The Xilinx Spartan-IIE 1.8V FPGA Family delivers users lots of logic resources, high performance, as well as a rich set of features. All these come at a very low price. This family of seven members delivers densities that range from 50,000 – 600,000 system gates. Normally, the support of system performance is usually above 200 MHz.
Some of the notable features of the abundant logic resources include a block RAM up to 288K bits, as well as a distributed RAM up to 221,184 bits. Furthermore, it has four delay-locked loops, and 19 I/O standards. Predictable, fast interconnect reveals that any successive iterations in design will keep meeting the timing requirements.
Furthermore, the Xilinx Spartan-IIE 1.8V FPGA Family is a better option to ASICs that are mask-programmed. This FPGA prevents conventional ASICs’ inherent risk, long development cycles, and the initial cost. Furthermore, the programmability of the FPGA allows upgrades in design in the field where there’s no need for hardware replacement. This is not possible with ASICs.
What are the Main Features of the Xilinx Spartan-IIE 1.8V FPGA Family
2nd Generation replacement technology
Under this, the Cost is very low. Also, densities can reach a high 6912 logic cells, as well as system gates that can reach 300,000. Furthermore, its features are streamlined based on the architecture of the Virtex-E FPGA. In addition, there is in-system unlimited reprogrammability
System Level
For the system level, there is a SelectRAM that features a hierarchical memory. Here, you will find Distributed RAM (16 bits/LUT), 4K-bit configurable dual-port true block RAM. Also, the interfaces to the external RAM are fast.
Asides from this, there is full 3.3V that follows PCI compliance at 66 MHz to 64 bits. It is also CardBus compliant. Furthermore, it has segmented low-power routing architecture. In addition to ensure observability or verification, it has complete readback ability
Also, its multiplier support is efficient and has a cascade chain to serve wide-input functions. Furthermore, it has abundant latches/registers with reset, set, and enable. Also present are four delay-locked loops (DLLs); this is to ensure advanced control of the clock. In addition, there are four global low-skew primary nets for clock distribution.
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Versatile packaging and I/O
Here, there are packages at low cost present in all possible densities. Also, there is compatibility of family footprint in all common packages
Furthermore there are 19 interface standards of high performance, which includes LVPECL and LVDS. Also there are about 120 differential input/output pairs, which can be bidirectional, output, or input. In addition, it has a hold time of zero, which simplifies the timing of the system.
Complete Support by Strong ISE development system
Here, there is complete automatic mapping, routing, and placement. Furthermore, it is incorporated with verification and design entry tools.
Also, other features include a 0.15 cost-effective micron technology, 4K-bit configurable dual-port true block RAM, Block ram of about 288K bits, 19 select I/O standards, and lots of logic resources. Also present are predictable and fast interconnects, which means that any iterations in successive designs will keep meeting any timing requirements.
In addition, there is in-system unlimited reprogrammability as well as high performance. It also has densities that can reach logic cells of about 15,552, and system gates of about 600,000.
Devices of the Xilinx Spartan-IIE 1.8V FPGA Family
Overall, the Xilinx Spartan-IIE 1.8V FPGA Family has 100 devices. Let’s consider them.
XC2S600E-FG456 XC2S600E-7FG676C XC2S600E-7FGG456C
XC2S600E-7FG456C XC2S600E-6FGG456C XC2S600E-6FGG456I
XC2S600E-6FG456C XC2S50E-6TQG144I XC2S600E-4FG456C
XC2S50E-6TQG144C XC2S50E-6PQG208I XC2S50E-6TQ144I
XC2S50E-6PQG208C XC2S50E-6FTG256C XC2S50E-6FTG256I
XC2S50E-6FT256C XC2S400E-7FG456C XC2S400E-7FGG456C
XC2S400E-6FTG256I XC2S400E-6FT256I XC2S400E-6FTG256C
XC2S400E-6FT256C XC2S400E-6FGG456C XC2S400E-6FGG456I
XC2S400E-6FG456I XC2S300E-7PQG208I XC2S400E-6FG456C
XC2S300E-7PQG208C XC2S300E-7FT256C XC2S300E-7PQ208I
XC2S300E-7FGG456C XC2S300E-6PQG208I XC2S300E-7FG456C
XC2S300E-6PQG208C XC2S300E-6PQ208C XC2S300E-6PQ208I
XC2S300E-6FTG256I XC2S300E-6FT256I XC2S300E-6FTG256C
XC2S300E-6FT256C XC2S300E-6FG456I XC2S300E-6FGG456C
XC2S300E-6FG456C XC2S300E-5FG456C XC2S300E-5FT256C
XC2S200E-7FT256C XC2S200E-6PQG208C XC2S200E-6PQG208I
XC2S200E-6PQ208I XC2S200E-6FTG256I XC2S200E-6PQ208C
