XILINX XC3042A

0
XC3000 Series
Field Programmable Gate Arrays
(XC3000A/L, XC3100A/L)
R
November 9, 1998 (Version 3.1)
0
7*
Features
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Complete line of four related Field Programmable Gate
Array product families
- XC3000A, XC3000L, XC3100A, XC3100L
Ideal for a wide range of custom VLSI design tasks
- Replaces TTL, MSI, and other PLD logic
- Integrates complete sub-systems into a single
package
- Avoids the NRE, time delay, and risk of conventional
masked gate arrays
High-performance CMOS static memory technology
- Guaranteed toggle rates of 70 to 370 MHz, logic
delays from 7 to 1.5 ns
- System clock speeds over 85 MHz
- Low quiescent and active power consumption
Flexible FPGA architecture
- Compatible arrays ranging from 1,000 to 7,500 gate
complexity
- Extensive register, combinatorial, and I/O
capabilities
- High fan-out signal distribution, low-skew clock nets
- Internal 3-state bus capabilities
- TTL or CMOS input thresholds
- On-chip crystal oscillator amplifier
Unlimited reprogrammability
- Easy design iteration
- In-system logic changes
Extensive packaging options
- Over 20 different packages
- Plastic and ceramic surface-mount and pin-gridarray packages
- Thin and Very Thin Quad Flat Pack (TQFP and
VQFP) options
Ready for volume production
- Standard, off-the-shelf product availability
- 100% factory pre-tested devices
- Excellent reliability record
Device
XC3020A, 3020L, 3120A
XC3030A, 3030L, 3130A
XC3042A, 3042L, 3142A, 3142L
Product Description
Max Logic
Gates
1,500
2,000
3,000
Additional XC3100A Features
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Ultra-high-speed FPGA family with six members
- 50-85 MHz system clock rates
- 190 to 370 MHz guaranteed flip-flop toggle rates
- 1.55 to 4.1 ns logic delays
High-end additional family member in the 22 X 22 CLB
array-size XC3195A device
8 mA output sink current and 8 mA source current
Maximum power-down and quiescent current is 5 mA
100% architecture and pin-out compatible with other
XC3000 families
Software and bitstream compatible with the XC3000,
XC3000A, and XC3000L families
XC3100A combines the features of the XC3000A and
XC3100 families:
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Additional interconnect resources for TBUFs and CE
inputs
Error checking of the configuration bitstream
Soft startup holds all outputs slew-rate limited during
initial power-up
More advanced CMOS process
Low-Voltage Versions Available
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Typical Gate
CLBs
Range
1,000 - 1,500
64
1,500 - 2,000
2,000 - 3,000
Complete Development System
- Schematic capture, automatic place and route
- Logic and timing simulation
- Interactive design editor for design optimization
- Timing calculator
- Interfaces to popular design environments like
Viewlogic, Cadence, Mentor Graphics, and others
100
144
Low-voltage devices function at 3.0 - 3.6 V
XC3000L - Low-voltage versions of XC3000A devices
XC3100L - Low-voltage versions of XC3100A devices
Array
8x8
10 x 10
12 x 12
User I/Os
Flip-Flops
Max
64
256
80
96
360
480
Horizontal
Longlines
16
Configuration
Data Bits
14,779
20
24
22,176
30,784
XC3064A, 3064L, 3164A
4,500
3,500 - 4,500
224
16 x 14
120
688
32
46,064
XC3090A, 3090L, 3190A, 3190L
XC3195A
6,000
7,500
5,000 - 6,000
6,500 - 7,500
320
484
16 x 20
22 x 22
144
176
928
1,320
40
44
64,160
94,984
November 9, 1998 (Version 3.1)
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XC3000 Series Field Programmable Gate Arrays
Introduction
XC3000-Series Field Programmable Gate Arrays (FPGAs)
provide a group of high-performance, high-density, digital
integrated circuits. Their regular, extendable, flexible,
user-programmable array architecture is composed of a
configuration program store plus three types of configurable elements: a perimeter of I/O Blocks (IOBs), a core
array of Configurable Logic Bocks (CLBs) and resources
for interconnection. The general structure of an FPGA is
shown in Figure 2. The development system provides
schematic capture and auto place-and-route for design
entry. Logic and timing simulation, and in-circuit emulation
are available as design verification alternatives. The design
editor is used for interactive design optimization, and to
compile the data pattern that represents the configuration
program.
