DK-EMB-3C120N Altera, DK-EMB-3C120N Datasheet - Page 37

• Manufacturer Part Number: DK-EMB-3C120N
• Description: KIT DEV EMB CYCLONE III EDITION
• Manufacturer: Altera
• Series: Cyclone® IIIr
• Type: FPGAr

Specifications of DK-EMB-3C120N

• Contents: Board, Cables, CD(s), USB-Blaster™, Power Supply
• Architecture: PLD/FPGA
• Silicon Manufacturer: Altera
• Core Architecture: FPGA
• Core Sub-architecture: Cyclone
• Silicon Core Number: EP3C
• Silicon Family Name: Cyclone III
• Rohs Compliant: Yes
• For Use With/related Products: EP3C120
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 544-2589

Chapter 7: Power Measurement
Changing the Design Example
Changing the Design Example
September 2010 Altera Corporation
Calculating Power
1
To obtain the power P in watts, measure the voltage across the sense resistors, V
and calculate the nominal power as follows:
If
then
Equation 7–1.
where
Voltage measurements on the DMM should increase as frequency and resource
utilization increases according to
The development kit includes source code for the Cyclone III power design example
so you can use it as a starting point for your own measurements.
The design example uses 19 stamp.v modules, each with 8 outputs, for a total of
152 output pins. It assigns the pins selected as outputs to the HSMC connectors J8 and
J9.
To change the number of outputs, modify the design example and assign the pins
appropriately.
Power should track linearly with frequency and percentage resources. If you observe
superlinear power measurements, some temperature issue may be the cause.
V
I
V
R
V
SENSE
SENSE
SENSE
SUPPLY
SUPPLY
= Current through the sense resistor
= Sense resistor value in
= Voltage measured across the sense resistor
= FPGA supply voltage
is 1.2 V for the FPGA core and 2.5 V for FPGA I/O.
=
VI
=
V
SUPPLY
Table 7–2
Table
×
I
SENSE
7–5.
and
=
Table 7–3 on page
V
-----------------------------------------------
SUPPLY
Cyclone III FPGA Development Kit User Guide
R
SENSE
×
V
SENS
7–2.
SENSE
7–5
,