PSoC® 4100S Pioneer Kit Guide, Doc. # 002-14067 Rev. *C
40
Figure A-5. Schematics of Current Measurement Switch
The following methods are supported to measure current consumption of the PSoC 4100S device.
■
Measurement using ammeter when powered from USB connector or battery
When the board is powered through the USB connector or battery, turn off all the switches of SW7
and connect an ammeter between P4.VDD and VDD test points, as shown in
Figure A-6
.
Figure A-6. Current Measurement when Powered from USB Connector or Battery
Note:
While measuring the current consumption of the PSoC 4100S device, remove R118 from the
board to get accurate current measurement values.
NO LOAD
NO LOAD
Power Monitoring
P1
SWITCH(S7) SETTINGS
ON
P2
P3
OFF OFF
ON
OFF
10 ohm
ON
OFF OFF
Load
Default
(short)
P4
P5
1 ohm
OFF OFF
ON
ON
ON
ON
By default P5 is ON.
To enable PSoC 5LP Power Monitoring, P1 and P2 should be ON,
P5 should be OFF and the corresponding resistor (1 ohm/ 10 ohm)
should be connected (P3/P4).
To enable external power monitoring, Ammeter should be
connected to TP1 and TP2. P1, P2...P5 should be OFF.
OFF
Note: To avoid leakage
during battery operation
remove R20
VDD
VTARG
P4_VDD
P4_VDD
P
5
LP
0_6
P
5
LP
3_7
P
5
LP
3_1
P
5
LP
0_5
3
3
3
3
3
SW 7
5 POLE DIP SW
1
1
2
2
3
3
10
10
9
9
8
8
4
4
5
5
7
7
6
6
TP2
RED
R20
ZERO
TP1
RED
R8
9.76 Ohm
R4
ZERO
R16
0.86 Ohm
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