AD1986 데이터 시트보기 (PDF) - Analog Devices
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AD1986 Datasheet PDF : 52 Pages
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Preliminary Technical Data
AD1986
Register
JS4–7H
Interrupt
Mode Select
x
Function
This bit selects the audio interrupt implementation path (for JS4 to 7). This bit does not generate an interrupt, rather it
steers the path of the generated interrupt.
JS4 to 7H
Interrupt Mode—JS4 to 7
0
Bit 0 SLOT 12 (modem interrupt)
Default
1
Slot 6 valid bit (MIC ADC interrupt)
Reserved
Default: 0
MISC CONTROL BITS 3 (REGISTER 0x7A)
Reg Name
D15 D14
D13
D12 D11 D10
D9
D8
D7 D6 D5 D4
D3 D2 D1 D0 Default
0x7A Misc Control Bits 3 JSINVB HPSEL1 HPSEL0 LOSEL JSINVA LVREF 2 LVREF1 LVREF 0 x
x
x
LOHPEN GPO MMIX x
x
0x0000
Table 65.
Register
MMIX
GPO
LOHPEN
LVREF [2:0]
(Line In
VREF_OUT)
Function
Used in conjunction with the OMS [2:0] (0x74 D10:08), MS (0x20 D08), and 2CMIC (0x76 D06) bits to mix the microphone
selector left/right channels. If the MMIX bit is set, the 2CMIC and MS bits are ignored.
MMIX
Function
Default
0
Microphone channels are not mixed
Default
1
The left/right channels from the microphone selector are mixed
Sets the state of the GPO pin
GPO
Function
0
GPO pin is at logic low (DVSS)
Default
1
GPO pin is at logic high (DVDD)
Enables the headphone drive on the LINE_OUT pins. Disabling the headphone drive is the same as powering it down (see
the PR6 bit (0x26 D14)).
LOHPEN
Function
0
LINE_OUT headphone drive is disabled
Default
1
LINE_OUT headphone drive is enabled
Sets the voltage/state of the LINE_IN 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.
LINE_IN VREF_OUT Setting
LVREF [2:0]
5.0 AVDD
3.3 V AVDD
000
Hi-Z
Hi-Z
Default
001
2.25 V
2.25 V
010
0V
0V
100
3.70 V
2.25 V
LOSEL
(LINE_OUT
Amplifiers
Input Select)
JSINVA
Jack Sense
Invert
This bit allows the LINE_OUT output amplifiers to be driven by the mixer or the surround DACs. The main purpose for this is
to allow swapping of the frontand surround channels to make better use of the SURR/HP_OUT output amplifiers. This bit
should normally be used in tandem with the HPSEL bit (see below).
LOSEL
LINE_OUT Select
0
LINE_OUT amplifiers are driven by the
Default
analog mixer outputs
1
LINE_OUT amplifiers are driven by the
surround DAC
SENSE_A: Select the style of switches used on the audio jacks connected to Sense A.
JSINVA
Jack Sense Invert—SENSE_A
0
SENSE_A configured for normally-
Default
open (NO) switches
1
SENSE_A configured for normally-closed
(NC) switches
Rev. 0 | Page 41 of 52
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