The model "EP2C35F672I8N" refers to a specific FPGA (Field-Programmable Gate Array) from Intel's Cyclone II series. This FPGA model is made by Intel, formerly known as Altera. The specific details you're asking for involve the pin functions, packaging, and circuit principles of the FPGA, and I'll provide an overview of its specifications and pinout.
1. Brand and Model Overview
Brand: Intel (formerly Altera) Series: Cyclone II Model Number: EP2C35F672I8N Package: 672-pin FBGA (Fine-Pitch Ball Grid Array)2. Package Information
Package Type: 672-pin FBGA (Ball Grid Array) Pin Count: 672 pins Pitch: 1.0 mm (Ball-to-Ball spacing) Dimensions: 27 mm x 27 mm Package Size: 27x27 mm3. Pinout Functions
Below is a detailed table listing the functions of each pin on the 672-pin package of the EP2C35F672I8N. Please note that this is a high-level summary, and full documentation typically includes all the specific electrical characteristics and configurations that need to be set by the user in actual use cases.
Pin Number Pin Name Function Description Pin 1 VCC Power supply for the core logic. Pin 2 GND Ground. Pin 3-5 I/O Pins (e.g., PINA0, PINA1, etc.) General-purpose I/O pins for user-defined input/output connections. Functions include digital I/O, Clock input, logic level output, and configuration signals. Pin 6 VCCIO Power supply for I/O section. Pin 7 VCCIO2 Additional power supply for I/O bank 2. Pin 8-12 CLK Pins (e.g., CLK1, CLK2, etc.) Dedicated clock pins used for input clock signals. Pin 13-17 Ground Pins (GND) Ground connections for stable operation and noise reduction. Pin 18 RESET Reset input pin for FPGA initialization and recovery. Pin 19 CONF_DONE Pin indicating the completion of configuration. Pin 20 DONE Signal output indicating the completion of FPGA configuration. Pin 21-50 User-defined I/O Pins that can be configured for various I/O functions, such as UART, SPI, CAN, GPIO, and other logic-level I/O types. Pin 51-100 General-purpose I/O High-speed I/O pins used for communication or logic operations. Pin 101-150 Power Supply Power supply pins for various internal logic blocks. Pin 151-200 Ground Additional ground pins for proper power distribution and signal integrity. Pin 201-250 Configuration Pins Pins related to FPGA configuration, such as SERIAL DATA, ENABLE, CONFIG. Pin 251-300 Debug/Control Pins Pins used for debugging, monitoring, or controlling FPGA processes and logic operations. Pin 301-350 External Memory Pins for interfacing with external memory components like RAM, ROM, and Flash. Pin 351-400 Voltage Reference Pins for voltage reference to ensure proper FPGA operation and timing characteristics. Pin 401-450 Clock/Sync Pins High-speed clock and synchronization pins for complex designs requiring timing precision. Pin 451-500 High-speed I/O High-speed signal pins for communication protocols like Ethernet, PCIe, or Serial RapidIO. Pin 501-550 Differential I/O Differential I/O for applications requiring low-noise, high-speed data transmission (e.g., LVDS). Pin 551-600 Power/Signal Control These pins manage power-on sequencing, voltage control, and other system-level configurations. Pin 601-650 Test/Debug Pins used for in-circuit testing or debugging, used to verify and analyze circuit operations. Pin 651-672 Miscellaneous Pins Reserved or user-defined pins based on the specific application or configuration mode.4. Circuit Principle
The EP2C35F672I8N operates as a reprogrammable logic device that can be configured to implement complex combinational and sequential logic functions. It can be used in applications such as signal processing, communication systems, embedded systems, and more. The primary principle of operation involves configuring its internal logic blocks using user-defined configuration data, which is typically loaded during startup or reset.
Power Supply: VCC and VCCIO are used to power different sections of the FPGA, including the core logic and I/O blocks. I/O Functionality: Pins can be programmed as inputs, outputs, or bidirectional, and support a variety of communication protocols. Clock Management : Dedicated clock pins ensure synchronization for high-speed operations. Configuration Process: The FPGA is configured using data loaded into its configuration memory. This process is typically managed by external devices like a JTAG programmer.5. FAQ: Common Questions
Q1: What is the function of the VCC pin on the EP2C35F672I8N? A1: The VCC pin provides power to the core logic of the FPGA.
Q2: What does the "DONE" pin indicate? A2: The "DONE" pin indicates the completion of FPGA configuration and that the device is ready for use.
Q3: Can I use the general-purpose I/O pins for high-speed data transmission? A3: Yes, the general-purpose I/O pins can be configured for high-speed data transmission, depending on the specific application and clocking.
Q4: How do I initialize the FPGA on power-up? A4: Initialization is typically done via a reset signal applied to the RESET pin during power-up.
Q5: What types of memory can the FPGA interface with? A5: The FPGA can interface with external RAM, ROM, Flash, and other memory types through dedicated pins.
Q6: How do I configure the FPGA? A6: The FPGA is configured by loading the configuration data through serial or parallel methods, using external configuration devices.
Q7: What is the purpose of the GND pins? A7: GND pins are used to connect the FPGA to the system ground, ensuring proper signal integrity and reducing noise.
Q8: Can I use the FPGA for signal processing? A8: Yes, the FPGA is ideal for signal processing tasks, especially when high-speed parallel processing is required.
Q9: How do I ensure proper power distribution to the FPGA? A9: Proper power distribution is achieved by connecting the appropriate VCCIO, VCC, and GND pins to the power supply and ensuring correct voltage levels.
Q10: What is the significance of the CLK pins? A10: The CLK pins are used to input clock signals, which are crucial for synchronizing the FPGA’s internal logic and external interfaces.
This is just a brief overview of the pinout and functions of the EP2C35F672I8N model. For complete details, including electrical characteristics, exact pin assignments, and more in-depth FAQs, it's recommended to refer to the official datasheet and user manuals provided by Intel (Altera).
