Cirrus Logic CDB42L73 - Manual (Page 9)

DS882DB1 9
CDB42L73
JUMPER PIN
BLOCK
PURPOSE POSITION FUNCTION SELECTED
J50 +5 V +5 V main supply
select
[*] +5V EXT
USB
+5 V supply source from J1
+5 V supply source from USB
J10 VA CS42L73 VA supply
source select
VA EXT
[*] +1.8 V LDO
+1.8 V BUCK
CS42L73 VA supply = J3
CS42L73 VA supply= 1.8 V derived from LDO
CS42L73 VA supply= 1.8 V derived from switching buck
regulator
J11 VL CDB42L73 VL supply
source select
(see also J25)
VL EXT
[*] +1.8 V LDO
+1.8 V BUCK
CDB42L73 VL supply = J4
CDB42L73 VL supply = 1.8 V derived from LDO
CDB42L73 VL supply = 1.8 V derived from switching buck
regulator
J12 VCP CS42L73 VCP sup-
ply source select
VCP EXT
[*] +1.8 V LDO
+1.8 V BUCK
CS42L73 VCP supply = J5
CS42L73 VCP supply = 1.8 V derived from LDO
CS42L73 VCP supply = 1.8 V derived from switching buck
regulator
J13 VD_FILT CS42L73 VD_FILT
supply source select
VD_FILT_EXT
[*] NORM
CS42L73 digital core supply = J6
CS42L73 digital core supply = internally generated
J14 VP CS42L73 VP supply
source select
VP EXT
[*] +5 V EXT
BATT
CS42L73 VP supply = J7
CS42L73 VP supply = J1
CS42L73 VP supply = J49
J25 BOARD VL CDB42L73 board
peripheral and
CS42L73 VL common
supply toggle
+1.8 V LDO
[*] NORMAL
Board peripheral VL is supplied by 1.8 V LDO while
CS42L73 VL = J11
Board peripheral VL and CS42L73 VL = J11
J27 IVA CS42L73 VA current
measurement
[*] Shunted
Open
0.1  current measurement resistor is shorted
0.1  current measurement resistor is in series with
CS42L73 VA, allowing user to measure current draw of VA
supply for power consumption calculations.
J42 IVL CS42L73 VL current
measurement
[*] Shunted
Open
0.1  current measurement resistor is shorted
0.1  current measurement resistor is in series with
CS42L73 VL, allowing user to measure current draw of VL
supply for power consumption calculations.
J28 IVCP CS42L73 VCP cur-
rent measurement
[*] Shunted
Open
0.1  current measurement resistor is shorted
0.1  current measurement resistor is in series with
CS42L73 VCP, allowing user to measure current draw of
VCP supply for power consumption calculations.
J40 IVD_FILT CS42L73 current
measurement
[*] Shunted
Open
0.1  current measurement resistor is shorted
0.1  current measurement resistor is in series with
CS42L73 VD_FILT, allowing user to measure current draw
of digital core supply for power consumption calculations.
J41 IVP CS42L73 current
measurement
[*] Shunted
Open
0.1  current measurement resistor is shorted
0.1  current measurement resistor is in series with
CS42L73 VP, allowing user to measure current draw of VP
supply for power consumption calculations.
J15 1.8V BUCK EN +1.8 V switching buck
regulator enable/dis-
able
[*] DIS
EN
Disables the +1.8 V switching buck regulator
Enables the +1.8 V switching buck regulator
J8 1.8V BUCK
SOURCE
+1.8 V switching buck
regulator power sup-
ply source
BATT
[*] +5V
+1.8V switching buck regulator power supply source = J49
+1.8V switching buck regulator power supply source = J50