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Advance Product Specification 1
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General Description
The Spartan®-6 family provides leading system integration capabilities with the lowest total cost for high-volume applications. The
thirteen-member family delivers expanded densities ranging from 3,400 to 148,000 logic cells, with half the power consumption of previous
Spartan families and faster, more comprehensive connectivity. Built on a mature 45 nm low-power copper process technology that delivers
the optimal balance of cost, power, and performance, the Spartan-6 family offers a new, more efficient, dual-register 6-input look-up table
(LUT) logic and a rich selection of built-in system-level blocks. These include 18 Kb (2 x 9 Kb) block RAMs, second generation DSP48A1
slices, SDRAM memory controllers, enhanced mixed-mode clock management blocks, SelectIO™ technology, power-optimized high-
speed serial transceiver blocks, PCI Express™ compatible Endpoint blocks, advanced system-level power management modes, auto-
detect configuration options, and enhanced IP security with AES and Device DNA protection. These features provide a low-cost
programmable alternative to custom ASIC products with unprecedented ease-of-use. Spartan-6 FPGAs offer the best solution for high-
volume logic designs, consumer-oriented DSP designs, and cost-sensitive embedded applications. Spartan-6 FPGAs are the
programmable silicon foundation for Targeted Design Platforms that deliver integrated software and hardware components to enable
designers to focus on innovation as soon as their development cycle begins.
Summary of Spartan-6 FPGA Features
•Spartan-6 Family:
−Spartan-6 LX FPGA: Logic optimized
−Spartan-6 LXT FPGA: High-speed serial connectivity
•Designed for low cost
−Multiple efficient integrated blocks
−Optimized selection of I/O standards
−Staggered pads
−High volume plastic wire-bonded packages
•Low static and dynamic power
−45 nm process optimized for cost and low power
−Hibernate power-down mode for zero power
−Suspend mode maintains state and configuration with
multi-pin wake-up, control enhancement
−Lower-power 1.0V core voltage (LX FPGAs, -1L only)
−High performance 1.2V core voltage (LX and LXT
FPGAs, -2 and -3 speed grades)
•Multi-voltage, multi-standard SelectIO banks
−Up to 1050 Mb/s data transfer rate per differential I/O
−Selectable output drive, up to 24 mA per pin
−3.3V to 1.2V I/O standards and protocols
−Low-cost HSTL and SSTL memory interfaces
−Hot swap compliance
−Adjustable I/O slew rates to improve signal integrity
•High-speed GTP serial transceivers in the LXT FPGAs
−Up to 3.125 Gb/s
−High speed interfaces including: Serial ATA, Aurora,
1G Ethernet, PCI Express, OBSAI, CPRI, EPON,
GPON, DisplayPort, and XAUI
•Integrated Endpoint block for PCI Express designs (LXT)
•Low cost PCI® technology support compatible with the 32 bit,
33 MHz specification
•Efficient DSP48A1 slices
−High-performance arithmetic and signal processing
−Fast 18 x 18 multiplier and 48-bit accumulator
−Pipelining and cascading capability
−Pre-adder to assist filter applications
•Integrated Memory Controller blocks
−DDR, DDR2, DDR3, and LPDDR support
−Data rates up to 800 Mb/s (12.8 Gb/s peak bandwidth)
−Multi-port bus structure with independent FIFO to reduce
design timing issues
•Abundant logic resources with increased logic capacity
−Optional shift register or distributed RAM support
−Efficient 6-input LUTs improve performance and
minimize power
−LUT with dual flip-flops for pipeline centric applications
•Block RAM with a wide range of granularity
