RETRO-EP4CE15

Features

• Purchased FPGA Card
  • QMTECH EP4CE15 Board
  • Altera Cyclone IV EP4CE15F23C8N FPGA
  • Winbond W9825C6KH-6 4M X 4 Banks x 16 bits SDRAM
  • 3 Switches
  • 2 LEDs
  • DC power jack
  • Power supply
• Alternate FPGA Board
  • QMTECH Altera Intel FPGA Core Board Cyclone V CycloneV 5CEFA2F23 SDRAM - Alternate FPGA card Cyclone V
  • On-Board FPGA: 5CEFA2F23;
  • On-Board FPGA external crystal frequency: 50MHz;
  • 5CEFA2F23 has rich RAM resource up to 1,760Kb;
  • 5CEFA2F23 has 25K logic cells;
  • On-Board Micron MT25QL128A SPI Flash, 16M bytes for user configuration code;
  • On-Board Winbond 32MB SDRAM, W9825G6KH-6;
  • On-Board 3.3V power supply for FPGA by using MP2315 wide input range DC/DC;
  • 5CEFA2F23 core board has two 64p, 2.54mm pitch headers for extending 108 user IOs. All 108 user IOs are precisely designed with length matching;
  • 5CEFA2F23 core board has 3 user switches;
  • 5CEFA2F23 core board has 2 user LEDs;
  • 5CEFA2F23 core board has JTAG interface, by using 10p, 2.54mm pitch header;
  • 5CEFA2F23 core board PCB size is: 6.7cm x 8.4cm;
  • Default power source for board is: 1A@5V DC, the DC header type: DC-050, 5.5mmx2.1mm;
• 1MB SRAM
  • For banked use in CP/M
• VGA connector
  • 6 bit video (2:2:2)
• PS/2 connector
• FTDI USB to serial converter
  • Micro USB
• FT230XS FTDI chip
  • Tx/Rx LEDs
• SD or SDHC Card
• 2x6 Header
• 50-pin I/O Connector

FPGA Resources

• 56 1Kx9 RAM blocks

FPGA Boards

EP4CE15 FPGA Resources

• Power LED - D4
• User LED - D5 - FPGA Pin E4
• KEY0 - SW1 - FPGA Pin W13
• KEY1 - SW2 - FPGA Pin Y13
• nCONFIG - SW3
• JP5 - 5V

EP4CE15 Card Mechanicals

5CEFA2F23 FPGA Resources

• Power LED - D4 (On when 5V is applied)
• User LED - LED_D5 - FPGA Pin_D17
• KEY0 - SW1 - FPGA Pin_AB13
• RESET_N- SW2 - FPGA PIN_V16
• nCONFIG - SW3 - FPGA PIN_A4
• JP5 - 5V

5CEFA2F23 Card Mechanicals

Connectors

Connector Mapping

• Both the EP4 and 5F FPGA cards have the same connectors but they go to different FPGA pins
  • This is the mapping between the two cards

U7

U8

Using EP4CE15 FPGA Card

J1 - I/O Connector (EP4CE15 FPGA Card pin numbers)

U8 - FPGA to RETRO-EP4CE15 card (EP4CE15 FPGA Card pin numbers)

U7 - FPGA to RETRO-EP4CE15 card (EP4CE15 FPGA Card pin numbers)

Connectors - Using 5CEFA2F23 FPGA Card

J1 - I/O Connector (5CEFA2F23 FPGA Card pin numbers)

