Altera’s Flexible Logic Element MatriX (FLEX®) family combines the benefits of both erasable programmable logic devices (EPLDs) and fieldprogrammable gate arrays (FPGAs). The FLEX 8000 device family is ideal for a variety of applications because it combines the fine-grained architecture and high register count characteristics of FPGAs with the high speed and predictable interconnect delays of EPLDs. Logic is implemented in LEs that include compact 4-input look-up tables (LUTs) and programmable registers. High performance is provided by a fast, continuous network of routing resources.
FLEX 8000 devices provide a large number of storage elements for applications such as digital signal processing (DSP), wide-data-path manipulation, and data transformation. These devices are an excellent choice for bus interfaces, TTL integration, coprocessor functions, and high-speed controllers. The high-pin-count packages can integrate multiple 32-bit buses into a single device.
All FLEX 8000 device packages provide four dedicated inputs for synchronous control signals with large fan-outs. Each I/O pin has an associated register on the periphery of the device. As outputs, these registers provide fast clock-to-output times; as inputs, they offer quick setup times.
The logic and interconnections in the FLEX 8000 architecture are configured with CMOS SRAM elements. FLEX 8000 devices are configured at system power-up with data stored in an industry-standard parallel EPROM or an Altera serial configuration devices, or with data provided by a system controller. Altera offers the EPC1, EPC1213, EPC1064, and EPC1441 configuration devices, which configure FLEX 8000 devices via a serial data stream. Configuration data can also be stored in an industry-standard 32 K × 8 bit or larger configuration device, or downloaded from system RAM. After a FLEX 8000 device has been configured, it can be reconfigured in-circuit by resetting the device and loading new data. Because reconfiguration requires less than 100 ms, realtime changes can be made during system operation.
Feature
■ Low-cost, high-density, register-rich CMOS programmable logic device (PLD) family (see Table 1)
– 2,500 to 16,000 usable gates
– 282 to 1,500 registers
■ System-level features
– In-circuit reconfigurability (ICR) via external configuration devices or intelligent controller
– Fully compliant with the peripheral component interconnect Special Interest Group (PCI SIG) PCI Local Bus Specification, Revision 2.2 for 5.0-V operation
– Built-in Joint Test Action Group (JTAG) boundary-scan test (BST) circuitry compliant with IEEE Std. 1149.1-1990 on selected devices
– MultiVoltTM I/O interface enabling device core to run at 5.0 V, while I/O pins are compatible with 5.0-V and 3.3-V logic levels
– Low power consumption (typical specification is 0.5 mA or less in standby mode)
■ Flexible interconnect
– FastTrack® Interconnect continuous routing structure for fast, predictable interconnect delays
– Dedicated carry chain that implements arithmetic functions such as fast adders, counters, and comparators (automatically used by software tools and megafunctions)
– Dedicated cascade chain that implements high-speed, high-fan-in logic functions (automatically used by software tools and megafunctions)
– Tri-state emulation that implements internal tri-state nets
■ Powerful I/O pins
■ Programmable output slew-rate control reduces switching noise