−Efficient block RAM
−Fast block RAM with byte write enable
−18 Kb blocks that can be optionally programmed as two
independent 9 Kb block RAMs
•Clock Management Tile (CMT) for enhanced performance
−Low noise, flexible clocking
−Digital Clock Managers (DCMs) eliminate clock skew
and duty cycle distortion
−Phase-Locked Loops (PLLs) for low-jitter clocking
−Frequency synthesis with simultaneous multiplication,
division, and phase shifting
−Sixteen low-skew global clock networks
•Simplified configuration, supports low-cost standards
−2-pin auto-detect configuration
−Broad third-party SPI (up to x4) and NOR Flash support
−Feature rich Xilinx Platform Flash with JTAG
−MultiBoot support for remote upgrade with multiple
bitstreams, using watchdog protection
•Enhanced security for design protection
−Unique Device DNA identifier for design authentication
−AES bitstream encryption in the larger devices
•Faster embedded processing with enhanced, low cost,
MicroBlaze™ soft processor
•Industry-leading IP and reference designs
10
Spartan-6 Family Overview
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Spartan-6 Family Overview
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Advance Product Specification 2
Spartan-6 FPGA Feature Summary
Table 1: Spartan-6 FPGA Feature Summary by Device
Device Logic
Cells(1)
Configurable Logic Blocks (CLBs)
DSP48A1
Slices(3)
Block RAM Blocks
CMTs(5) Memory
Controller
Blocks
Endpoint
Blocks for
PCI Express
Maximum
GTP
Transceivers
Total
I/O
Banks
Max
User
I/OSlices(2) Flip-Flops
Max
Distributed
RAM (Kb)
18 Kb(4) Max (Kb)
XC6SLX4 3,840 600 4,800 75 8 12 216 2 0 0 0 4 120
XC6SLX9 9,152 1,430 11,440 90 16 32 576 2 2 0 0 4 200
XC6SLX16 14,579 2,278 18,224 136 32 32 576 2 2 0 0 4 232
XC6SLX25 24,051 3,750 30,064 229 38 52 936 2 2 0 0 4 266
XC6SLX45 43,661 6,822 54,576 401 58 116 2,088 4 2 0 0 4 358
XC6SLX75 74,637 11,662 93,296 692 132 172 3,096 6 4 0 0 6 400
XC6SLX100 101,261 15,822 126,576 976 180 268 4,824 6 4 0 0 6 480
XC6SLX150 147,443 23,038 184,304 1,355 180 268 4,824 6 4 0 0 6 570
XC6SLX25T 24,051 3,750 30,064 229 38 52 936 2 2 1 2 4 250
XC6SLX45T 43,661 6,822 54,576 401 58 116 2,088 4 2 1 4 4 296
XC6SLX75T 74,637 11,662 93,296 692 132 172 3,096 6 4 1 8 6 320
XC6SLX100T 101,261 15,822 126,576 976 180 268 4,824 6 4 1 8 6 490
XC6SLX150T 147,443 23,038 184,304 1,355 180 268 4,824 6 4 1 8 6 530
Notes:
1. Spartan-6 FPGA logic cell ratings reflect the increased logic cell capability offered by the new 6-input LUT architecture.
2. Each Spartan-6 FPGA slice contains four LUTs and eight flip-flops.
3. Each DSP48A1 slice contains an 18 x 18 multiplier, an adder, and an accumulator.
4. Block RAMs are fundamentally 18 Kb in size. Each block can also be used as two independent 9 Kb blocks.
5. Each CMT contains two DCMs and one PLL.
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Advance Product Specification 3
Spartan-6 FPGA Device-Package Combinations and Available I/Os
Spartan-6 FPGA package combinations with the available I/Os and GTP transceivers per package are shown in Ta bl e 2 .
Due to the transceivers, the LX and LXT pinouts are not compatible.
Configuration
Spartan-6 FPGAs store the customized configuration data in SRAM-type internal latches. The number of configuration bits
is between 2 Mb and 33 Mb depending on device size but independent of the specific user-design implementation, unless
compression mode is used. The configuration storage is volatile and must be reloaded whenever the FPGA is powered up.
This storage can also be reloaded at any time by pulling the PROGRAM_B pin Low. Several methods and data formats for
loading configuration are available.
