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Key Parameters and Features:
- Logic Elements (LEs): 240
- I/O Pins: 80
- Macro Cells: 240
- Operating Voltage: 1.8V
- Package: 100-pin FineLine BGA
- Memory: Built-in Flash
- Speed Grades: Available in various speed grades
- Power Options: Low-power modes available
Application Scenarios
EPM240F100C5NAB is commonly used in various applications such as:
1. Digital Signal Processing
2. Control Systems
3. I/O Expansions
4. Data Acquisition Systems
5. Custom Logic Implementations
Example: I/O Expansion Circuit
Circuit Requirements
In this example, the EPM240F100C5NAB is used for I/O expansion in a microcontroller-based system.
Key Components:
- 1x EPM240F100C5NAB CPLD
- 1x 3.3V Voltage Regulator
- Multiple LEDs for output
- Multiple Push-buttons for input
- Connectors for interfacing with a microcontroller (SPI, for instance)
Circuit Connection Details
1. Power Supply: Connect a 3.3V voltage regulator to power pins VCCINT (pins 1, 24, 45) and VCCIO (pins 20, 68, 91). The ground wire needs to be attached to the GND pins (pins 8, 31, and 50).
2. Clock Source: If using an external clock, connect it to dedicated clock pins like GCLK (pin 6).
3. I/O Pins: Connect the I/O pins to the LEDs and push-buttons. For example, you can connect LED1 to pin 12 (IO_12) and Push-button1 to pin 13 (IO_13).
4. SPI Interface: Connect SPI lines from a microcontroller to dedicated I/O pins on EPM240F100C5NAB. For instance, MOSI can be connected to pin 28, MISO to pin 29, and CLK to pin 30.
5. Configuration Pins: nCONFIG (pin 4), nSTATUS (pin 2), and CONF_DONE (pin 3) can be left unconnected or connected to microcontroller GPIOs for dynamic reconfiguration.
6. Decoupling Capacitors:To filter noise, put decoupling capacitors adjacent to the power pins.
Design Considerations
- Power Requirements: Make sure to provide clean and stable power to the EPM240F100C5NAB.
- Signal Integrity: Make sure the traces for clock and data signals are impedance-matched to avoid signal integrity issues.
- Firmware: You will need to write or generate CPLD logic in VHDL or Verilog, which must be then synthesized and programmed into the EPM240F100C5NAB.
- Debugging: Make sure to have access to key signals for debugging purposes, perhaps via test points or debug headers.
By carefully considering the above points, a robust I/O expansion system can be designed using the EPM240F100C5NAB CPLD.
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(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.
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