ISPLSI2096VL-100LTN128 of Lattice SuperFAST High Density PLD

ISPLSI2096VL-100LTN128 FPGAs Overview

The ispLSI 2096VL is a High Density Programmable Logic Device containing 96 Registers, six Dedicated Input pins, three Dedicated Clock Input pins, two dedicated Global OE input pins and a Global Routing Pool (GRP). The GRP provides complete interconnectivity between all of these elements. The ispLSI 2096VL features in-system programmability through the Boundary Scan Test Access Port (TAP) and is 100% IEEE 1149.1 Boundary Scan Testable. The ispLSI 2096VL offers nonvolatile reprogrammability of the logic, as well as the interconnect to provide truly reconfigurable systems.

The basic unit of logic on the ispLSI 2096VL device is the Generic Logic Block (GLB). The GLBs are labeled A0, A1 .. C7 (see ISPLSI2096VL-100LTN128 Datasheet). There are a total of 24 GLBs in the ispLSI 2096VL device. Each GLB is made up of four macrocells. Each GLB has 18 inputs, a programmable AND/OR/Exclusive OR array, and four outputs which can be configured to be either combinatorial or registered. Inputs to the GLB come from the GRP and dedicated inputs. All of the GLB outputs are brought back into the GRP so that they can be connected to the inputs of any GLB on the device.

The devices also have 96 I/O cells, each of which is directly connected to an I/O pin. Each I/O cell can be individually programmed to be a combinatorial input, output or bi-directional I/O pin with 3-state control, and the output drivers can source 4 mA or sink 8 mA. Each output can be programmed independently for fast or slow output slew rate to minimize overall output switching noise. Device pins can be safely driven to 3.3V signal levels to support mixed-voltage systems.

Eight GLBs, 32 I/O cells, two dedicated inputs and two ORPs are connected together to make a Megablock (see Figure 1). The outputs of the eight GLBs are connected to a set of 32 universal I/O cells by the two ORPs. Each ispLSI 2096VL device contains three Megablocks.

The GRP has as its inputs, the outputs from all of the GLBs and all of the inputs from the bi-directional I/O cells. All of these signals are made available to the inputs of the GLBs. Delays through the GRP have been equalized to minimize timing skew.

Clocks in the ispLSI 2096VL device are selected using the dedicated clock pins. Three dedicated clock pins (Y0, Y1, Y2) or an asynchronous clock can be selected on a GLB basis. The asynchronous or Product Term clock can be generated in any GLB for its own clock.

Programmable Open-Drain Outputs

In addition to the standard output configuration, the outputs of the ispLSI 2096VL are individually programmable, either as a standard totem-pole output or an open-drain output. The totem-pole output drives the specified Voh and Vol levels, whereas the open-drain output drives only the specified Vol. The Voh level on the open-drain output depends on the external loading and pull-up. This output configuration is controlled by a programmable fuse. The default configuration is a totem-pole configuration. The open-drain/totem-pole option is selectable through the Lattice software tools.

Features

• SuperFAST HIGH DENSITY PROGRAMMABLE LOGIC
— 4000 PLD Gates
— 96 I/O Pins, Six Dedicated Inputs
— 96 Registers
— High Speed Global Interconnect
— Wide Input Gating for Fast Counters, State Machines, Address Decoders, etc.
— Small Logic Block Size for Random Logic
— 100% Functional, JEDEC and Pinout Compatible with ispLSI 2096V and 2096VE Devices
• 2.5V LOW VOLTAGE 2096 ARCHITECTURE
— Interfaces with Standard 3.3V Devices (Inputs and I/Os are 3.3V Tolerant)
— 85 mA Typical Active Current
• HIGH PERFORMANCE E2 CMOS TECHNOLOGY
— fmax = 165 MHz Maximum Operating Frequency
— tpd = 5.5 ns Propagation Delay
— Electrically Erasable and Reprogrammable
— Non-Volatile
— 100% Tested at Time of Manufacture
— Unused Product Term Shutdown Saves Power
• IN-SYSTEM PROGRAMMABLE
— 2.5V In-System Programmability (ISP) Using Boundary Scan Test Access Port (TAP)
— Open-Drain Output Option for Flexible Bus Interface Capability, Allowing Easy Implementation of Wired-OR or Bus Arbitration Logic
— Increased Manufacturing Yields, Reduced Time-toMarket and Improved Product Quality
— Reprogram Soldered Devices for Faster Prototyping
• 100% IEEE 1149.1 BOUNDARY SCAN TESTABLE
• THE EASE OF USE AND FAST SYSTEM SPEED OF PLDs WITH THE DENSITY AND FLEXIBILITY OF FPGAS
— Enhanced Pin Locking Capability
— Three Dedicated Clock Input Pins
— Synchronous and Asynchronous Clocks
— Programmable Output Slew Rate Control
— Flexible Pin Placement
— Optimized Global Routing Pool Provides Global Interconnectivity

FAQ

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