More information about the XC2S15-5CS144C: The Spartan-II Field-Programmable Gate Array family gives users high performance, abundant logic resources, and a rich feature set, all at an exceptionally low price. The six-member family offers densities ranging from 15,000 to 200,000 system gates. System performance is supported up to 200 MHz. Features include block RAM (to 56K bits), distributed RAM (to 75,264 bits), 16 selectable I/O standards, and four DLLs. Fast, predictable interconnect means that successive design iterations continue to meet timing requirements. The Spartan-II family is a superior alternative to mask-programmed ASICs. The FPGA avoids the initial cost, lengthy development cycles, and inherent risk of conventional ASICs. Also, FPGA programmability permits design upgrades in the field with no hardware replacement necessary (impossible with ASICs).The Spartan-II family of FPGAs have a regular, flexible, programmable architecture of Configurable Logic Blocks (CLBs), surrounded by a perimeter of programmable Input/Output Blocks (IOBs). There are four Delay-Locked Loops (DLLs), one at each corner of the die. Two columns of block RAM lie on opposite sides of the die, between the CLBs and the IOB columns. These functional elements are interconnected by a powerful hierarchy of versatile routing channels. Spartan-II FPGAs are customized by loading configuration data into internal static memory cells. Unlimited reprogramming cycles are possible with this approach. Stored values in these cells determine logic functions and interconnections implemented in the FPGA. Configuration data can be read from an external serial PROM (master serial mode), or written into the FPGA in slave serial, slave parallel, or Boundary Scan modes. Spartan-II FPGAs are typically used in high-volume applications where the versatility of a fast programmable solution adds benefits. Spartan-II FPGAs are ideal for shortening product development cycles while offering a cost-effective solution for high volume production. Spartan-II FPGAs achieve high-performance, low-cost operation through advanced architecture and semiconductor technology. Spartan-II devices provide system clock rates up to 200 MHz. In addition to the conventional benefits of high-volume programmable logic solutions, Spartan-II FPGAs also offer on-chip synchronous single-port and dual-port RAM (block and distributed form), DLL clock drivers, programmable set and reset on all flip-flops, fast carry logic, and many other features.