Chapter 4. Measuring Power On The Cyclone Iii Starter Board; Introduction - Altera Cyclone III FPGA User Manual

Introduction

Table 4–1. Four Input Button Functionality
Button
1
2
3
4
Table 4–2. LEDs Power State (Frequency)
Displays
Frequency
Altera Corporation
July 2010
One of the main features of the Cyclone
consumption. You can measure the power of the 3C25 device on the
Cyclone III starter board under various conditions with an example
design provided with the kit.
The power example design allows you to control the amount of logic
utilized in the FPGA, the clock frequency, the number of I/Os being used,
and measure the effect on the power to the Cyclone III device. Because the
Cyclone III starter board has only four buttons and four LEDs, interaction
with the board is minimal as defined below.
Table 4–1 describes the functionality of the four input buttons that control
the power example design.
FPGA Pin Type
F1 Reset
F2 Toggle
A10 Toggle
B10 Press and Hold
Tables 4–2 and 4–3
current power state.
LEDs
MSB
LED2
Core Version a.b.c variable
4. Measuring Power on the
Cyclone III Starter Board
®
Resets the demo to the beginning, node
i_nrst.
Advances the example design to the next higher
frequency, node i_nfreq_next.
Advances the example design to the next higher
resource utilization, node_i_nperc_next.
Enables the outputs to toggle, node
i_noutput_ena.
describe how the LEDs indicate the example design's
LSB
LED1
III device is its low power
Description
Clock Frequency
State
(MHz)
00 0
01 33
10 67
11 100
Preliminary
4–1