AD1986ABSTZ datasheet(38/56 Pages) AD

38 / 56 page

AD1986A

Rev. 0 | Page 38 of 56

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

Name

D15

D14

D13

D12

D11

D10

Default

0x62

Data

CFD15

CFD14

CFD13

CFD12

CFD11

CFD10

CFD9

CFD8

CFD7

CFD6

CFD5

CFD4

CFD3

CFD2

CFD1

CFD0

0xxxxx

Table 101.

Function

CFD [15:0]

(Coefficient

Data)

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.

MISC CONTROL BITS 2 (REGISTER 0x70)

Reg

Name

D15

D14

D13

D12

D11

D10

Default

0x70

Misc Control

Bits 2

MVREF

MMDIS

JSMAP

CVREF

0x0000

Table 102.

Function

CVREF [2:0]

(C/LFE VREF_OUT

Control)

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.

C/LFE VREF_OUT Setting

CVREF [2:0]

5.0 AVDD

Default

000

Hi-Z

Default

001

2.25 V

010

0 V

100

3.70 V

JSMAP

(Jack Sense Mapping)

The AD1986A 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

Function

Default jack sense mapping

Default

Alternate jack sense mapping

MMDIS

(Mono Mute Disable)

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

Function

Automute can occur

Default

Automute disabled

MVREF [2:0]

(MIC VREF_OUT)

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.

MIC_1/2 VREF_OUT Setting

MVREF [2:0]

5.0 AVDD

000

Hi-Z

Default

001

2.25 V

010

0 V

100

3.70 V

Reserved.

Default: 0

AD1986ABSTZ Datasheet(PDF) 38 Page - Analog Devices

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