Specifications

2–64 Chapter 2: Board Components
Statement of China-RoHS Compliance
Cyclone III 3C120 Development Board Reference Manual © March 2009 Altera Corporation
Power Measurement
Eight power supply rails have on-board voltage and current sense capabilities. These
measurements are made using an 8-channel differential A/D converter from Linear
Technology, with a serial data bus connected to the MAX II CPLD.
The MAX II CPLD contains a logic design that continually monitors the power rails
and displays the current in mW on the dedicated four-digit 7-segment display. Rotary
switch SW4 is used to select the power rail being displayed. The sense resistor is large
enough that it can be easily probed by a user to confirm the display results. The
results are also accessible from the FPGA through register access across the FSM bus.
Figure 2–18 illustrates the circuit.
Ta bl e 2–16 on page 2–21 lists the power measurement rails. The Schematic Signal Name
column lists the power rail being measured, and the power pins/devices attached to
the power rail are listed in the Power Pin Name and Description columns.
Statement of China-RoHS Compliance
Ta bl e 2–62 lists hazardous substances included with the kit.
Figure 2–18. Power Measurement Circuit
MAX II Device
SCK
SDI
SDO
CSn
A/D
Load #1
Load #13
Supply #1
R
SENSE
R
SENSE
Power Select
Quad 7-segment
Display
16:1
Analog
Mux
Amp
Supply #13
MAX II Control
DIP Switch
mA vs. mW
Amps vs. Volts
Table 2–62. Table of Hazardous Substances’ Name and Concentration Notes (1), (2) (Part 1 of 2)
Part Name Lead (Pb)
Cadmium
(Cd)
Hexavalent
Chromium
(Cr6+)
Mercury
(Hg)
Polybrominated
biphenyls (PBB)
Polybrominated
diphenyl Ethers
(PBDE)
Cyclone III development board X* 0 0 0 0 0
12-V power supply 0 0 0 0 0 0
Type A-B USB cable 0 0 0 0 0 0