The FPGA user logic functions and interconnections are
determined by the configuration program data stored in
internal static memory cells. The program can be loaded in
any of several modes to accommodate various system
requirements. The program data resides externally in an
EEPROM, EPROM or ROM on the application circuit
board, or on a floppy disk or hard disk. On-chip initialization
logic provides for optional automatic loading of program
data at power-up. The companion XC17XX Serial Configuration PROMs provide a very simple serial configuration
program storage in a one-time programmable package.
The XC3000 Field Programmable Gate Array families provide a variety of logic capacities, package styles, temperature ranges and speed grades.
XC3000 Series Overview
There are now four distinct family groupings within the
XC3000 Series of FPGA devices:
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XC3000A Family
XC3000L Family
XC3100A Family
XC3100L Family
All four families share a common architecture, development software, design and programming methodology, and
also common package pin-outs. An extensive Product
Description covers these common aspects.
Detailed parametric information for the XC3000A,
XC3000L, XC3100A, and XC3100L product families is then
provided. (The XC3000 and XC3100 families are not recommended for new designs.)
7-4
Here is a simple overview of those XC3000 products currently emphasized:
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XC3000A Family — The XC3000A is an enhanced
version of the basic XC3000 family, featuring additional
interconnect resources and other user-friendly
enhancements.
XC3000L Family — The XC3000L is identical in
architecture and features to the XC3000A family, but
operates at a nominal supply voltage of 3.3 V. The
XC3000L is the right solution for battery-operated and
low-power applications.
XC3100A Family — The XC3100A is a
performance-optimized relative of the XC3000A family.
While both families are bitstream and footprint
compatible, the XC3100A family extends toggle rates to
370 MHz and in-system performance to over 80 MHz.
The XC3100A family also offers one additional array
size, the XC3195A.
XC3100L Family — The XC3100L is identical in
architectures and features to the XC3100A family, but
operates at a nominal supply voltage of 3.3V.
Figure 1 illustrates the relationships between the families.
Compared to the original XC3000 family, XC3000A offers
additional functionality and increased speed. The XC3000L
family offers the same additional functionality, but reduced
speed due to its lower supply voltage of 3.3 V. The
XC3100A family offers substantially higher speed and
higher density with the XC3195A.
New XC3000 Series Compared to Original
XC3000 Family
For readers already familiar with the original XC3000 family
of FPGAs, the major new features in the XC3000A,
XC3000L, XC3100A, and XC3100L families are listed in
this section.
All of these new families are upward-compatible extensions
of the original XC3000 FPGA architecture. Any bitstream
used to configure an XC3000 device will configure the corresponding XC3000A, XC3000L, XC3100A, or XC3100L
device exactly the same way.
The XC3100A and XC3100L FPGA architectures are
upward-compatible extensions of the XC3000A and
XC3000L architectures. Any bitstream used to configure an
XC3000A or XC3000L device will configure the corresponding XC3100A or XC3100L device exactly the same
way.
November 9, 1998 (Version 3.1)
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XC3000 Series Field Programmable Gate Arrays
Improvements in the XC3000A and XC3000L
Families
nality
Functio
The XC3000A and XC3000L families offer the following
enhancements over the popular XC3000 family:
The XC3000A and XC3000L families have additional interconnect resources to drive the I-inputs of TBUFs driving
horizontal Longlines. The CLB Clock Enable input can be
driven from a second vertical Longline. These two additions
result in more efficient and faster designs when horizontal
Longlines are used for data bussing.
