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EP20K200 Datasheet(PDF) 9 Page - Altera Corporation |
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EP20K200 Datasheet(HTML) 9 Page - Altera Corporation |
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9 / 117 page  Altera Corporation 9 APEX 20K Programmable Logic Device Family Data Sheet Functional Description APEX 20K devices incorporate LUT-based logic, product-term-based logic, and memory into one device. Signal interconnections within APEX 20K devices (as well as to and from device pins) are provided by the FastTrack® Interconnect—a series of fast, continuous row and column channels that run the entire length and width of the device. Each I/O pin is fed by an I/O element (IOE) located at the end of each row and column of the FastTrack Interconnect. Each IOE contains a bidirectional I/O buffer and a register that can be used as either an input or output register to feed input, output, or bidirectional signals. When used with a dedicated clock pin, these registers provide exceptional performance. IOEs provide a variety of features, such as 3.3-V, 64-bit, 66-MHz PCI compliance; JTAG BST support; slew-rate control; and tri-state buffers. APEX 20KE devices offer enhanced I/O support, including support for 1.8-V I/O, 2.5-V I/O, LVCMOS, LVTTL, LVPECL, 3.3-V PCI, PCI-X, LVDS, GTL+, SSTL-2, SSTL-3, HSTL, CTT, and 3.3-V AGP I/O standards. The ESB can implement a variety of memory functions, including CAM, RAM, dual-port RAM, ROM, and FIFO functions. Embedding the memory directly into the die improves performance and reduces die area compared to distributed-RAM implementations. Moreover, the abundance of cascadable ESBs ensures that the APEX 20K device can implement multiple wide memory blocks for high-density designs. The ESB’s high speed ensures it can implement small memory blocks without any speed penalty. The abundance of ESBs ensures that designers can create as many different-sized memory blocks as the system requires. Figure 1 shows an overview of the APEX 20K device. Figure 1. APEX 20K Device Block Diagram LUT LUT LUT LUT LUT Memory Memory Memory Memory IOE IOE IOE IOE IOE IOE IOE IOE LUT LUT Memory Memory IOE IOE Product Term Product Term LUT LUT Memory Memory IOE IOE Product Term Product Term Product Term Product Term Product Term Product Term FastTrack Interconnect Clock Management Circuitry IOEs support PCI, GTL+, SSTL-3, LVDS, and other standards. ClockLock Four-input LUT for data path and DSP functions. Product-term integration for high-speed control logic and state machines. Flexible integration of embedded memory, including CAM, RAM, ROM, FIFO, and other memory functions. |
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