U8 - FPGA to RETRO-EP4CE15 (5CEFA2F23 FPGA Card pin numbers) card

U7 - FPGA to RETRO-EP4CE15 card (5CEFA2F23 FPGA Card pin numbers) =

SRAM (EP4CE15 FPGA pin numbers) J7 = U7

• n_sRamCS - J7-19 - PIN_F1
• n_sRamWE - J7-29 - PIN_B4
• n_sRamOE - J7-16 - PIN_J2
• sramData[0] - J7-21 - PIN_E1
• sramData[1] - J7-23 - PIN_C1
• sramData[2] - J7-25 - PIN_B1
• sramData[3] - J7-27 - PIN_B3
• sramData[4] - J7-26 - PIN_B2
• sramData[5] - J7-24 - PIN_C2
• sramData[6] - J7-22 - PIN_D2
• sramData[7] - J7-20 - PIN_F2
• sramAddress[0] - J7-17 - PIN_H1
• sramAddress[1] - J7-15 - PIN_J1
• sramAddress[2] - J7-13 - PIN_M1
• sramAddress[3] - J7-11 - PIN_N1
• sramAddress[4] - J7-9 - PIN_P1
• sramAddress[5] - J7-10 - PIN_P2
• sramAddress[6] - J7-12 - PIN_N2
• sramAddress[7] - J7-14 - PIN_M2
• sramAddress[8] - J7-18 - PIN_H2
• sramAddress[9] - J7-28 - PIN_A3
• sramAddress[10] - J7-30 - PIN_A4
• sramAddress[11] - J7-32 - PIN_C3
• sramAddress[12] - J7-34 - PIN_A5
• sramAddress[13] - J7-36 - PIN_A6
• sramAddress[14] - J7-38 - PIN_A7
• sramAddress[15] - J7-40 - PIN_A8
• sramAddress[16] - J7-37 - PIN_B7
• sramAddress[17] - J7-35 - PIN_B6
• sramAddress[18] - J7-33 - PIN_B5
• sramAddress[19] - J7-31 - PIN_C4

SRAM (5CEFA2F23 FPGA pin numbers) J7 = U7

• n_sRamCS - J7-19 - PIN_BANK_2A_E2
• n_sRamWE - J7-29 - PIN_BANK_8A_D6
• n_sRamOE - J7-16 - PIN_BANK_2A_L2
• sramData[0] - J7-21 - PIN_BANK_2A_C1
• sramData[1] - J7-23 - PIN_BANK_8A_G6
• sramData[2] - J7-25 - PIN_BANK_8A_G8
• sramData[3] - J7-27 - PIN_BANK_8A_F7
• sramData[4] - J7-26 - PIN_BANK_8A_H8
• sramData[5] - J7-24 - PIN_BANK_9A_H6
• sramData[6] - J7-22 - PIN_BANK_2A_C6
• sramData[7] - J7-20 - PIN_BANK_2A_D3
• sramAddress[0] - J7-17 - PIN_BANK_2A_G1
• sramAddress[1] - J7-15 - PIN_BANK_2A_L1
• sramAddress[2] - J7-13 - PIN_BANK_2A_N1
• sramAddress[3] - J7-11 - PIN_BANK_2A_U1
• sramAddress[4] - J7-9 - PIN_BANK_2A_Y3
• sramAddress[5] - J7-10 - PIN_BANK_2A_W2
• sramAddress[6] - J7-12 - PIN_BANK_2A_U2
• sramAddress[7] - J7-14 - PIN_BANK_2A_N2
• sramAddress[8] - J7-18 - PIN_BANK_2A_G2
• sramAddress[9] - J7-28 - PIN_BANK_8A_E7
• sramAddress[10] - J7-30 - PIN_BANK_8A_C6
• sramAddress[11] - J7-32 - PIN_BANK_8A_D9
• sramAddress[12] - J7-34 - PIN_BANK_8A_A5
• sramAddress[13] - J7-36 - PIN_BANK_8A_B7
• sramAddress[14] - J7-38 - PIN_BANK_8A_A8
• sramAddress[15] - J7-40 - PIN_BANK_8A_A10
• sramAddress[16] - J7-37 - PIN_BANK_8A_A7
• sramAddress[17] - J7-35 - PIN_BANK_8A_B6
• sramAddress[18] - J7-33 - PIN_BANK_8A_B5
• sramAddress[19] - J7-31 - PIN_BANK_8A_E9

Headers/Jumpers

H1 - Power

• Power from USB 5V
• Do not power from FPGA when this jumper is installed

H2 - I/O Power Source

• 1-2 = FPGA Power
• 2-3 = On-board Regulator

J3 - Header (EP4CE15 FPGA pin numbers)

• J8P55 = IO_B22
• J8P56 = IO_B21
• J8B57 = IO_N20
• J8P58 = IO_N19
• J8P59 = IO_M20
• J8P60 = IO_M19

J3 - Header (5CEFA2F23 FPGA Card pin numbers)

