EP2C15AF256C6N

The EP2C15AF256C6N is a mid-range member of Altera’s Cyclone II FPGA family — the second generation of Cyclone low-cost FPGAs, designed to deliver maximum value for cost-sensitive high-volume applications. Manufactured on TSMC’s 90nm process technology with a 1.2V core voltage, Cyclone II devices offer significantly higher logic density and lower power consumption than the original Cyclone family at comparable cost points. The EP2C15A variant provides 14,448 logic elements organized into 903 logic array blocks (LABs), with each LAB containing 16 logic elements for efficient implementation of combinational and sequential logic functions. The embedded memory subsystem consists of 52 M4K RAM blocks, each providing 4,608 bits of configurable SRAM that can be configured as single-port, dual-port, or FIFO memory — totaling 239,616 bits of on-chip memory for data buffering, lookup tables, and processor scratchpad. For signal processing applications, 26 embedded 18×18-bit multipliers support efficient implementation of DSP functions including FIR filters, FFTs, and matrix operations. The 4 phase-locked loops (PLLs) provide flexible clock synthesis and multiplication/division, supporting a wide range of internal and external clock frequencies. The 256-pin FineLine BGA package provides up to 180 user I/O pins organized into multiple I/O banks, each supporting independent supply voltages to enable interfacing with different logic families. The FPGA supports a comprehensive set of single-ended and differential I/O standards including LVTTL, LVCMOS (3.3V/2.5V/1.8V/1.5V), SSTL, HSTL, PCI, LVDS, mini-LVDS, and RSDS — enabling direct connection to a wide variety of memory devices, peripherals, and communication interfaces. External memory support includes DDR SDRAM, DDR2 SDRAM, and SDR SDRAM interfaces for high-speed data storage. The Cyclone II architecture is fully supported by Altera’s Quartus II design software, which provides synthesis, place-and-route, timing analysis, and programming tools. Users can implement custom logic in Verilog or VHDL, or use Altera’s extensive library of IP cores including the Nios II soft embedded processor, DDR memory controllers, Ethernet MACs, and various communication peripherals. With its balanced mix of logic, memory, DSP, and I/O resources at a low cost, the EP2C15AF256C6N is well-suited for a wide range of applications from consumer electronics and automotive to industrial control and communications.

The Cyclone II FPGA is a SRAM-based programmable logic device whose internal configuration is stored in static RAM cells that control the function of logic elements, routing resources, and I/O buffers. At power-up, the FPGA has no defined function — it must be configured by loading a configuration bitstream from an external serial configuration device (EPCS serial flash), a microprocessor (passive serial mode), or via the JTAG interface. Once configured, the FPGA implements the user’s custom logic design. The fundamental logic building block is the logic element (LE), which contains a 4-input look-up table (LUT) that can implement any 4-input Boolean function, a programmable flip-flop for sequential logic, carry chain logic for arithmetic operations, and register chain connections for shift register implementation. LEs are organized into groups of 16 called logic array blocks (LABs), with each LAB having local interconnect resources that allow fast communication between LEs within the same block. The M4K memory blocks are 4,608-bit SRAM blocks that can be configured in various modes: single-port RAM, simple dual-port RAM, true dual-port RAM, shift register (RAM-based shift register), ROM, or FIFO buffer. Each M4K block also includes parity bits for error detection. The embedded 18×18 multipliers are dedicated hardware multiplier blocks that can perform 18×18-bit signed or unsigned multiplication in a single clock cycle, significantly improving the efficiency of DSP functions compared to implementing multipliers in general-purpose logic. The phase-locked loops (PLLs) provide clock synthesis capabilities including frequency multiplication, frequency division, phase shifting, and duty cycle programming. They are used to generate precise internal clock frequencies from an external reference clock, and to compensate for clock delay across the device. The general routing structure consists of horizontal and vertical routing channels of varying lengths (local, row, column, and global) that connect LABs, memory blocks, multipliers, and I/O pins. The I/O elements (IOEs) at the periphery of the device contain input, output, and output enable registers, and support a wide range of I/O standards with programmable drive strength, slew rate control, and bus hold features. When implementing a design, the Quartus II software synthesizes the user’s HDL code into logic elements, then performs place-and-route to map the logic onto the physical FPGA resources and configure the routing interconnect. The resulting configuration bitstream is downloaded to the FPGA either at power-up (from external flash) or via JTAG for development and testing.

The EP2C15AF256C6N is available in a 256-pin FineLine BGA package (17mm × 17mm). Major pin groups:

Note: Exact I/O count depends on how many pins are used for power, ground, configuration, and clock functions. The number of available user I/Os varies based on package and pin usage. Refer to the official Cyclone II EP2C15 datasheet and pin files for complete pin assignments and I/O bank descriptions.

• Consumer Electronics: Used in flat-panel display controllers, set-top boxes, DVD/Blu-ray players, digital TVs, and gaming peripherals for video processing, display timing control, and interface bridging
• Industrial Control & Automation: Deployed in PLC I/O modules, industrial sensor interfaces, motion controllers, and factory automation equipment for real-time signal processing, custom logic control, and communication protocol implementation
• Automotive Electronics: Used in automotive infotainment systems, driver assistance cameras, and body electronics (with automotive-grade variants) for video processing, sensor interfaces, and custom control logic
• Communications Equipment: Found in network switches, routers, modems, and VoIP gateways for packet processing, protocol conversion, and interface bridging functions
• Video Processing & Display: Used in video scalers, format converters, video capture cards, and display controllers where parallel processing of pixel data and custom timing generation are required
• Nios II Soft Processor Systems: Implements Nios II embedded processor systems with custom peripherals, providing a flexible software-programmable platform for applications that need both processor and custom hardware acceleration
• Motor Control & Drives: Used in industrial motor drives and servo controllers for high-speed current loop implementation, PWM generation, encoder interfaces, and custom control logic acceleration
• Test & Measurement Equipment: Deployed in oscilloscopes, data loggers, spectrum analyzers, and custom test equipment for data acquisition, signal processing, and high-speed data path implementation