The Altera CPLD EPM7128SLC84 Development Board is a practical programmable logic development platform for digital electronics, CPLD programming, logic design, embedded hardware experiments and FPGA/CPLD education. BDTronics offers this development board with a genuine Altera EPM7128SLC84 CPLD chip, providing access to all CPLD I/O pins for custom digital circuits and secondary development.

BDTronics EPM7128SLC84 development board integrates commonly required peripherals including 8 independent push buttons, 4-bit DIP switch, 8 LED indicators, 4-digit 7-segment display, LCD1602 interface, buzzer, PS/2 interface and serial port. A 50MHz active crystal oscillator provides a convenient clock source for timing, counters, communication experiments and digital logic projects.

The board includes a JTAG programming interface for downloading logic programs into the CPLD. All CPLD pins are brought out to the board interfaces, making it suitable for experimenting with custom input/output circuits, digital logic, counters, timers, state machines, display controllers and communication interfaces.

Features:

• Genuine Altera CPLD EPM7128SLC84 main chip

• CPLD development and digital logic experimentation board

• EPM7128SLC84 programmable logic device

• All CPLD pins are led out for user access

• TTL I/O output level

• 50MHz active crystal oscillator

• Global clock GCLK1

• JTAG programming interface

• Supports downloading logic programs through JTAG

• DC 5V ±10% power input

• Approximately 0.08A ±10% no-load current

• Dedicated power switch

• Red power indicator LED

• Dedicated reset push button

• 8 independent push buttons

• 4-bit DIP switch

• 8 LED status indicators

• 4-digit digital tube / 7-segment display

• LCD1602 5V interface

• On-board buzzer

• PS/2 interface

• Serial communication interface

• All I/O ports exposed for secondary development

• USB power cable included

• Serial cable included

• Suitable for CPLD programming and digital circuit learning

• Useful for electronics laboratory projects and hardware prototyping

Altera EPM7128SLC84 CPLD:

• Main programmable logic device: Altera EPM7128SLC84.

• EPM7128SLC84 belongs to the Altera MAX 7000 family of CPLD devices.

• The CPLD can be programmed to implement custom digital logic.

• All available CPLD pins on the device are brought out for convenient experimentation.

• Programmable logic can be developed for counters, timers, state machines, control logic, display drivers and digital interfaces.

• The JTAG interface provides a direct method for downloading programmed logic into the CPLD.

• Suitable for learning programmable logic design using hardware rather than relying only on simulation.

• The genuine chip configuration makes the board useful for practical Altera CPLD development and legacy MAX 7000 projects.

50MHz Clock Source:

• Includes a 50MHz active crystal oscillator.

• Provides a stable clock source for digital logic experiments.

• Global clock GCLK1 is available for clock-driven CPLD designs.

• The 50MHz clock can be used for counters, frequency division, timing circuits, pulse generation and digital communication experiments.

• Users can implement clock dividers inside the CPLD to generate slower timing signals required by peripherals.

JTAG Programming Interface:

• Includes a dedicated JTAG interface for CPLD programming.

• Used to download logic designs into the EPM7128SLC84.

• Suitable for development, testing and repeated firmware/logic programming.

• Allows users to modify the CPLD logic without changing the hardware circuit.

• A compatible Altera/Intel CPLD programming solution can be used with the board's JTAG interface.

Digital Input and Output:

• 8 independent push buttons provide manual digital inputs.

• 4-bit DIP switch provides four configurable hardware input signals.

• 8 LED indicators provide visual output for digital logic states.

• All CPLD I/O pins are accessible for custom circuit development.

• Buttons and DIP switches can be used to test counters, state machines, control logic and other programmable functions.

• LEDs can be assigned to user-defined CPLD outputs.

4-Digit Digital Tube:

• Integrated 4-digit digital tube display.

• Suitable for displaying numerical values generated by the CPLD.

• Useful for counter, timer, frequency meter and digital measurement projects.

• Can be controlled through programmable CPLD logic.

• Provides a convenient visual output without requiring an external display module.

LCD1602 Interface:

• Includes a 5V LCD1602 interface.

• Suitable for connecting compatible 16×2 character LCD modules.

• Can be used to display numbers, characters, status information and project parameters.

• Useful for learning parallel LCD control using programmable logic.

• The CPLD can implement the required LCD timing and control signals.

PS/2 Interface:

• Integrated PS/2 interface for compatible keyboards and input devices.

• Suitable for digital logic projects requiring keyboard input.

• Can be used to experiment with PS/2 communication protocols.

• Useful for developing keyboard-controlled displays, counters and interactive digital systems.

