AD1986A Analog Devices, AD1986A Datasheet - Page 40

• Manufacturer Part Number: AD1986A
• Description: HD Audio SoundMAX Codec
• Manufacturer: Analog Devices

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AD1986A
Register
JSMT [2,0]
(JS Mute
Enable
selector)
JS0DMX
(JS0 Down-
Mix Control
Enable)
JS1DMX
(JS1 Down-
Mix Control
Enable)
JSSPRD
(JS Spread
control
enable)
x
Table 104. Jack Sense Mute Selections (JSMT)
REF
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
4
JS1
OUT (0)
OUT (0)
IN (1)
IN (1)
OUT (0)
OUT (0)
IN (1)
IN (1)
OUT (0)
OUT (0)
IN (1)
IN (1)
OUT (0)
OUT (0)
IN (1)
IN (1)
OUT (0)
OUT (0)
IN (1)
IN (1)
Function
These three bits select and enable the jack sense muting action. See Table 104.
This bit enables JS0 to control the down-mix function. This function allows a digital mix of 6-channel audio into 2-channel
audio. The mix can then be routed to the stereo LINE_OUT or HP_OUT jacks. When this bit is set to 1, JS0 = 1 will activate the
down-mix conversion. See the DMIX description in Register 0x76. The DMIX bits select the down-mix implementation type
and can also force the function to be activated.
JS0DMX
0
1
This bit enables JS1 to control the down-mix function (see the JS0DMx description above). When this bit is set to 1, JS1 = 1
will activate the down-mix conversion.
JS1DMX
0
1
This bit enables the 2-channel to 6-channel audio spread function when JSs are active (Logic State 1). Note that the SPRD bit
can also force the Spread function without being gated by the jack senses. Please see this bit’s description in Register 0x76
for a better understanding of the Spread function.
JSSPRD
0
1
Reserved.
JS0
OUT (0)
IN (1)
OUT (0)
IN (1)
OUT (0)
IN (1)
OUT (0)
IN (1)
OUT (0)
IN (1)
OUT (0)
IN (1)
OUT (0)
IN (1)
OUT (0)
IN (1)
OUT (0)
IN (1)
OUT (0)
IN (1)
JSMT2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
JSMT1
Function
JS0 does not affect down mix
JS0 = 1 activates the 6- to 2-channel down mix
Function
JS1 does not affect down-mix
JS1 = 1 activates the 6- to 2-channel down-mix
Function
JS1 does not affect spread
J10 = 1 activates spread
JSMT0
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
HP
OUT
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
FMUTE
FMUTE
ACTIVE
ACTIVE
**
**
**
**
ACTIVE
ACTIVE
ACTIVE
ACTIVE
Rev. 0 | Page 40 of 56
LINE
OUT
ACTIVE
ACTIVE
ACTIVE
ACTIVE
FMUTE
FMUTE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
**
**
**
**
FMUTE
ACTIVE
FMUTE
FMUTE
C/LFE
OUT
ACTIVE
ACTIVE
ACTIVE
ACTIVE
FMUTE
FMUTE
ACTIVE
ACTIVE
FMUTE
FMUTE
ACTIVE
ACTIVE
**
**
**
**
FMUTE
ACTIVE
FMUTE
FMUTE
SURR
OUT
ACTIVE
ACTIVE
ACTIVE
ACTIVE
FMUTE
FMUTE
ACTIVE
ACTIVE
FMUTE
FMUTE
ACTIVE
ACTIVE
**
**
**
**
FMUTE
ACTIVE
FMUTE
FMUTE
MONO
OUT
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
FMUTE
FMUTE
ACTIVE
ACTIVE
FMUTE
FMUTE
**
**
**
**
ACTIVE
FMUTE
FMUTE
FMUTE
NOTES
JS0 and JS1 ignored
JS0 no mute action
LINE_OUT + SURR_OUT +
C/LFE
STANDARD 6 CHAN CONFIG
HP_OUT and LINE_OUT
HP_OUT + SURR_OUT + C/LFE
Standard six Channel
Configuration no swap
**Reserved
JS0 = 0 and JS1 = 0
enables MONO
JS1 = 1 enabled
FRONT only
JS0 = 1 and JS1 = 0
enables all rear
6 CHAN CONFIG with front
jack wrap back
JS1 mutes mono and enables
JS0 no mute action, SWAPPED
JS1 mutes mono and enables
Default
Default
Default
Default: 0