Bit-serial configurations can be either master serial mode, where the FPGA generates the configuration clock (CCLK) signal,
or slave serial mode, where the external configuration data source also clocks the FPGA. For byte-wide configurations,
master SelectMAP mode generates the CCLK signal while slave SelectMAP mode receives the CCLK signal for the 8- and
16-bit-wide transfer. In master serial mode, the beginning of the bitstream can optionally switch the clocking source to an
external clock, which can be faster or more precise than the internal clock. The available JTAG pins use boundary-scan
protocols to load bit-serial configuration data.
Table 2: Spartan-6 Device-Package Combinations and Maximum Available I/Os
Package CPG196(1) TQG144(1) CSG225(2) FT(G)256(3) CSG324 FG(G)484(3,4) CSG484(4) FG(G)676(3) FG(G)900(3)
Size(mm) 8x8 20x20 13x13 17x17 15x15 23x23 19x19 27x27 31x31
Pitch (mm) 0.5 0.5 0.8 1.0 0.8 1.0 0.8 1.0 1.0
Device User I/O User I/O User I/O User I/O GTPs User
I/O GTPs User
I/O GTPs User
I/O GTPs User
I/O GTPs User
I/O
XC6SLX4 100 100 120
XC6SLX9 100 102 160 186 NA 200
XC6SLX16 100 160 186 NA 232
XC6SLX25 186 NA 226 NA 266
XC6SLX45 NA 218 NA 316 NA 310 NA 358
XC6SLX75 NA TBD NA 310 NA 400
XC6SLX100 NA 326 NA 320 NA 480
XC6SLX150 NA 338 NA 330 NA 498 NA 570
XC6SLX25T 2 190 2 250
XC6SLX45T 4 190 4 296 4 290
XC6SLX75T 4 TBD 4 290 8 320
XC6SLX100T 4 296 4 290 8 376 8 490
XC6SLX150T 4 296 4 290 8 396 8 530
Notes:
1. There is no memory controller on the devices in these packages.
2. Memory controller block support is x8 on the XC6SLX9 and XC6SLX16 devices. There is no memory controller in the XC6SLX4.
3. These devices are available in both Pb and Pb-free (additional G) packages as standard ordering options.
4. These packages support two of the four memory controllers in the XC6SLX75, XC6SLX75T, XC6SLX100, XC6SLX100T, XC6SLX150, and
XC6SLX150T devices.
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Advance Product Specification 4
The bitstream configuration information is generated by the ISE™ software using a program called BitGen. The
configuration process typically executes the following sequence:
•Detects power-up (power-on reset) or PROGRAM_B when Low.
•Clears the whole configuration memory.
•Samples the mode pins to determine the configuration mode: master or slave, bit-serial or parallel.
•Loads the configuration data starting with the bus-width detection pattern followed by a synchronization word, checks
for the proper device code, and ends with a cyclic redundancy check (CRC) of the complete bitstream.
•Starts a user-defined sequence of events: releasing the internal reset (or preset) of flip-flops, optionally waiting for the
DCMs and/or PLLs to lock, activating the output drivers, and transitioning the DONE pin to High.
Spartan-6 FPGAs support MultiBoot configuration, where two or more FPGA configuration bitstreams can be stored by a
single configuration source. The FPGA application controls which configuration to load next and when to load it.
Spartan-6 FPGAs also include a unique, factory-programmed Device DNA identifier useful for tracking purposes, anti-
cloning designs, or IP protection. In the largest devices, bitstreams can be copy protected using AES encryption.
Dynamic Reconfiguration Port
The dynamic reconfiguration port (DRP) gives the system designer easy access to configuration bits and status registers for
the GTP transceivers.
The DRP behaves like memory-mapped registers, and can access and modify block-specific configuration bits as well as
status and control registers.
Readback
Most configuration data can be read back without affecting the system’s operation.
CLBs, Slices, and LUTs
Each configurable logic block (CLB) in Spartan-6 FPGAs consists of two slices, arranged side-by-side as part of two vertical
columns. There are three types of CLB slices in the Spartan-6 architecture: SLICEM, SLICEL, and SLICEX. Each slice
contains four LUTs, eight flip-flops, and miscellaneous logic. The LUTs are for general-purpose combinatorial and
sequential logic support. Synthesis tools take advantage of these highly efficient logic, arithmetic, and memory features.