XC2S200E-6FT256Q XC2S200E-6FG456C XC2S200E-6FGG456C
XC2S150E-7FTG256C XC2S150E-6PQG208I XC2S150E-7FGG456C
XC2S150E-6PQG208C XC2S150E-6FTG256I XC2S150E-6PQ208I
XC2S150E-6FTG256C XC2S150E-6FT256C XC2S150E-6FT256I
XC2S150E-6FGG456C XC2S100E-7TQG144C XC2S150E-6FG456C
XC2S100E-7PQG208C XC2S100E-6TQG144I XC2S100E-7FTG256C
XC2S100E-6TQG144C XC2S100E-6TQ144C XC2S100E-6TQ144I
XC2S100E-6PQG208C XC2S100E-6PQ208C XC2S100E-6PQ208I
XC2S100E-6FTG256I XC2S100E-6FT256I XC2S100E-6FTG256C
XC2S100E-6FT256C XC2S600E-6FGG676C XC2S100E-6FGG456C
XC2S600E-6FG676C XC2S50E-7TQ144C XC2S600E-6FG456I
XC2S50E-7PQ208C XC2S50E-7FT256C XC2S50E-7FTG256C
XC2S50E-6TQ144C XC2S50E-6PQ208C XC2S50E-6PQ208I
XC2S50E-6FT256I XC2S400E-7FT256C XC2S400E-7FTG256C
XC2S400E-6FG676C XC2S300E-7FTG256C XC2S300E-7PQ208C
XC2S300E-7FGG456I XC2S200E-7PQG208C XC2S300E-6FGG456I
XC2S200E-7FTG256C
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Features of the Xilinx Spartan-IIE 1.8V FPGA Family Devices
XC2S600E-FG456
Features of the XC2S600E-FG456
- Cost is very low
- Features are streamlined based on the architecture of the Virtex-E FPGA
- Also present are the features of the system level
- Distributed RAM (16 bits/LUT
- The SelectRAM features a hierarchical memory
- ASIC technology (2ndgeneration)
- 15 cost-effective micron technology
- 4K-bit configurable dual-port true block RAM
- Block ram of about 288K bits
- 19 select I/O standards
- Also, it has lots of logic resources
- Predictable and fast interconnects, which means that any iterations in successive designs will keep meeting any timing requirements
- Four delay-locked loops (DLLs)
- In-system unlimited reprogrammability
- Also, it has high performance
- Densities that can reach logic cells of about 15,552, and system gates of about 600,000
- Rich set of features
XC2S600E-7FGG456C
Features of the XC2S600E-7FGG456C
- Very low prices or cost
- 15 cost-effective micron technology
- 4K-bit configurable dual-port true block RAM
- Rich set of features
- Features usually streamlined with respect to the architecture of the Virtex-E FPGA
- Features of the system level also available
- Densities that can reach logic cells of about 15,552, and system gates of about 600,000
- Block ram of about 288K bits
- Select I/O standards (19 in number)
- Also, it has many logic resources
- Four delay-locked loops (DLLs)
- In-system unlimited reprogrammability
- Very good performance
- Distributed RAM (16 bits/LUT)
- The SelectRAM features a hierarchical memory
- Predictable as well as fast interconnects, indicating that any iterations in designs will keep meeting any timing requirements
- ASIC technology (2ndgeneration)
XC2S600E-7FG676C
Features of the XC2S600E-7FG676C
- Features are streamlined based on the architecture of the Virtex-E FPGA
- Distributed RAM (16 bits/LUT)
- The SelectRAM features a hierarchical memory
- ASIC technology (2ndgeneration)
- 15 cost-effective micron technology
- Lots of logic resources
- Predictable and fast interconnects, which means that any iterations in successive designs will keep meeting any timing requirements
- Cost is very low
- Also present are the features of the system level
- Four delay-locked loops (DLLs)
- In-system unlimited reprogrammability
- High performance
- Densities that can reach logic cells of about 15,552, and system gates of about 600,000
- 4K-bit configurable dual-port true block RAM
- Block ram of about 288K bits
- 19 select I/O standards
- Rich set of features
XC2S600E-7FG456C
Features of the XC2S600E-7FG456C
- Four delay-locked loops (DLLs)
- Block ram of about 288K bits
- Select I/O standards (19 in number)
- Lots of great features
- Also, it features are usually streamlined with respect to the architecture of the Virtex-E FPGA
- Features of the system level also available
- Densities that can reach logic cells of about 15,552, and system gates of about 600,000
- Many logic resources
- In-system unlimited reprogrammability
- Very good performance
- Distributed RAM (16 bits/LUT)
- The SelectRAM features a hierarchical memory
- Predictable as well as fast interconnects, indicating that any iterations in designs will keep meeting any timing requirements
- ASIC technology (2ndgeneration)
- Also, it has very low prices or cost
- 15 cost-effective micron technology
- 4K-bit configurable dual-port true block RAM
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XC2S600E-6FGG456I
Features of the XC2S600E-6FGG456I
- Features are streamlined based on the architecture of the Virtex-E FPGA
- Cost is very low
