
- •Reference Manual
- •Cyclone II FPGA Starter Development Board
- •Contents
- •About This Manual
- •1. Introduction
- •Overview
- •Hardware Features
- •Software Features
- •Block Diagram
- •JTAG Programming
- •AS Programming
- •Configuration Procedure
- •Configuring the FPGA in JTAG Mode
- •Configuring the EPCS4 Device in AS Mode
- •Cyclone II EP2C20 FPGA
- •Serial Configuration Device and USB Blaster Circuit
- •SRAM
- •SDRAM
- •Flash Memory
- •SD Card Socket
- •Push Button Switches
- •Toggle Switches
- •Clock Inputs
- •Audio CODEC
- •VGA Output
- •Serial Ports
- •Dual 40-Pin Expansion Headers
- •Component List
- •EPCS4
- •VGA Timing
- •VGA Circuit Pin List
- •VGA Circuit Schematic
- •Audio CODEC
- •Audio Circuit Schematic
- •Audio Circuit Pin List
- •Memory
- •SDRAM Schematic and Pin List
- •SRAM Schematic and Pin List
- •Flash Schematic and Pin List
- •Clock Circuit
- •Clock Circuit Schematic
- •Clock Input Pin List
- •Switches
- •Power ON/OFF Switch
- •RUN/PROG Switch
- •Push Button Switches
- •Push Button Switch Schematic
- •Push Button Switch Pin List
- •Toggle Switches
- •Toggle Switch Schematic
- •Toggle Switch Pin List
- •Displays
- •LEDs
- •LED Schematic
- •LED Pin List
- •Seven-Segment Displays
- •Seven-Segment Display Schematic
- •Seven-Segment Display Pin List
- •Connectors
- •USB-Blaster Port
- •Expansion Headers
- •Expansion Header Schematics
- •Expansion Header Pin List
- •SD Card Connector
- •RS-232 Serial Port
- •RS-232 Circuit Schematic
- •RS-232 Serial Circuit Pin List
- •PS/2 Port
- •PS/2 Circuit Schematic
- •PS/2 Serial Circuit Pin List
- •VGA Video Port
- •Audio Ports
- •SMA External Clock Connector
- •Power Supply Connector

Development Board Components
LED Pin List
Table 2–12 lists the FPGA pins assigned to the LEDs.
Table 2–12. LED FPGA Pin Connections
Signal Name |
FPGA Pin |
Description |
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LEDR[0] |
PIN_R20 |
LED Red[0] |
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LEDR[1] |
PIN_R19 |
LED Red[1] |
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LEDR[2] |
PIN_U19 |
LED Red[2] |
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LEDR[3] |
PIN_Y19 |
LED Red[3] |
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LEDR[4] |
PIN_T18 |
LED Red[4] |
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LEDR[5] |
PIN_V19 |
LED Red[5] |
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LEDR[6] |
PIN_Y18 |
LED Red[6] |
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LEDR[7] |
PIN_U18 |
LED Red[7] |
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LEDR[8] |
PIN_R18 |
LED Red[8] |
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LEDR[9] |
PIN_R17 |
LED Red[9] |
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LEDG[0] |
PIN_U22 |
LED Green[0] |
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LEDG[1] |
PIN_U21 |
LED Green[1] |
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LEDG[2] |
PIN_V22 |
LED Green[2] |
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LEDG[3] |
PIN_V21 |
LED Green[3] |
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LEDG[4] |
PIN_W22 |
LED Green[4] |
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LEDG[5] |
PIN_W21 |
LED Green[5] |
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LEDG[6] |
PIN_Y22 |
LED Green[6] |
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LEDG[7] |
PIN_Y21 |
LED Green[7] |
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Seven-Segment Displays
The development board provides four adjacent 7-segment displays, HEX0–HEX3, (Figure 2–16) for reporting numerical values from the FPGA. Each segment connects to an FPGA general-purpose I/O pin. A LOW logic level applied at the pin lights up the segment; a HIGH logic level turns the segment off.
Altera Corporation |
Reference Manual |
2–21 |
October 2006 |
Cyclone II FPGA Starter Development Board |

Development Board Components
Figure 2–16. Seven-Segment Displays
An index from 0 to 6 identifies each segment and its position
(Figure 2–17). The development board does not connect or use the dot in the display.
Figure 2–17. Segment Index and Position
Seven-Segment Display Schematic
Figure 2–18 shows a schematic diagram of the LEDs.
2–22 |
Reference Manual |
Altera Corporation |
Cyclone II FPGA Starter Development Board |
October 2006 |

Development Board Components
Figure 2–18. Seven-Segment Display Schematic Diagram
Seven-Segment Display Pin List
Table 2–13 lists the FPGA pins assigned to the display segments.
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Table 2–13. Seven-Segment Display FPGA Pin Connections (Part 1 of 2) |
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Signal Name |
FPGA Pin |
Description |
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HEX0[0] |
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PIN_J2 |
Seven-Segment segment 0[0] |
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HEX0[1] |
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PIN_J1 |
Seven-Segment segment 0[1] |
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HEX0[2] |
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PIN_H2 |
Seven-Segment segment 0[2] |
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HEX0[3] |
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PIN_H1 |
Seven-Segment segment 0[3] |
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HEX0[4] |
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PIN_F2 |
Seven-Segment segment 0[4] |
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HEX0[5] |
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PIN_F1 |
Seven-Segment segment 0[5] |
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HEX0[6] |
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PIN_E2 |
Seven-Segment segment 0[6] |
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HEX1[0] |
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PIN_E1 |
Seven-Segment segment 1[0] |
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HEX1[1] |
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PIN_H6 |
Seven-Segment segment 1[1] |
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Altera Corporation |
Reference Manual |
2–23 |
||
October 2006 |
|
Cyclone II FPGA Starter Development Board |