• J8P55 = BANK_5B_L17
• J8P56 = BANK_5B_K17
• J8B57 = BANK_5B_K22
• J8P58 = BANK_5B_K21
• J8P59 = BANK_5N_M16
• J8P60 = BANK_5B_N16

P1 - VGA (EP4CE15 Card)

• videoR0 = U8-49 = PIN_B15
• videoR1 = U8-50 = PIN_A15
• videoG0 = U8-51 = PIN_B16
• videoG1 = U8-52 = PIN_A16
• videoB0 = U8-53 = PIN_B17
• videoB1 = U8-54 = PIN_A17
• hSync = U8-55 = PIN_B18
• vSync = U8-56 = PIN_A18

P1 - VGA (5CEFA2F23 Card)

• videoR0 = U8-49 = PIN_
• videoR1 = U8-50 = PIN_
• videoG0 = U8-51 = PIN_
• videoG1 = U8-52 = PIN_
• videoB0 = U8-53 = PIN_
• videoB1 = U8-54 = PIN_
• hSync = U8-55 = PIN_
• vSync = U8-56 = PIN_

P2 - PS/2 Keyboard (EP4CE15 FPGA pin numbers)

• PS2DAT = U7-8 = PIN_R1
• PS2CLK = U7-8 = PIN_R2

P2 - PS/2 Keyboard (5CEFA2F23 FPGA Card pin numbers)

• PS2DAT = U7-8 = PIN_BANK_2A_AA2
• PS2CLK = U7-8 = PIN_NANK_2A_AA1

P3 - USB-B MICRO OR B (EP4CE15 FPGA pin numbers)

• FT230X FTDI USB to Serial
• serSelect = U8-55 = PIN_B22 (J3-1 TO -2)
  • Needs weak pullup
    • set_instance_assignment -name WEAK_PULL_UP_RESISTOR ON -to serSelect
• txd1 = U7-43 = PIN_B10
• rxd1 = U7-45 = PIN_B13
  • Needs weak pullup
    • set_instance_assignment -name WEAK_PULL_UP_RESISTOR ON -to rxd1
• rts1 = U7-44 = PIN_A10
• cts1 = U7-46 = PIN_A13

P3 - USB-B MICRO OR B (5CEFA2F23 FPGA Card pin numbers)

• FT230X FTDI USB to Serial
• serSelect = U8-55 = PIN_BANK_5B_L17 (J3-1 TO -2)
  • Needs weak pullup
    • set_instance_assignment -name WEAK_PULL_UP_RESISTOR ON -to serSelect
• txd1 = U7-43 = PIN_BANK_8A_G10
• rxd1 = U7-45 = PIN_BANK_7A_C11
  • Needs weak pullup
    • set_instance_assignment -name WEAK_PULL_UP_RESISTOR ON -to rxd1
• rts1 = U7-44 = PIN_BANK_8A_F10
• cts1 = U7-46 = PIN_BANK_7A_B11

P4 - SD Card (EP4CE15 FPGA pin numbers)

• SDCS = U7-57 = PIN_B19
• MOSI = U7-58 = PIN_A19
• SCK = U7-59 = PIN_B20
• MISO = U7-60 = PIN_A20

P4 - SD Card (5CEFA2F23 FPGA pin numbers)

• SDCS = U7-57 = PIN_BANK_7A_B15
• MOSI = U7-58 = PIN_BANK_7A_C15
• SCK = U7-59 = PIN_BANK_7A_C16
• MISO = U7-60 = PIN_BANK_7A_B16

VGA - Ideal Drive 2:2:2 Case

• FPGA has a 3.3V driver which can drive 8 mA
• Ideal case drive current
  • 0.7V into 75 Ohms = 9.33 mA
• R-2R values
  • Ideal resistor values are 417.9 ohms and 835.7 ohms
  • Standard value 1% resistors
  • 1% standard values are 422 (Mouser), 845 (Mouser) Ohms
    • Get closest values
    • 0V, 0.228V, 0.460V, 0.693V
• Voltage steps are:

• Current steps are:

Schematic

• RETRO-EP4CE15 Schematic

Programming the FPGA EEPROM

• File
• Convert Programming File
• Configuration Device = EPCQ64
• Mode = Active Serial
• Programming File Type: *.jic
• Advanced = Check both Disables...
• Select Flash Loader
• Add Device = Cyclone IV and EP4CE15
• Select SOF Data
• Select Add File and select the .sof file
• Generate
• In Tools, Programmer
• Mode: JTAG
• Add file and select the .jic file
• Select Program/Configure
• Takes a while to program
• Press button near VGA

Multicomp Builds

• Github repo

Checkout

Rev 2 Issues

• GND on wrong USB pin
  • Was pin 4, s/b pin 5
  • Cut etch J4-4 to via
  • Add wire J4-5 to via
• FT230XS +3.3V out needs 10 uF cap (min)
  • Added 47uF electrolytic cap between via GND and vusb (3.3V) on rear of board

Rev 1 Issues

• Wrong DB15HD footprint
  • Change to right footprint in Rev 2
• USB-C too hard to hand solder
  • Changing to USB-B Micro in Rev 2
• Add 5V header in Rev 2

Rev 1 Prototype

• VGA connector footprint problem
• Using the J1 connector to VGAX49 card

Signal	VGAX49 Pin	RETRO Pin	FPGA Pin
GND	J1-19	J1-49	N/A
R4	J1-1	J1-47	C21
R3	J1-2	J1-48	C22
G5	J1-6	J1-45	D21
G4	J1-7	J1-46	D22
B4	J1-12	J1-43	E21
B3	J1-13	J1-44	E22
HS	J1-17	J1-41	F21
VS	J1-18	J1-42	F22

• Serial

Signal	RETRO Pin	FPGA Pin
GND	J1-50	N/A
SerTx	J1-39	H21
SerRx	J1-40	H22
SerCts	J1-37	J21
SerRts	J1-38	J22

Testing with R32V2020 and Multicomp

• VGA (on P1 to VGAX49 Card) works
  • Mounted on CARRIER95TO49MM board
• PS/2 Keyboard connector on RETRO-EP4CE15 works
  • Installed R1, R2 - 10K pull-ups
• R32V2020 - Land Boards 32-bit RISC CPU Works
• 40K SRAM, BASIC UK101 worked
• External SRAM works - Tested 40KB
• CP/M tested - Works with SD Card
  • Running ZEXALL
• Wrong color Mini-DIN (keyboard s/b purple)

Pin List (EP4CE15)