- Distributed RAM (16 bits/LUT
- Also present are the features of the system level
- ASIC technology (2ndgeneration)
- The SelectRAM features a hierarchical memory
- 15 cost-effective micron technology
- 4K-bit configurable dual-port true block RAM
- 19 select I/O standards
- Also, it has lots of logic resources
- Predictable and fast interconnects, which means that any iterations in successive designs will keep meeting any timing requirements
- Block RAM of about 288K bits
- Also, it has four delay-locked loops (DLLs)
- In-system unlimited reprogrammability
- High performance
- Densities that can reach logic cells of about 15,552, and system gates of about 600,000
XC2S600E-6FGG456C
Features of the XC2S600E-6FGG456C
- 4K-bit configurable dual-port true block RAM
- Very low prices or cost
- 15 cost-effective micron technology
- Rich set of features
- Also, it has many logic resources
- Four delay-locked loops (DLLs)
- In-system unlimited reprogrammability
- Features usually streamlined with respect to the architecture of the Virtex-E FPGA
- Block ram of about 288K bits
- Features of the system level also available
- Densities that can reach logic cells of about 15,552, and system gates of about 600,000
- Also, it has a very good performance
- Distributed RAM (16 bits/LUT)
- ASIC technology
- The SelectRAM features a hierarchical memory
- Predictable as well as fast interconnects, indicating that any iterations in designs will keep meeting any timing requirements
- Select I/O standards
XC2S600E-6FG456C
Features of the XC2S600E-6FG456C
- ASIC technology (2ndgeneration)
- Also present is 0.15 cost-effective micron technology
- Lots of logic resources
- Predictable and fast interconnects, which means that any iterations in successive designs will keep meeting any timing requirements
- Features are streamlined based on the architecture of the Virtex-E FPGA
- Distributed RAM (16 bits/LUT)
- Four delay-locked loops (DLLs)
- In-system unlimited reprogrammability
- High performance
- The SelectRAM features a hierarchical memory
- Also, cost is very low
- Also present are the features of the system level
- Furthermore, it has a block ram of about 288K bits
- 19 select I/O standards
- Also, it has rich set of features
- In addition, there are densities that can reach logic cells of about 15,552, and system gates of about 600,000
- 4K-bit configurable dual-port true block RAM
XC2S600E-4FG456C
Features of XC2S600E-4FG456C
- Very low prices or cost
- 15 cost-effective micron technology
- Also present is a 4K-bit configurable dual-port true block RAM
- Features usually streamlined with respect to the architecture of the Virtex-E FPGA
- Features of the system level also available
- Densities that can reach logic cells of about 15,552, and system gates of about 600,000
- Block ram of about 288K bits
- Select I/O standards (19 in number)
- Also, there are many logic resources
- Four delay-locked loops (DLLs)
- Also present is an in-system unlimited reprogrammability
- Also, it has a very good performance
- RAM (16 bits/LUT)
- The SelectRAM features a hierarchical memory
- Predictable as well as fast interconnects, indicating that any iterations in designs will keep meeting any timing requirements
- ASIC technology (2ndgeneration)
XC2S50E-6TQG144I
Features of the XC2S50E-6TQG144I
- In-system unlimited reprogrammability
- High performance
- Furthermore, the cost is very low
- Features are streamlined based on the architecture of the Virtex-E FPGA
- Also, the SelectRAM features a hierarchical memory
- ASIC technology (second generation)
- 15 cost-effective micron technology
- Also, it has 4K-bit configurable dual-port true block RAM
- Block ram of about 288K bits
- 19 select I/O standards
- Lots of logic resources
- Predictable and fast interconnects, which means that any iterations in successive designs will keep meeting any timing requirements
- Four delay-locked loops (DLLs)
- Also present are the features of the system level
- RAM (16 bits/LUT)
- Densities that can reach logic cells of about 15,552, and system gates of about 600,000
XC2S50E-6TQG144C
Features of XC2S50E-6TQG144C
- Distributed RAM (16 bits/LUT)
- The SelectRAM features a hierarchical memory
- Also present is 0.15 cost-effective micron technology
- Lots of logic resources
- Predictable and fast interconnects, which means that any iterations in successive designs will keep meeting any timing requirements
- Features are streamlined based on the architecture of the Virtex-E FPGA
- In-system unlimited reprogrammability