Expert designers can also instantiate them.
SLICEM
One quarter (25%) of Spartan-6 slices are SLICEMs. Each of the four SLICEM LUTs can be configured as either a 6-input
LUT with one output, or as dual 5-input LUTs with identical 5-bit addresses and two independent outputs. These LUTs can
also be used as distributed 64-bit RAM with 64 bits or two times 32 bits per LUT, as a single 32-bit shift register (SRL32), or
as two 16-bit shift registers (SRL16s) with addressable length. Each LUT output can be registered in a flip-flop within the
CLB. For arithmetic operations, a high-speed carry chain propagates carry signals upwards in a column of slices.
SLICEL
One quarter (25%) of Spartan-6 slices are SLICELs, which contain all the features of the SLICEM except the memory/shift
register function.
SLICEX
One half (50%) of Spartan-6 slices are SLICEXs. The SLICEXs have the same structure as SLICELs except the arithmetic
carry option and the wide multiplexers.
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Clock Management
Each Spartan-6 FPGA has up to six CMTs, each consisting of two DCMs and one PLL, which can be used individually or
concatenated.
DCM
The DCM provides four phases of the input frequency (CLKIN): shifted 0°, 90°, 180°, and 270° (CLK0, CLK90, CLK180, and
CLK270). It also provides a doubled frequency CLK2X and its complement CLK2X180. The CLKDV output provides a
fractional clock frequency that can be phase-aligned to CLK0. The fraction is programmable as every integer from 2 to 16,
as well as 1.5, 2.5, 3.5 . . . 7.5. CLKIN can optionally be divided by 2. The DCM can be a zero-delay clock buffer when a clock
signal drives CLKIN, while the CLK0 output is fed back to the CLKFB input.
Frequency Synthesis
Independent of the basic DCM functionality, the frequency synthesis outputs CLKFX and CLKFX180 can be programmed to
generate any output frequency that is the DCM input frequency (FIN) multiplied by M and simultaneously divided by D, where
M can be any integer from 2 to 32 and D can be any integer from 1 to 32.
Phase Shifting
With CLK0 connected to CLKFB, all nine CLK outputs (CLK0, CLK90, CLK180, CLK270, CLK2X, CLK2X180, CLKDV,
CLKFX, and CLKFX180) can be shifted by a common amount, defined as any integer multiple of a fixed delay. A fixed DCM
delay value (fraction of the input period) can be established by configuration and can also be incremented or decremented
dynamically.
Spread-Spectrum Input
The DCM can accept and track typical spread-spectrum clock inputs, provided they abide by the input clock specifications
listed in the Spartan-6 data sheet.
PLLs
The PLL can serve as a frequency synthesizer for a wider range of frequencies and as a jitter filter for incoming clocks in
conjunction with the DCMs. The heart of the PLL is a voltage-controlled oscillator (VCO) with a frequency range of
400 MHz to 1000 MHz, thus spanning more than one octave. Three sets of programmable frequency dividers (D, M, and O)
adapt the VCO to the required application.
The pre-divider D (programmable by configuration) reduces the input frequency and feeds one input of the traditional PLL
phase comparator. The feedback divider (programmable by configuration) acts as a multiplier because it divides the VCO
output frequency before feeding the other input of the phase comparator. D and M must be chosen appropriately to keep the
VCO within its controllable frequency range.
The VCO has eight equally spaced outputs (0°, 45°, 90°, 135°, 180°, 225°, 270°, and 315°). Each can be selected to drive
one of the six output dividers, O0 to O5 (each programmable by configuration to divide by any integer from 1 to 128).
Clock Distribution
Each Spartan-6 FPGA provides abundant clock lines to address the different clocking requirements of high fanout, short
propagation delay, and extremely low skew.