0A
XC310
00L
0
XC310XC31
0A
XC300
0L
XC300
Speed
During configuration, the XC3000A and XC3000L devices
check the bit-stream format for stop bits in the appropriate
positions. Any error terminates the configuration and pulls
INIT Low.
When the configuration process is finished and the device
starts up in user mode, the first activation of the outputs is
automatically slew-rate limited. This feature, called Soft
Startup, avoids the potential ground bounce when all
out-puts are turned on simultaneously. After start-up, the
slew rate of the individual outputs is, as in the XC3000 family, determined by the individual configuration option.
)
195A
(XC3
city
Capa
Gate
X7068
Figure 1: XC3000 FPGA Families
Improvements in the XC3100A and XC3100L
Families
7
Based on a more advanced CMOS process, the XC3100A
and XC3100L families are architecturally-identical, performance-optimized relatives of the XC3000A and XC3000L
families. While all families are footprint compatible, the
XC3100A family extends achievable system performance
beyond 85 MHz.
November 9, 1998 (Version 3.1)
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XC3000 Series Field Programmable Gate Arrays
Detailed Functional Description
data may be either bit serial or byte parallel. The development system generates the configuration program bitstream used to configure the device. The memory loading
process is independent of the user logic functions.
The perimeter of configurable Input/Output Blocks (IOBs)
provides a programmable interface between the internal
logic array and the device package pins. The array of Configurable Logic Blocks (CLBs) performs user-specified logic
functions. The interconnect resources are programmed to
form networks, carrying logic signals among blocks, analogous to printed circuit board traces connecting MSI/SSI
packages.
Configuration Memory
The static memory cell used for the configuration memory
in the Field Programmable Gate Array has been designed
specifically for high reliability and noise immunity. Integrity
of the device configuration memory based on this design is
assured even under adverse conditions. As shown in
Figure 3, the basic memory cell consists of two CMOS
inverters plus a pass transistor used for writing and reading
cell data. The cell is only written during configuration and
only read during readback. During normal operation, the
cell provides continuous control and the pass transistor is
off and does not affect cell stability. This is quite different
from the operation of conventional memory devices, in
which the cells are frequently read and rewritten.
The block logic functions are implemented by programmed
look-up tables. Functional options are implemented by program-controlled multiplexers. Interconnecting networks
between blocks are implemented with metal segments
joined by program-controlled pass transistors.
These FPGA functions are established by a configuration
program which is loaded into an internal, distributed array
of configuration memory cells. The configuration program
is loaded into the device at power-up and may be reloaded
on command. The FPGA includes logic and control signals
to implement automatic or passive configuration. Program
PWR
P9
P8
P7
P6
P5
P4
P3
P2
GND
DN
I/O Blocks
P11
3-State Buffers With Access
to Horizontal Long Lines
Configurable Logic
Blocks
TCL
KIN
AA
AB
AC
AD
P12
Interconnect Area
BA
U61
BB
Frame Pointer
P13
Configuration Memory
X3241
Figure 2: Field Programmable Gate Array Structure.
It consists of a perimeter of programmable I/O blocks, a core of configurable logic blocks and their interconnect resources.
These are all controlled by the distributed array of configuration program memory cells.
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November 9, 1998 (Version 3.1)
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XC3000 Series Field Programmable Gate Arrays
Q
Q
Read or
Write
testing, no soft errors have been observed even in the
presence of very high doses of alpha radiation.
Configuration
Control
Data
X5382
Figure 3: Static Configuration Memory Cell.
It is loaded with one bit of configuration program and controls one program selection in the Field Programmable
Gate Array.
The memory cell outputs Q and Q use ground and VCC levels and provide continuous, direct control. The additional
capacitive load together with the absence of address
decoding and sense amplifiers provide high stability to the
cell. Due to the structure of the configuration memory cells,
they are not affected by extreme power-supply excursions
or very high levels of alpha particle radiation. In reliability
The method of loading the configuration data is selectable.