set_global_assignment -name FAMILY "Cyclone IV E"
set_global_assignment -name DEVICE EP4CE15F23C8
set_global_assignment -name TOP_LEVEL_ENTITY Microcomputer
set_global_assignment -name ORIGINAL_QUARTUS_VERSION "13.0 SP1"
set_global_assignment -name PROJECT_CREATION_TIME_DATE "17:55:48  OCTOBER 20, 2013"
set_global_assignment -name LAST_QUARTUS_VERSION "18.1.0 Lite Edition"
set_global_assignment -name PROJECT_OUTPUT_DIRECTORY output_files
set_global_assignment -name PARTITION_NETLIST_TYPE SOURCE -section_id Top
set_global_assignment -name PARTITION_FITTER_PRESERVATION_LEVEL PLACEMENT_AND_ROUTING -section_id Top
set_global_assignment -name PARTITION_COLOR 16764057 -section_id Top
set_global_assignment -name MIN_CORE_JUNCTION_TEMP 0
set_global_assignment -name MAX_CORE_JUNCTION_TEMP 85
set_global_assignment -name DEVICE_FILTER_PACKAGE FBGA
set_global_assignment -name DEVICE_FILTER_SPEED_GRADE 8
set_global_assignment -name STRATIX_DEVICE_IO_STANDARD "3.3-V LVTTL"
# Clock and reset
set_location_assignment PIN_T2 -to i_CLOCK_50
set_location_assignment PIN_W13 -to n_reset
set_instance_assignment -name WEAK_PULL_UP_RESISTOR ON -to n_reset
# PS/2
set_location_assignment PIN_R1 -to ps2Clk
set_instance_assignment -name WEAK_PULL_UP_RESISTOR ON -to ps2Clk
set_location_assignment PIN_R2 -to ps2Data
set_instance_assignment -name WEAK_PULL_UP_RESISTOR ON -to ps2Data
# Serial
set_location_assignment PIN_B22 -to serSelect
set_instance_assignment -name WEAK_PULL_UP_RESISTOR ON -to serSelect
set_location_assignment PIN_A13 -to cts1
set_instance_assignment -name WEAK_PULL_UP_RESISTOR ON -to cts1
set_location_assignment PIN_A10 -to rts1
set_location_assignment PIN_B13 -to rxd1
set_instance_assignment -name WEAK_PULL_UP_RESISTOR ON -to rxd1
set_location_assignment PIN_B10 -to txd1
# Video
set_location_assignment PIN_B15 -to videoR0
set_location_assignment PIN_A15 -to videoR1
set_location_assignment PIN_B16 -to videoG0
set_location_assignment PIN_A16 -to videoG1
set_location_assignment PIN_B17 -to videoB0
set_location_assignment PIN_A17 -to videoB1
set_location_assignment PIN_B18 -to hSync
set_location_assignment PIN_A18 -to vSync
# SRAM
set_location_assignment PIN_F1 -to n_sRamCS
set_location_assignment PIN_B4 -to n_sRamWE
set_location_assignment PIN_J2 -to n_sRamOE
set_location_assignment PIN_E1 -to sramData[0]
set_location_assignment PIN_C1 -to sramData[1]
set_location_assignment PIN_B1 -to sramData[2]
set_location_assignment PIN_B3 -to sramData[3]
set_location_assignment PIN_B2 -to sramData[4]
set_location_assignment PIN_C2 -to sramData[5]
set_location_assignment PIN_D2 -to sramData[6]
set_location_assignment PIN_F2 -to sramData[7]
set_location_assignment PIN_H1 -to sramAddress[0]
set_location_assignment PIN_J1 -to sramAddress[1]
set_location_assignment PIN_M1 -to sramAddress[2]
set_location_assignment PIN_N1 -to sramAddress[3]
set_location_assignment PIN_P1 -to sramAddress[4]
set_location_assignment PIN_P2 -to sramAddress[5]
set_location_assignment PIN_N2 -to sramAddress[6]
set_location_assignment PIN_M2 -to sramAddress[7]
set_location_assignment PIN_H2 -to sramAddress[8]
set_location_assignment PIN_A3 -to sramAddress[9]
set_location_assignment PIN_A4 -to sramAddress[10]
set_location_assignment PIN_C3 -to sramAddress[11]
set_location_assignment PIN_A5 -to sramAddress[12]
set_location_assignment PIN_A6 -to sramAddress[13]
set_location_assignment PIN_A7 -to sramAddress[14]
set_location_assignment PIN_A8 -to sramAddress[15]
set_location_assignment PIN_B7 -to sramAddress[16]
set_location_assignment PIN_B6 -to sramAddress[17]
set_location_assignment PIN_B5 -to sramAddress[18]
set_location_assignment PIN_C4 -to sramAddress[19]
# SDRAM
set_location_assignment PIN_Y6 -to sdRamClk
set_location_assignment PIN_W6 -to sdRamClkEn
set_location_assignment PIN_AA4 -to n_sdRamCas