Global Clock Lines
In each Spartan-6 FPGA, 16 global-clock lines have the highest fanout and can reach every flip-flop clock. Global clock lines
must be driven by global clock buffers, which can also perform glitchless clock multiplexing and the clock enable function.
Global clocks are often driven from the CMTs, which can completely eliminate the basic clock distribution delay.
I/O Clocks
I/O clocks are especially fast and serve only the localized input and output delay circuits and the I/O serializer/deserializer
(SERDES) circuits, as described in the I/O Logic section.
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Block RAM
Every Spartan-6 FPGA has between 12 and 268 dual-port block RAMs, each storing 18 Kbits. Each block RAM has two
completely independent ports that share only the stored data.
Synchronous Operation
Each memory access, whether read or write, is controlled by the clock. All inputs, data, address, clock enables, and write
enables are registered. The data output is always latched, retaining data until the next operation. An optional output data
pipeline register allows higher clock rates at the cost of an extra cycle of latency.
During a write operation in dual-port mode, the data output can reflect either the previously stored data, the newly written
data, or remain unchanged.
Programmable Data Width
•Each port can be configured as 16K × 1, 8K × 2, 4K × 4, 2K × 9 (or 8), 1K × 18 (or 16), or 512 x 36 (or 32).
•The x9, x18, and x36 configurations include parity bits. The two ports can have different aspect ratios.
•Each block RAM can be divided into two completely independent 9 Kb block RAMs that can each be configured to any
aspect ratio from 8K x 1 to 256 x 36.
•In 9 Kb block RAMs, only simple dual-port mode can provide data widths of >18 bits. In this mode, one port is
dedicated to read operation and the other port is dedicated to write operation. The full freedom to mix port data width
values is retained, but there is no read output during write. The 18 Kb RAM has no dual-port data width limitation.
Memory Controller Block
Most Spartan-6 devices include dedicated memory controller blocks (MCBs), each targeting a single-chip DRAM (either
DDR, DDR2, DDR3, or LPDDR), and supporting access rates of up to 800 Mb/s.
The MCB has dedicated routing to predefined FPGA I/Os. If the MCB is not used, these I/Os are available as general
purpose FPGA I/Os. The memory controller offers a complete multi-port arbitrated interface to the logic inside the
Spartan-6 FPGA. Commands can be pushed, and data can be pushed to and pulled from independent built-in FIFOs, using
conventional FIFO control signals. The multi-port memory controller can be configured in many ways. An internal 32-, 64-,
or 128-bit data interface provides a simple and reliable interface to the MCB.
The MCB can be connected to 4-, 8-, or 16-bit external DRAM. The MCB, in many applications, provides a faster DRAM
interface compared to traditional internal data buses, which are wider and are clocked at a lower frequency. The FPGA logic
interface can be flexibly configured irrespective of the physical memory device.
Digital Signal Processing—DSP48A1 Slice
DSP applications use many binary multipliers and accumulators, best implemented in dedicated DSP slices. All
Spartan-6 FPGAs have many dedicated, full-custom, low-power DSP slices, combining high speed with small size, while
retaining system design flexibility.
Each DSP48A1 slice consists of a dedicated 18 × 18 bit two's complement multiplier and a 48-bit accumulator, both capable
of operating at 250 MHz. The DSP48A1 slice provides extensive pipelining and extension capabilities that enhance speed
and efficiency of many applications, even beyond digital signal processing, such as wide dynamic bus shifters, memory
address generators, wide bus multiplexers, and memory-mapped I/O register files. The accumulator can also be used as a
synchronous up/down counter. The multiplier can perform barrel shifting.
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Input/Output
The number of I/O pins varies from 120 to 570, depending on device and package size. Each I/O pin is configurable and can
comply with a large number of standards, using up to 3.3V. The Spartan-6 FPGA SelectIO Resources User Guide describes
the I/O compatibilities of the various I/O options. With the exception of supply pins and a few dedicated configuration pins,
all other package pins have the same I/O capabilities, constrained only by certain banking rules. All user I/O is bidirectional;
there are no input-only pins.
