CODEC Motherboard Manual Version 1.3
Page 43 of 66
April 12, 2016
CODEC Motherboard
20 Analog Inputs for NAU8822
The analog inputs connect via passive components to pins on the daughter card. All paths are
AC coupled, and passive components are typically transparent (such as zero-ohm resistors and
RF bypass capacitors) at audio frequencies. Some paths may also pass through a jumper
selection as outlined in this documentation.
In most cases, the analog inputs may be used intuitively without the need to know further details
of the actual path through the EVB. The EVB schematic is included and readily available if
further detailed understanding is needed.
Figure 25: ANALOG INPUTS
Jack
Name
Connector
Daughter
card
Pin
Jumper
To
Connect
Function and
Signal Name / Device Pin Number
on NAU8822
J1
Line In
RCA jack - top
RCA jack - bottom
H1,3
H1,6
None
None
Left Line Level Input:
LLIN: Pin #3
Right Line Level Input:
RLIN, Pin #6
J2
Phono Right
RCA jack - top
RCA jack - bottom
H1,5
H1,4
J10: 2-3
J12: 2-3
Right Inverting Mic Input: RMICN, Pin #5
Right non-Inverting Mic In: RMICP, Pin #4
J3
Phono Left
RCA jack - top
RCA jack - bottom
H1,2
H1,1
J11: 2-3
J14: 2-3
Left Inverting Mic Input:
LMICN, Pin #2
Left non-Inverting Mic In: LMICP, Pin #1
J4
Auxin
RCA jack - top
RCA jack - bottom
H4,3
H4,4
None
None
Left Auxiliary Line Input:
LAUXIN, Pin #19
Right Auxiliary Line Input: RAUXIN, Pin #20
J12
Stereo Mic /
Right Mic
3.5mm jack - tip
3.5mm jack - ring
3.5mm jack - sleeve
H1,4
H1,1
H1,5
J13: 1-2
Link1=on
J10: 1-2
Right non-Inverting Mic In: RMICP, Pin #4
Left non-Inverting Mic In: LMICP, Pin #1
Right Inverting Mic Input: RMICN, Pin #5
J16
Left Mic
3.5mm jack - tip
3.5mm jack - ring
3.5mm jack - sleeve
H1,1
None
H1,2
J14: 1-2
None
J11: 1-2
Left non-Inverting Mic In: LMICP, Pin #1
No connection
Left Inverting Mic Input:
LMICN, Pin #2
Default factory configuration highlighted in color
Table 3: ANALOG INPUTS