Two methods use serial data, while three use byte-wide
data. The internal configuration logic utilizes framing information, embedded in the program data by the development
system, to direct memory-cell loading. The serial-data
framing and length-count preamble provide programming
compatibility for mixes of various FPGA device devices in a
synchronous, serial, daisy-chain fashion.
I/O Block
Each user-configurable IOB shown in Figure 4, provides an
interface between the external package pin of the device
and the internal user logic. Each IOB includes both registered and direct input paths. Each IOB provides a programmable 3-state output buffer, which may be driven by a
registered or direct output signal. Configuration options
allow each IOB an inversion, a controlled slew rate and a
high impedance pull-up. Each input circuit also provides
input clamping diodes to provide electrostatic protection,
and circuits to inhibit latch-up produced by input currents.
Vcc
PROGRAM-CONTROLLED MEMORY CELLS
OUT
INVERT
3- STATE
(OUTPUT ENABLE)
OUT
OUTPUT
SELECT
3-STATE
INVERT
SLEW
RATE
7
PASSIVE
PULL UP
T
O
D
Q
FLIP
FLOP
OUTPUT
BUFFER
I/O PAD
R
DIRECT IN
REGISTERED IN
I
Q
Q
D
FLIP
FLOP
or
LATCH
TTL or
CMOS
INPUT
THRESHOLD
R
OK
IK
(GLOBAL RESET)
CK1
CK2
PROGRAM
CONTROLLED
MULTIPLEXER
= PROGRAMMABLE INTERCONNECTION POINT or PIP
X3029
Figure 4: Input/Output Block.
Each IOB includes input and output storage elements and I/O options selected by configuration memory cells. A choice
of two clocks is available on each die edge. The polarity of each clock line (not each flip-flop or latch) is programmable.
A clock line that triggers the flip-flop on the rising edge is an active Low Latch Enable (Latch transparent) signal and vice
versa. Passive pull-up can only be enabled on inputs, not on outputs. All user inputs are programmed for TTL or CMOS
thresholds.
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XC3000 Series Field Programmable Gate Arrays
The input-buffer portion of each IOB provides threshold
detection to translate external signals applied to the package pin to internal logic levels. The global input-buffer
threshold of the IOBs can be programmed to be compatible
with either TTL or CMOS levels. The buffered input signal
drives the data input of a storage element, which may be
configured as either a flip-flop or a latch. The clocking
polarity (rising/falling edge-triggered flip-flop, High/Low
transparent latch) is programmable for each of the two
clock lines on each of the four die edges. Note that a clock
line driving a rising edge-triggered flip-flop makes any latch
driven by the same line on the same edge Low-level transparent and vice versa (falling edge, High transparent). All
Xilinx primitives in the supported schematic-entry packages, however, are positive edge-triggered flip-flops or
High transparent latches. When one clock line must drive
flip-flops as well as latches, it is necessary to compensate
for the difference in clocking polarities with an additional
inverter either in the flip-flop clock input or the latch-enable
input. I/O storage elements are reset during configuration
or by the active-Low chip RESET input. Both direct input
(from IOB pin I) and registered input (from IOB pin Q) signals are available for interconnect.
For reliable operation, inputs should have transition times
of less than 100 ns and should not be left floating. Floating
CMOS input-pin circuits might be at threshold and produce
oscillations. This can produce additional power dissipation
and system noise. A typical hysteresis of about 300 mV
reduces sensitivity to input noise. Each user IOB includes a
programmable high-impedance pull-up resistor, which may
be selected by the program to provide a constant High for
otherwise undriven package pins. Although the Field Programmable Gate Array provides circuitry to provide input
protection for electrostatic discharge, normal CMOS handling precautions should be observed.
