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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

Overview


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





Photos



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

AT24CXX EEPROM Board
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


 



Note: The OpenEPM1270 does NOT integrate any programming/debugging function, a programmer/debugger is required.




Examples


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






















































































































PeripheralDescriptionInterfaceVerilogVHDL
AT24CXX EEPROM I2C Y Y
FM24CXX FRAM I2C Y Y
DS18B20 Temperature sensor 1-WIRE Y Y
SP3232 Serial communication UART Y Y
SP3485 Serial communication UART Y Y
PL2303 USB TO UART UART Y Y
CY7C68013A USB DEVICE USB   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.)


Wiki: www.utsource.net/wiki/OpenEPM1270




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