Altera Cyclone III Development Board - Manual (Page 39)

Chapter 2: Board Components 2–29
General User Interfaces
© March 2009 Altera Corporation Cyclone III 3C120 Development Board Reference Manual
DDR2 User-Defined LEDs
Each channel of DDR2 memory has an LED near the respective DDR2 device. There is
no board-specific function for these LEDs; however, they are labeled
DDR2TOP_ACTIVE
and DDR2BOT_ACTIVE on the silkscreen and are intended to be
illuminated when each respective memory channel is being accessed. The LEDs are
driven by the Cyclone III device.
Table 2–31 lists the DDR2 user-defined LED board reference number, schematic signal
name, and corresponding Cyclone III device pin number.
Table 2–32 lists the memory user-defined LED component reference and
manufacturing information.
Table 2–30. HSMC User-Defined LED Component Reference and Manufacturing Information
Board Reference Description Manufacturer
Manufacturing
Part Number
Manufacturer
Website
D12-D15 Green LED, 1206,
SMT, clear lens, 2.1 V Lumex, Inc. SML-LX1206GC-TR www.lumex.com
Table 2–31. DDR2 User—Defined LEDs
Board Reference
Schematic
Signal Name
Cyclone III Device
Pin Number
D11 DDR2TOP_ACTIVE User defined but labeled DDR2TOP_ACTIVE on
the silkscreen for DDR2TOP memory channel.
D16 DDR2BOT_ACTIVE User defined but labeled DDR2BOT_ACTIVE in
silkscreen for DDR2BOT memory channel.
Table 2–32. Memory User-Defined LED Component Reference and Manufacturing Information
Board Reference Description Manufacturer
Manufacturing
Part Number
Manufacturer
Website
D11 and D16 Green LED, 1206,
SMT, clear lens 2.1 V Lumex, Inc. SML-LX1206GC-TR www.lumex.com