All I/O pins are organized in banks, with four banks on the smaller devices and six banks on the larger devices. Each bank
has several common VCCO output supply-voltage pins, which also powers certain input buffers. Some single-ended input
buffers require an externally applied reference voltage (VREF). There are several dual-purpose VREF-I/O pins in each bank.
In a given bank, when I/O standard calls for a VREF voltage, each VREF pin in that bank must be connected to the same
voltage rail and can not be used as an I/O pin.
I/O Electrical Characteristics
Single-ended outputs use a conventional CMOS push/pull output structure, driving High towards VCCO or Low towards
ground, and can be put into high-Z state. Many I/O features available to the system designer to optionally invoke each I/O in
their design, such as weak internal pull-up and pull-down resistors, strong internal split-termination input resistors,
adjustable output drive-strengths and slew-rates, and differential termination resistors. See the Spartan-6 FPGA SelectIO
Resources User Guide for more details available options for each I/O standard.
I/O Logic
Input and Output Delay
This section describes the available logic resources connected to the I/O interfaces. All inputs and outputs can be configured
as either combinatorial or registered. Double data rate (DDR) is supported by all inputs and outputs. Any input or output can
be individually delayed by up to 256 increments of ~100 ps each. This is implemented as IODELAY2. The identical delay
value is available either for data input or output. For a bidirectional data line, the transfer from input to output delay is
automatic. The number of delay steps can be set by configuration and can also be incremented or decremented while in use.
Because these tap delays vary with supply voltage, process, and temperature, an optional calibration mechanism is built into
each IODELAY2:
•In the simple system synchronous case, a data input delay value that guarantees zero data hold time is inserted
automatically, without user intervention.
•For source synchronous designs where more accuracy is required, the calibration mechanism can (optionally)
determine dynamically how many taps are needed to delay data by one full I/O clock cycle, and then programs the
IODELAY2 with 50% of that value, thus centering the I/O clock in the middle of the data eye.
•A special mode is available only for differential inputs, which uses a phase-detector mechanism to determine whether
the incoming data signal is being accurately sampled in the middle of the eye. The results from the phase-detector logic
can be used to either increment or decrement the input delay, one tap at a time, to ensure error-free operation at very
high bit rates.
ISERDES and OSERDES
Many applications combine high-speed bit-serial I/O with slower parallel operation inside the device. This requires a
serializer and deserializer (SerDes) inside the I/O structure. Each input has access to its own deserializer (serial-to-parallel
converter) with programmable parallel width of 2, 3, or 4 bits. Where differential inputs are used, the two serializers can be
cascaded to provide parallel widths of 5, 6, 7, or 8 bits. Each output has access to its own serializer (parallel-to-serial
converter) with programmable parallel width of 2, 3, or 4 bits. Two serializers can be cascaded when a differential driver is
used to give access to bus widths of 5, 6, 7, or 8 bits.
When distributing a double data rate clock, all SerDes data is actually clocked in/out at single data rate to eliminate the
possibility of bit errors due to duty cycle distortion. This faster single data rate clock is either derived via frequency
multiplication in a PLL, or doubled locally in each IOB by differentiating both clock edges when the incoming clock uses
double data rate.
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Low-Power Gigabit Transceiver
Ultra-fast data transmission between ICs, over the backplane, or over longer distances is becoming increasingly popular and
important. It requires specialized dedicated on-chip circuitry and differential I/O capable of coping with the signal integrity
issues at these high data rates.
All Spartan-6 LXT devices have 2–8 gigabit transceiver circuits. Each GTP transceiver is a combined transmitter and
receiver capable of operating at a data rate between 622 Mb/s and 3.125 Gb/s. The transmitter and receiver are
independent circuits that use separate PLLs to multiply the reference frequency input by certain programmable numbers
between 2 and 25, to become the bit-serial data clock. Each GTP transceiver has a large number of user-definable features
and parameters. All of these can be defined during device configuration, and many can also be modified during operation.
