OpenEPM1270 Standard, CPLD Development Board

WSD - 0014

New product

39,000 Ks

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CPLD development board designed for ALTERA MAX II series, features the EPM1270 onboard, and integrates various standard interfaces, pretty easy for peripheral expansions.
EPM1270 development board


OpenEPM1270 is a CPLD development board that features the EPM1270 device onboard. It supports further expansion with various optional accessory boards for specific application. The modular and open design makes it the ideal for starting application development with ALTERA MAX II series CPLD devices.

What's On Board

EPM1270 development board on board resource
  1. EPM1270:onboard CPLD device which features:
    • Operating Frequency: 50MHz
    • Operating Voltage: 1.5-3.3V
    • Package: QFP144
    • I/Os:116
    • LEs: 1,270, the equivalent to 4,000 logic gates
    • Debugging/Programming: JTAG
  2. AMS1117-3.3: 3.3V voltage regulator
  3. Power switch
  4. Power indicator
  5. LEDs: convenient for indicating I/O status and/or program running state
  6. Joystick: five positions
  7. Reset button
  8. Buzzer
  9. 8 I/Os interface: for connecting accessory boards
  10. 16 I/Os interface: for connecting accessory boards
  11. 8 I/Os interface: for connecting accessory boards
  12. 32 I/Os interface: for connecting accessory boards

For interface 9-12: it's possible to emulate the interfaces as ONE-WIRE, USART, I2C, SPI, PS/2, etc.

  1. 1-WIRE interface: for connecting 1-WIRE devices (TO-92 package), such as temperature sensor (DS18B20), electronic registration number (DS2401), etc.
  2. Character LCD interface: for connecting character LCD, such as the LCD1602 (5V Blue Backlight) in Package B
  3. 5V DC jack
  4. JTAG interface: for programming/debugging
  5. MCU pins connector: all the MCU pins are accessible on expansion connectors for further expansion
  6. LEDs jumper
  7. Buzzer jumper

For jumper 18-19:

  • short the jumper to connect to I/Os used in example code
  • open the jumper to connect to other custom pins via jumper wires


CPLD Development Board
OpenEPM1270 Development Board
CPLD Development Board
Connecting to LCD1602
CPLD Development Board
Connecting to USB Blaster
CPLD Development Board
Connecting to various peripherals
PL2303 USB UART Board mini
Connecting to USB UART Board via UART
8 SEG LED Board
Connecting to 8 SEG LED Board via 16I/Os
8 Push Buttons
8 Push Buttons on the 8 I/Os interface
5 IO Keypad
Connecting to 5 IO Keypad
4x4 Keypad
4x4 Keypad on the 8 I/Os interface
Connecting to EEPROM Board via I2C
VGA PS2 Board
Connecting to VGA PS2 Board
Connecting to any accessory board
Connecting to any accessory board you need

The OpenEPM1270 does NOT integrate any programming/debugging function, a programmer/debugger is required.
Accessory boards in the photo are NOT included in the OpenEPM1270 Standard Package.


OpenEPM1270 comes with various examples codes for the supported peripherals, which give you a quick start to develop your own application.

DS18B20 Temperature sensor 1-WIRE Y Y
SP3232 Serial communication UART Y Y
SP3485 Serial communication UART Y Y
Buzzer Sound device 1I/O(PWM) Y Y
PS/2 keyboard Input device PS/2 Y Y
Single buttons Input device ---- Y Y
4x4 keypad Input device 8I/Os Y Y
Joystick Input device 5I/Os Y Y
LED Display device ---- Y Y
8 SEG LED Display device 13I/Os Y Y
VGA monitor Display device VGA Y Y
Character LCD Display device 11I/Os Y Y

Debugging/Programming Interfaces

The OpenEPM1270 integrates JTAG interface for programming/debugging.

JTAG Signal Names & Description

PinSignal NameDescription
1 TCK Clock signal
2 GND Signal ground
3 TDO Data from device
4 VCC(TRGT) Target power supply
5 TMS JTAG state machine control
6 NC No connect
7 NC No connect
8 NC No connect
9 TDI Data to device
10 GND Signal ground

JTAG Header Pinout

10-pin JTAG header pinout

Development Resources

The User Guide CD includes development resources listed as follow:

  • Related Software (Quaters II etc.)
  • Demo Code (Verilog and VHDL)
  • Schematic (PDF)
  • CPLD Development Documentations (Datasheets etc.)


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