Cirrus Logic CDB42L56 - Manual (Page 7)

DS851DB1 7
CDB42L56
Notes:
1. Use headers J7 and J11 to select input signal ground reference (in pseudo-differential mode) as either
the CDB42L56 board ground or the signal ground reference from the external system which the
CDB42L56 receives through the shield of the analog input cable.
2. Resistor modifications are only required if single-ended and pseudo-differential input configurations
need to be used simultaneously on the “A” and “B” inputs of the same analog input channel.
3. Resistor population settings for resistors not shown in the table should be the same as factory defaults.
Figure 35 on page 28 illustrates how the analog inputs are connected and routed. Table 3 on page 19 de-
tails the jumper selections.
1.11 Analog Outputs
The CS42L56 analog outputs can be monitored on RCA jacks J15 and J17 for line and J37 and J38 for
headphone outputs. Additionally, the CS42L56 headphone outputs can also be monitored on stereo head-
phone jack J1 which also allows the user to test the CS42L56’s headphone detect functionality. The
CDB42L56 on-board circuitry drives the headphone detect pin low when a headphone is inserted in J1.
Headers J12 and J4 can be used to select optional 16  or 32  resistive loads for headphone outputs.
Headers J2 and J3 give users the option of receiving filtered or unfiltered outputs on the RCA headphone
output jacks.
Figure 35 on page 28 illustrates how the analog outputs are connected and routed. Table 3 on page 19 pro-
vides details on jumper selections for filtered or unfiltered outputs.
No. Analog Input 1 Analog Input 2 Analog Input 3 Jumper Settings Resistors
to Populate
Resistors to
Unpopulate AIN1A AIN1B AIN2A AIN2B AIN3A AIN3B J19 J20
1. S.E. S.E. S.E. S.E. S.E. S.E. 1-2 2-3 - -
2. S.E. P.Diff. S.E. S.E. - S.E. 2-3 2-3 R86 R12
3. P.Diff. S.E. S.E. S.E. - S.E. 2-3 2-3 R41 R58
4. S.E. S.E. S.E. P.Diff. S.E. - 1-2 1-2 R109 R78
5. S.E. S.E. P.Diff. S.E. S.E. - 1-2 1-2 R51 R43
6.
S.E. P.Diff. P.Diff. S.E. - - 2-3 1-2
R86
R51 R12
R43
7. S.E. P.Diff. S.E. P.Diff. - - 2-3 1-2
R86
R109
R12
R78
8. P.Diff. S.E. S.E. P.Diff. - - 2-3 1-2
R41
R109
R58
R78
9. P.Diff. S.E. P.Diff. S.E. - - 2-3 1-2
R41
R51 R58
R43
10. S.E. S.E. P.Diff. P.Diff. S.E. - 1-2 1-2 - -
11. P.Diff. P.Diff. S.E. S.E. - S.E. 2-3 2-3 - -
12. S.E. P.Diff. P.Diff. P.Diff. - - 2-3 1-2 R86 R12
13. P.Diff. S.E. P.Diff. P.Diff. - - 2-3 1-2 R41 R58
14. P.Diff. P.Diff. S.E. P.Diff. - - 2-3 1-2 R109 R78
15. P.Diff. P.Diff. P.Diff. S.E. - - 2-3 1-2 R51 R43
16. P.Diff. P.Diff. P.Diff. P.Diff. - - 2-3 1-2 - -
Table 1. Analog Input Configuration Jumper and Resistor Settings