Transmitter
The transmitter is fundamentally a parallel-to-serial converter with a conversion ratio of 8, 10, 16, or 20. The transmitter
output drives the PC board with a single-channel differential current-mode logic (CML) output signal.
TXOUTCLK is the appropriately divided serial data clock and can be used directly to register the parallel data coming from
the internal logic. The incoming parallel data is fed through a small FIFO and can optionally be modified with the 8B/10B
algorithm to guarantee a sufficient number of transitions. The bit-serial output signal drives two package pins with
complementary CML signals. This output signal pair has programmable signal swing as well as programmable pre-
emphasis to compensate for PC board losses and other interconnect characteristics.
Receiver
The receiver is fundamentally a serial-to-parallel converter, changing the incoming bit serial differential signal into a parallel
stream of words, each 8, 10, 16, or 20 bits wide. The receiver takes the incoming differential data stream, feeds it through a
programmable equalizer (to compensate for the PC board and other interconnect characteristics), and uses the FREF input
to initiate clock recognition. There is no need for a separate clock line. The data pattern uses non-return-to-zero (NRZ)
encoding and optionally guarantees sufficient data transitions by using the 8B/10B encoding scheme. Parallel data is then
transferred into the FPGA logic using the RXUSRCLK clock. The serial-to-parallel conversion ratio can be 8, 10, 16, or 20.
Integrated Endpoint Blocks for PCI Express Designs
The PCI Express standard is a packet-based, point-to-point serial interface standard. The differential signal transmission
uses an embedded clock, which eliminates the clock-to-data skew problems of traditional wide parallel buses.
The PCI Express Base Specification 1.1 defines bit rate of 2.5 Gb/s per lane, per direction (transmit and receive). When
using 8B/10B encoding, this supports a data rate of 2.0 Gb/s per lane.
The Spartan-6 LXT devices include one integrated Endpoint block for PCI Express technology that is compliant with the PCI
Express Base Specification Revision 1.1. This block is highly configurable to system design requirements and operates as
a compliant single lane Endpoint. The integrated Endpoint block interfaces to the GTP transceivers for serialization/de-
serialization, and to block RAMs for data buffering. Combined, these elements implement the physical layer, data link layer,
and transaction layer of the protocol.
Xilinx provides a light-weight (<100 LUT), configurable, ease-of-use LogiCORE™ wrapper that ties the various building
blocks (the integrated Endpoint block for PCI Express technology, the GTP transceivers, block RAM, and clocking resources)
into a compliant Endpoint solution. The system designer has control over many configurable parameters: maximum payload
size, reference clock frequency, and base address register decoding and filtering.
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Spartan-6 FPGA Ordering Information
The Spartan-6 FPGA ordering information shown in Figure 1 applies to all packages including Pb-Free.
Revision History
The following table shows the revision history for this document:
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WARRANTY DOES NOT EXTEND TO ANY USE OF PRODUCTS IN AN APPLICATION OR ENVIRONMENT THAT IS NOT WITHIN THE
SPECIFICATIONS STATED IN THE XILINX DATA SHEET. ALL SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE.
PRODUCTS ARE NOT DESIGNED OR INTENDED TO BE FAIL-SAFE OR FOR USE IN ANY APPLICATION REQUIRING FAIL-SAFE
PERFORMANCE, SUCH AS LIFE-SUPPORT OR SAFETY DEVICES OR SYSTEMS, OR ANY OTHER APPLICATION THAT INVOKES
THE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL
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APPLICABLE LAWS AND REGULATIONS.
X-Ref Target - Figure 1
Figure 1: Spartan-6 FPGA Ordering Information
Date Version Description of Revisions
02/02/09 1.0 Initial Xilinx release.