- High performance
- Also, cost is very low
- Four delay-locked loops (DLLs)
- ASIC technology (2ndgeneration)
- Also present are the features of the system level
- Furthermore, it has a block ram of about 288K bits
- 19 select I/O standards
- Rich set of features
- In addition, there are densities that can reach logic cells of about 15,552, and system gates of about 600,000
- Also, it is 4K-bit configurable dual-port true block RAM
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XC2S50E-6TQ144I
Features of XC2S50E-6TQ144I
- Very low prices or cost
- 15 cost-effective micron technology
- Also present is a 4K-bit configurable dual-port true block RAM
- Features usually streamlined with respect to the architecture of the Virtex-E FPGA
- Features of the system level also available
- Densities that can reach logic cells of about 15,552, and system gates of about 600,000
- Block ram of about 288K bits
- Select I/O standards (19 in number)
- Also, there are many logic resources
- Four delay-locked loops (DLLs)
- Also present is an in-system unlimited reprogrammability
- Very good performance
- Distributed RAM (16 bits/LUT)
- The SelectRAM features a hierarchical memory
- Predictable as well as fast interconnects, indicating that any iterations in designs will keep meeting any timing requirements
- ASIC technology (2ndgeneration)
XC2S50E-6PQG208I
Features of XC2S50E-6PQG208I
- Features of the system level are available
- Densities that can reach logic cells of about 15,552, and system gates of about 600,000
- Select I/O standards (19 in number)
- Many logic resources
- Four delay-locked loops (DLLs)
- Also, it has very low prices or cost
- Rich set of features
- Features usually streamlined with respect to the architecture of the Virtex-E FPGA
- In-system unlimited reprogrammability
- Block RAM of about 288K bits
- Also, it has very good performance
- 15 cost-effective micron technology
- 4K-bit configurable dual-port true block RAM
- RAM (16 bits/LUT)
- The SelectRAM features a hierarchical memory
- Furthermore, it is predictable as well as fast interconnects, indicating that any iterations in designs will keep meeting any timing requirements
- ASIC technology (2ndgeneration)
Architectural Description of the Xilinx Spartan-IIE 1.8V FPGA Family
The Xilinx Spartan-IIE 1.8V FPGA Family is made of five main configurable elements:
- Input/Output blocks (IOBs) offer the interface that forms between the internal logic and the package pins.
- Configurable logic blocks (CLBs) offer those functional elements necessary for the construction of most logic.
- Dedicated block memories (RAM), with each having 4096 bits.
- The Clock DLLs, which ensures control of the clock domain and compensation for clock-distribution delay.
- Multi-level versatile interconnect structure
Now, the CLBs make up the main logic structure having an easy access into all the routing and support structures. Furthermore, the location of the input/output blocks is seen around all the memory and logic elements for quick and easy routing of the signals both off and on the chip.
In addition, the values that are stored in the static or stationary memory cells play a vital role in controlling the configurable interconnect resources and logic elements. Furthermore, on power-up, these values also load in the memory cells. Also, they can reload, when it becomes necessary to alter the device’s function.
Now, let us discuss each element in detail.
Input/Output Block (IOBs)
The Xilinx Spartan-IIE 1.8V FPGA Family IOB features outputs and inputs, which support different Input/Output signaling standards. Furthermore, these outputs and inputs of high-speed can support different bus interfaces and memory.
Furthermore, the functions of the three registers serve as latches that are level-sensitive or as D-type edge-triggered flip-flops. Also, each input output block features a clock signal, which these three registers share and does not depend on the Clock Enable signals for every register.
Asides from the CE and CLK control signals, all three registers usually share a Set and Reset (SR). Furthermore, for every register, you can configure the signal independently as an asynchronous Reset, a synchronous Set, an asynchronous Clear, or an asynchronous Preset.
One feature that doesn’t reflect in the diagram of the block, but the software controls it is known as polarity control. Also, the buffers of the output and input, as well as all the control signals of the input output blocks have polarity controls that are independent.
