A-C4E10 Cyclone IV FPGA EP4CE10E22C8N Development Board

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EP4CE10 Device List.jpg

  • 46 Internal SRAM 1KX9 Blocks


24C04 I2C EEPROM[edit]








  • Do not connect power cable if Mini-USB is connected


  • PS/2 keyboard


  • 1/1/1 R/G/B


Mini USB[edit]

  • Do not connect power cable if Mini-USB is connected
  • CH340 USB to serial I/F

J2 - LCD[edit]

  • LCD1602 or LCD12864

I/O Connector[edit]


  • J4 - 2 pin - 3.3V




  • 1x3 shunt
  • LCD Power 3.3V or 5V

J3 - LCD Type Select[edit]

  • 1602/12864 select


DIP Switch[edit]

  • 8 positions


  • Marked nCONFIG




  • Marked DEV-CLR

K5 - Marked DEV-OE[edit]


Ring LEDs[edit]


  • D3-D14 = Ring LEDs
  • D15 - CH340 USB Rx (in to card)
  • D16 - CH340 USB Tx (out of card)

RTS/CTS Rework[edit]

  • Add hardware handshake but lose 2 LEDs
    • LEDs have no series resistors and count on the output drive from the FPGA (bad idea)
      • Measured 1.8V on LED while lit
  • Board uses CH340 USB to Serial I/F

CH340G Pinout.PNG

  • Hardware handshakes are in the CH340G IC but not wired to the FPGA pins on the board
    • This is an issue for slower serial emulations which need to throttle the host CPU
  • Remove LEDs D13, D14

P1736-RTS-CTS Mod.jpg

  • Add wire D14 (top side) to U6-9 (CTS) (FPGA to CH340)
    • FPGA PIN_69
  • Add wire D13 (top side) to U6-14 (RTS) (CH340 to FPGA )
    • FPGA PIN_70

Programming the FPGA EEPROM[edit]

  • In Quartus II select File
  • Convert Programming File
  • Configuration Device = EPCS16
  • Mode = Active Serial
  • Programming File Type: *.jic
  • Advanced = Check both Disables...
  • Select Flash Loader
  • Add Device = Cyclone IV E and EP4CE10
  • Select SOF Data
  • Select Add File and select the .sof file
  • Generate
  • In Tools, Programmer
  • Add file and select the .jic file
  • Select Program/Configure
  • Takes a while to program
  • Press nConfig button below VGA

Pin List[edit]

# Clock, Reset
set_location_assignment PIN_23 -to i_clk
set_location_assignment PIN_86 -to i_n_reset
# Serial Port
set_location_assignment PIN_114 -to i_rxd
set_location_assignment PIN_113 -to o_txd
set_location_assignment PIN_70 -to i_cts
set_location_assignment PIN_69 -to o_rts
# PS/2 Keyboard
set_location_assignment PIN_11 -to i_ps2Clk
set_location_assignment PIN_10 -to i_ps2Data
# Buzzer
set_location_assignment PIN_141 -to o_BUZZER
# Switches
set_location_assignment PIN_87 -to i_pbutton[0]
set_location_assignment PIN_91 -to i_pbutton[2]
set_location_assignment PIN_90 -to i_pbutton[1]
set_location_assignment PIN_58 -to i_DipSw[0]
set_location_assignment PIN_59 -to i_DipSw[1]
set_location_assignment PIN_60 -to i_DipSw[2]
set_location_assignment PIN_64 -to i_DipSw[3]
set_location_assignment PIN_65 -to i_DipSw[4]
set_location_assignment PIN_66 -to i_DipSw[5]
set_location_assignment PIN_67 -to i_DipSw[6]
set_location_assignment PIN_68 -to i_DipSw[7]
# LEDs
set_location_assignment PIN_72 -to o_LED[0]
set_location_assignment PIN_73 -to o_LED[1]
set_location_assignment PIN_74 -to o_LED[2]
set_location_assignment PIN_80 -to o_LED[3]
set_location_assignment PIN_83 -to o_LED[4]
set_location_assignment PIN_84 -to o_LED[5]
set_location_assignment PIN_77 -to o_LED[6]
set_location_assignment PIN_76 -to o_LED[7]
set_location_assignment PIN_75 -to o_LED[8]
set_location_assignment PIN_71 -to o_LED[9]
# Video
set_location_assignment PIN_144 -to o_Vid_Blu
set_location_assignment PIN_1 -to o_Vid_Grn
set_location_assignment PIN_2 -to o_Vid_Red
set_location_assignment PIN_142 -to o_Vid_hSync
set_location_assignment PIN_143 -to o_Vid_vSync
# Seven Segment LEDs
set_location_assignment PIN_128 -to o_Anode_Act[0]
set_location_assignment PIN_129 -to o_Anode_Act[1]
set_location_assignment PIN_132 -to o_Anode_Act[2]
set_location_assignment PIN_133 -to o_Anode_Act[3]
set_location_assignment PIN_135 -to o_Anode_Act[4]
set_location_assignment PIN_136 -to o_Anode_Act[5]
set_location_assignment PIN_137 -to o_Anode_Act[6]
set_location_assignment PIN_138 -to o_Anode_Act[7]
set_location_assignment PIN_127 -to o_LED7Seg[0]
set_location_assignment PIN_126 -to o_LED7Seg[1]
set_location_assignment PIN_125 -to o_LED7Seg[2]
set_location_assignment PIN_124 -to o_LED7Seg[3]
set_location_assignment PIN_121 -to o_LED7Seg[4]
set_location_assignment PIN_120 -to o_LED7Seg[5]
set_location_assignment PIN_119 -to o_LED7Seg[6]
set_location_assignment PIN_115 -to o_LED7Seg[7]