05/05/09 1.1 Updated and simplified Designed for low cost, Multi-voltage, multi-standard SelectIO banks, and
Integrated Memory Controller blocks sections on page 1. Clarified PCI support on page 1is only for the
33 MHz specification. Revised number of logic cells, slices, and maximum user I/O, and added number
of flip-flops to Ta ble 1 . In Ta b l e 2 , revised user I/O counts, removed the XC6SLX25 in the CSG225
package and the XC6SLX45T in the FGG676 package, added XC6SLX9 in the FT(G)256 package and
XC6SLX45 in the CSG324 package, and added notes. Clerical edits to the following sections: Dynamic
Reconfiguration Port, Readback, CLBs, Slices, and LUTs, Frequency Synthesis, PLLs, Programmable
Data Width, and Memory Controller Block. Clarified I/O pin range, VREF banks, and electrical
characteristics in the Input/Output section.
06/24/09 1.2 Updated device/package combinations in Ta bl e 1 and Ta b l e 2 including adding the XC6SLX75 and
XC6SLX75T devices. Added ordering information and FPGA documentation sections. Removed
partial reconfiguration discussion from the Readback section.
Example: XC6SLX100T-2FGG676C
Device Type
Temperature Range:
C = Commercial (TJ = 0°C to +85°C)
I = Industrial (TJ = –40°C to +100°C)
Number of Pins
Package Type
Speed Grade
(-L1(1), -2, -3(2))
Pb-Free
DS160_01_061909
Note:
1) -L1 is the ordering code for the lower power version.
Not all devices are offered in this version. See the
Spartan-6 FPGA data sheet for more information.
2) -3 speed grades are not available in all devices.
Spartan-6 Family Overview
DS160 (v1.2) June 24, 2009 www.xilinx.com
Advance Product Specification 10
Spartan-6 FPGA Documentation
Complete and up-to-date documentation of the Spartan-6 family of FPGAs is available on the Xilinx website at
http://www.xilinx.com/support/documentation/spartan-6.htm. In addition to the most recent Spartan-6 Family Overview, the
following files are also available for download:
Spartan-6 FPGA Data Sheet: DC and Switching
Characteristics (DS162)
This data sheet contains the DC and Switching
Characteristic specifications for the Spartan-6 family.
Spartan-6 FPGA Packaging and Pinout Specifications
(UG385)
These specifications includes the tables for device/package
combinations and maximum I/Os, pin definitions, pinout
tables, pinout diagrams, mechanical drawings, and thermal
specifications.
Spartan-6 FPGA Configuration Guide (UG380)
This all-encompassing configuration guide includes
chapters on configuration interfaces (serial and parallel),
multi-bitstream management, bitstream encryption,
boundary-scan and JTAG configuration, and reconfiguration
techniques.
Spartan-6 FPGA SelectIO Resources User Guide
(UG381)
This guide describes the SelectIO™ resources available in
all the Spartan-6 devices.
Spartan-6 FPGA Clocking Resources User Guide
(UG382)
This guide describes the clocking resources available in all
Spartan-6 devices, including the DCMs and the PLLs.
Spartan-6 FPGA Block RAM Resources User Guide
(UG383)
This guide describes the Spartan-6 device block RAM
capabilities.
Spartan-6 FPGA Configurable Logic Blocks User Guide
(UG384)
This guide describes the capabilities of the configurable
logic blocks (CLB) available in all Spartan-6 devices.
Spartan-6 FPGA GTP Transceivers User Guide (UG386)
This guide describes the GTP transceivers available in all
the Spartan-6 LXT FPGAs.
Spartan-6 FPGA DSP48A1 Slice User Guide (UG389)
This guide describes the architecture of the DSP48A1 slice
in Spartan-6 FPGAs and provides configuration examples.
Spartan-6 FPGA Memory Controller User Guide
(UG388)
This guide describes the Spartan-6 FPGA memory
controller block, a dedicated, embedded multi-port memory
controller that greatly simplifies interfacing Spartan-6
FPGAs to the most popular memory standards.
Spartan-6 FPGA PCB Design Guide (UG393)
This guide provides information on PCB design for
Spartan-6 devices, with a focus on strategies for making
design decisions at the PCB and interface level.