Optional pull-down and pull-up resistors as well as an optional circuit (weak-keeper) are usually attached to every user’s input/output pad. Before configuration, those outputs that will play no role in the configuration will have to be forced into a state of high impedance.
Furthermore, the weak-keeper circuits and pull-down resistors are inactive; however, optionally inputs may be pulled up. Pull-up resistors’ activation before configuration is usually controlled globally by the pins for the configuration mode.
Also, if you don’t activate these pull-up resistors, the pins will end up floating. Furthermore, external pull-down or pull-up resistors have to be given on those pins needed to stay at a logic level that is well-defined before configuration.
Furthermore, all the pads get some protection against any damage resulting from any over-voltage transients and electrostatic discharge.
Configurable Logic Block
The logic cell is regarded as the main building block of the Xilinx Spartan-IIE 1.8V FPGA Configurable logic block. Furthermore, an LC is made up of a generator with 4-input functions, storage element, and carry logic.
Also, the function generator’s output in every logic cells helps in driving the flip-flop’s D input or the CLB output. Each of the configurable logic blocks of the Xilinx Spartan-IIE 1.8V FPGA is made up of four LCs, which are organized in two slices that are similar.
Also, asides from the four main LCs, the CLB of the Xilinx Spartan-IIE 1.8V FPGA Family is made up of logic, which combines the function generators in order to deliver functions of either six of five inputs.
Block RAM
The Xilinx Spartan-IIE 1.8V FPGA Family integrates several RAM memories with large block. These serve as a complement to the distributed Look-Up Tables, which offer memory structures that are shallow and implemented in Configurable logic blocks.
The organizing of the Block RAM’s memory blocks usually come in columns. Most devices from this family are composed of two types of such a column. Furthermore, the block RAM having four columns can be seen in XC2S400E.
The columns extend the chip’s full height. In addition, each of the memory blocks are four configurable logic blocks (CLBs) high, so also, a device having 16 configurable logic blocks high will have 4 memory blocks for each column, that will be eight blocks in total
Each cell of the block RAM is 100% dual-ported synchronous 4096-bit RAM that has control signals that are independent for each port. Furthermore, you can configure both ports’ data widths independently, offering bus-width in-built conversion.
In addition, the block RAM of the Xilinx Spartan-IIE 1.8V FPGA Family includes serious routing to offer an effective interface with CLBs as well as other block RAMs.
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Programmable Routing
Programmable routing can be referred to as the longest possible delay path, which restricts any design’s speed. So also, the routing architecture of the Spartan-IIE FPGA, as well as its place-and-route software have been defined jointly in order to reduce delays of long path and deliver the best possible performance of the system.
Also, with joint optimization, the time for design compilation is also reduced because of the software-friendly nature of the architecture. Furthermore, the cycles for design are reduced as a result of shorter time for design iteration.
Clock Distribution
It is known that the Xilinx Spartan-IIE 1.8V FPGA family offers low-skew, high-speed clock distribution via the primary resources for global routing.
There will be 4 global buffers. You will find two at the device’s top center, while two will be found at the bottom center. All these help in driving the four main global nets, which also helps in driving all possible clock pins.
You will get four clock pads. Each of these pads are adjacent to every global buffer. Furthermore, the global buffer’s input is chosen either from the purpose of routing signals or from the pads.
Boundary Scan
Operations for boundary-scan work independently of each IOB configuration. Furthermore, no package type affects them. Also, all the input output blocks, which includes those that are unbonded, are handled as 3-state independent bidirectional pins present in one scan chain.
Furthermore, the bidirectional test retention capability once configuration is done helps in facilitating the external interconnections’ testing.
Also, the public instructions of the boundary scan will be available even before configuration. However, this exempts USER2 and USER1. Once configuration is completed, the instructions stay available coupled with other instructions of the USERCODE which were installed when the configuration was in progress.
While the instructions PRELOAD/ SAMPLE and BYPASS are available when configuration is ongoing, one important recommendation is that the operations of the boundary-scan are not carried out when this transitional phase is ongoing. Asides from the test instructions, the circuitry of the boundary-scan is useful in configuring the FPGA. It also helps in reading back the data.
In order to facilitate the scan chains, three outputs are provided by the User Register. These outputs are Shift, Update, and Reset, which represents the states in the internal state boundary-scan machine.
Conclusion
By now, you should understand what the Xilinx Spartan-IIE 1.8V FPGA Family is and what they offer. This family delivers users lots of logic resources, high performance, as well as a rich set of features. All these come at a very low price. Also it has 100 devices and each of them come with its own features. If you have any questions, feel free to reach out to us here. We will be glad to help you out.