Serial Port:

• Includes a serial communication interface.

• Suitable for UART-based communication experiments.

• Can be used to exchange data between the CPLD and a computer or compatible serial device.

• Useful for learning UART transmitter and receiver logic.

• The supplied serial cable can be used for serial communication applications.

Buzzer:

• Integrated buzzer provides audible output.

• Can be controlled using CPLD logic.

• Suitable for alarms, status notifications, timers and interactive electronics projects.

• Useful for testing programmable frequency and pulse-generation circuits.

Power Supply:

• Board operating supply: DC 5V ±10%.

• Includes one DC 5V power input.

• USB power cable is included.

• Dedicated power switch allows convenient power control.

• Red power indicator shows board power status.

• Specified no-load current: approximately 0.08A ±10%.

• Use a suitable regulated 5V supply when powering the board.

Secondary Development:

• All CPLD I/O ports are brought out for user access.

• Allows external sensors, switches, LEDs, displays and digital circuits to be connected according to the CPLD's electrical requirements.

• Suitable for developing custom digital logic circuits.

• Useful for university laboratory work, electronics courses and engineering projects.

• Can be used for counters, frequency dividers, PWM generators, digital clocks, traffic-light controllers, state machines and communication interfaces.

• The exposed I/O makes the board suitable for custom hardware experimentation beyond its built-in peripherals.

How to Use:

• Connect the development board to a suitable 5V DC power source using the supplied USB power cable or appropriate 5V input.

• Turn on the power switch.

• Confirm that the red power LED illuminates.

• Connect a compatible JTAG programmer to the JTAG interface.

• Prepare the required CPLD logic design using an appropriate development environment.

• Compile or synthesize the design for the EPM7128SLC84 device.

• Connect the JTAG programmer and download the compiled logic design to the CPLD.

• Use the onboard buttons and DIP switches as digital inputs.

• Observe logic outputs using the 8 LED indicators.

• Use the 4-digit digital tube for numerical display projects.

• Connect an LCD1602 module to the LCD interface for character display projects.

• Use the PS/2 interface for keyboard-related experiments.

• Use the serial port for UART communication projects.

• Use the buzzer as a programmable audio or alarm output.

• Use the exposed I/O pins for external digital circuits and secondary development.

• Press the reset button when the project design requires a reset input.

• Always verify voltage levels and pin assignments before connecting external hardware.

Applications:

• Altera CPLD development

• EPM7128SLC84 programming

• MAX 7000 CPLD projects

• Digital logic design

• Programmable logic experiments

• FPGA and CPLD education

• Electronics laboratory experiments

• University digital electronics projects

• Embedded hardware development

• Digital circuit prototyping

• Counter and timer projects

• Frequency divider projects

• Digital clock projects

• PWM generation

• State machine design

• LED control

• 7-segment display projects

• LCD1602 interface experiments

• UART serial communication

• PS/2 keyboard projects

• Digital control systems

• Custom CPLD hardware development

What's Included:

• 1 × EPM7128SLC84 CPLD development board

• 1 × USB power cable

• 1 × Serial communication cable

Specifications:

• Product Type: CPLD / FPGA Development Board

• Main Chip: Altera EPM7128SLC84

• CPLD Family: Altera MAX 7000

• Device Package: PLCC-84

• Logic Device: EPM7128S

• I/O Level: TTL

• Clock Oscillator: 50MHz Active Crystal Oscillator

• Global Clock: GCLK1

• Programming Interface: JTAG

• Power Input: DC 5V

• Power Supply Tolerance: ±10%

• No-Load Current: 0.08A ±10%

• Power Switch: 1

• Power Indicator: 1 × Red LED

• Reset Button: 1

• Independent Push Buttons: 8

• DIP Switch: 4-bit

• LED Indicators: 8

• Digital Display: 4-digit digital tube

• LCD Interface: LCD1602, 5V

• Buzzer: 1

• PS/2 Interface: 1

• Serial Port: 1

• CPLD I/O Access: All pins led out

• JTAG Interface: 1

• USB Cable: Included

• Serial Cable: Included

• Suitable Power Source: Regulated 5V DC

Important Usage Notes:

• Use a regulated 5V power supply within the specified input range.

• Verify JTAG programmer compatibility before programming the CPLD.

• Check CPLD pin assignments carefully when designing custom logic.

• Verify TTL voltage compatibility before connecting external circuits to the I/O pins.

• Do not apply voltages outside the supported electrical limits to CPLD I/O pins.

• Confirm polarity before applying power.

• External circuits should share an appropriate ground reference with the development board.

• The onboard peripherals can be controlled through user-developed CPLD logic.

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