels through external resistors to function properly. Selections other than those defined are invalid and
should not be programmed.
MV
000
001
010
100
Reserved.
REF
D13
CFD13
D13
x
[2:0]
D12
MVREF
2
D12
CFD12
D11
CFD11
D11
MVREF
1
5.0 AV
Hi-Z
2.25 V
0V
3.70 V
Function
Default Jack Sense mapping
Alternate Jack Sense mapping
Function
Automute can occur
Automute disabled
5.0 AV
Hi-Z
2.25 V
0 V
3.70 V
D10
CFD10
D10
MVREF
0
DD
DD
Rev. 0 | Page 34 of 52
D9
CFD9
D9
x
MIC_1/2 VREF_OUT Setting
C/LFE VREF_OUT Setting
D8
CFD8
D8
x
D7
MMDIS
3.3 V AV
Hi-Z
2.25 V
0V
2.25 V
3.3 V AV
Hi-Z
2.25 V
0 V
2.25 V
D7
CFD7
D6
x
D6
CFD6
DD
DD
D5
JSMAP
D5
CFD5
Preliminary Technical Data
D4
CVREF
2
D4
CFD4
D3
CFD3
D3
CVREF
1
D2
CFD2
D2
CVREF
0
D1
CFD1
Default
Default
Default
Default
Default
Default: 0
D1
x
CFD0
D0
D0
x
Default
0x0000
Default
0xxxxx