set_location_assignment PIN_AA3 -to n_sdRamCe
set_location_assignment PIN_AB3 -to n_sdRamRas
set_location_assignment PIN_AB4 -to n_sdRamWe
set_location_assignment PIN_V2 -to sdRamAddr[0]
set_location_assignment PIN_V1 -to sdRamAddr[1]
set_location_assignment PIN_U2 -to sdRamAddr[2]
set_location_assignment PIN_U1 -to sdRamAddr[3]
set_location_assignment PIN_V3 -to sdRamAddr[4]
set_location_assignment PIN_V4 -to sdRamAddr[5]
set_location_assignment PIN_Y2 -to sdRamAddr[6]
set_location_assignment PIN_AA1 -to sdRamAddr[7]
set_location_assignment PIN_Y3 -to sdRamAddr[8]
set_location_assignment PIN_V5 -to sdRamAddr[9]
set_location_assignment PIN_W1 -to sdRamAddr[10]
set_location_assignment PIN_Y4 -to sdRamAddr[11]
set_location_assignment PIN_V6 -to sdRamAddr[12]
set_location_assignment PIN_Y1 -to sdRamAddr[13]
set_location_assignment PIN_W2 -to sdRamAddr[14]
set_location_assignment PIN_AA10 -to sdRamData[0]
set_location_assignment PIN_AB9 -to sdRamData[1]
set_location_assignment PIN_AA9 -to sdRamData[2]
set_location_assignment PIN_AB8 -to sdRamData[3]
set_location_assignment PIN_AA8 -to sdRamData[4]
set_location_assignment PIN_AB7 -to sdRamData[5]
set_location_assignment PIN_AA7 -to sdRamData[6]
set_location_assignment PIN_AB5 -to sdRamData[7]
set_location_assignment PIN_Y7 -to sdRamData[8]
set_location_assignment PIN_W8 -to sdRamData[9]
set_location_assignment PIN_Y8 -to sdRamData[10]
set_location_assignment PIN_V9 -to sdRamData[11]
set_location_assignment PIN_V10 -to sdRamData[12]
set_location_assignment PIN_Y10 -to sdRamData[13]
set_location_assignment PIN_W10 -to sdRamData[14]
set_location_assignment PIN_V11 -to sdRamData[15]
# 
set_location_assignment PIN_AB14 -to IO_PIN[3]
set_location_assignment PIN_AA14 -to IO_PIN[4]
set_location_assignment PIN_AB15 -to IO_PIN[5]
set_location_assignment PIN_AA15 -to IO_PIN[6]
set_location_assignment PIN_AB16 -to IO_PIN[7]
set_location_assignment PIN_AA16 -to IO_PIN[8]
set_location_assignment PIN_AB17 -to IO_PIN[9]
set_location_assignment PIN_AA17 -to IO_PIN[10]
set_location_assignment PIN_AB18 -to IO_PIN[11]
set_location_assignment PIN_AA18 -to IO_PIN[12]
set_location_assignment PIN_AB19 -to IO_PIN[13]
set_location_assignment PIN_AA19 -to IO_PIN[14]
set_location_assignment PIN_AB20 -to IO_PIN[15]
set_location_assignment PIN_AA20 -to IO_PIN[16]
set_location_assignment PIN_Y21 -to IO_PIN[17]
set_location_assignment PIN_Y22 -to IO_PIN[18]
set_location_assignment PIN_W21 -to IO_PIN[19]
set_location_assignment PIN_W22 -to IO_PIN[20]
set_location_assignment PIN_V21 -to IO_PIN[21]
set_location_assignment PIN_V22 -to IO_PIN[22]
set_location_assignment PIN_U21 -to IO_PIN[23]
set_location_assignment PIN_U22 -to IO_PIN[24]
set_location_assignment PIN_R21 -to IO_PIN[25]
set_location_assignment PIN_R22 -to IO_PIN[26]
set_location_assignment PIN_P21 -to IO_PIN[27]
set_location_assignment PIN_P22 -to IO_PIN[28]
set_location_assignment PIN_N21 -to IO_PIN[29]
set_location_assignment PIN_C22 -to IO_PIN[48]
set_location_assignment PIN_C21 -to IO_PIN[47]
set_location_assignment PIN_D22 -to IO_PIN[46]
set_location_assignment PIN_D21 -to IO_PIN[45]
set_location_assignment PIN_E22 -to IO_PIN[44]
set_location_assignment PIN_E21 -to IO_PIN[43]
set_location_assignment PIN_F22 -to IO_PIN[42]
set_location_assignment PIN_F21 -to IO_PIN[41]
set_location_assignment PIN_H22 -to IO_PIN[40]
set_location_assignment PIN_H21 -to IO_PIN[39]
set_location_assignment PIN_J22 -to IO_PIN[38]
set_location_assignment PIN_J21 -to IO_PIN[37]
set_location_assignment PIN_K22 -to IO_PIN[36]
set_location_assignment PIN_K21 -to IO_PIN[35]
set_location_assignment PIN_L22 -to IO_PIN[34]
set_location_assignment PIN_L21 -to IO_PIN[33]
set_location_assignment PIN_M22 -to IO_PIN[32]
set_location_assignment PIN_M21 -to IO_PIN[31]

Assembly Sheet

• RETRO-EP4CE15 Rev 4 Assembly Sheet
• RETRO-EP4CE15 Assembly Sheet