Key Components Description and Operation
UG0557 User Guide Revision 4.0
11
4
Key Components Description and Operation
This section describes the key component interfaces of the SmartFusion2 Advanced Development Kit.
For device datasheets, go to
http://www.microsemi.com/products/fpga-soc/design-resources/dev-
.
4.1
Powering Up the Board
The SmartFusion2 Advanced Development Board is powered using a 12 V external DC jack
(12P0V_Ext), as shown in the following figure.
To power up the board:
1.
Connect the 12 V power supply brick to the
J42
jumper to supply power to the board.
2.
Switch ON the
SW7
power supply switch.
Figure 4 •
Powering Up the Board
4.2
Current Measurement
This section provides information about current sensing in various modes.
4.2.1
1.0 V or 1.2 V Current Sensing for Normal Operation
For applications that require current measurement, high-precision operational amplifier circuitry (U59
with gain 100) is provided on the board to measure the output voltage at the
TP17
test point.
The following steps describe how to measure the core power.
1.
Measure the output voltage (V
OUT
) at TP17.
2.
I = (V
OUT
/5).
3.
Core power consumed (P) = (1.2 V) × I.
For example, when the voltage measured across TP17 is 0.5 V, the core power consumed is 0.12 W.
9B([W
9B,1
9
6:
-
(1$%/(B)7