Flip-flop loop delays for the IOB and logic-block flip-flops
are short, providing good performance under asynchronous clock and data conditions. Short loop delays minimize
the probability of a metastable condition that can result
from assertion of the clock during data transitions. Because
of the short-loop-delay characteristic in the Field Programmable Gate Array, the IOB flip-flops can be used to synchronize external signals applied to the device. Once
synchronized in the IOB, the signals can be used internally
without further consideration of their clock relative timing,
except as it applies to the internal logic and routing-path
delays.
IOB output buffers provide CMOS-compatible 4-mA
source-or-sink drive for high fan-out CMOS or TTL- compatible signal levels (8 mA in the XC3100A family). The network driving IOB pin O becomes the registered or direct
data source for the output buffer. The 3-state control signal
(IOB) pin T can control output activity. An open-drain output
may be obtained by using the same signal for driving the
7-8
output and 3-state signal nets so that the buffer output is
enabled only for a Low.
Configuration program bits for each IOB control features
such as optional output register, logic signal inversion, and
3-state and slew-rate control of the output.
The program-controlled memory cells of Figure 4 control
the following options.
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•
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•
Logic inversion of the output is controlled by one
configuration program bit per IOB.
Logic 3-state control of each IOB output buffer is
determined by the states of configuration program bits
that turn the buffer on, or off, or select the output buffer
3-state control interconnection (IOB pin T). When this
IOB output control signal is High, a logic one, the buffer
is disabled and the package pin is high impedance.
When this IOB output control signal is Low, a logic zero,
the buffer is enabled and the package pin is active.
Inversion of the buffer 3-state control-logic sense
(output enable) is controlled by an additional
configuration program bit.
Direct or registered output is selectable for each IOB.
The register uses a positive-edge, clocked flip-flop. The
clock source may be supplied (IOB pin OK) by either of
two metal lines available along each die edge. Each of
these lines is driven by an invertible buffer.
Increased output transition speed can be selected to
improve critical timing. Slower transitions reduce
capacitive-load peak currents of non-critical outputs
and minimize system noise.
An internal high-impedance pull-up resistor (active by
default) prevents unconnected inputs from floating.
Unlike the original XC3000 series, the XC3000A,
XC3000L, XC3100A, and XC3100L families include the
Soft Startup feature. When the configuration process is finished and the device starts up in user mode, the first activation of the outputs is automatically slew-rate limited. This
feature avoids potential ground bounce when all outputs
are turned on simultaneously. After start-up, the slew rate
of the individual outputs is determined by the individual
configuration option.
Summary of I/O Options
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Inputs
- Direct
- Flip-flop/latch
- CMOS/TTL threshold (chip inputs)
- Pull-up resistor/open circuit
Outputs
- Direct/registered
- Inverted/not
- 3-state/on/off
- Full speed/slew limited
- 3-state/output enable (inverse)
November 9, 1998 (Version 3.1)
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XC3000 Series Field Programmable Gate Arrays
Configurable Logic Block
resources adjacent to the blocks. Each CLB also has two
outputs (X and Y) which may drive interconnect networks.
The array of CLBs provides the functional elements from
which the user’s logic is constructed. The logic blocks are
arranged in a matrix within the perimeter of IOBs. For
example, the XC3020A has 64 such blocks arranged in 8
rows and 8 columns. The development system is used to
compile the configuration data which is to be loaded into
the internal configuration memory to define the operation
and interconnection of each block. User definition of CLBs
and their interconnecting networks may be done by automatic translation from a schematic-capture logic diagram or
optionally by installing library or user macros.
Data input for either flip-flop within a CLB is supplied from
the function F or G outputs of the combinatorial logic, or the
block input, DI. Both flip-flops in each CLB share the asynchronous RD which, when enabled and High, is dominant
over clocked inputs. All flip-flops are reset by the
active-Low chip input, RESET, or during the configuration
process. The flip-flops share the enable clock (EC) which,
when Low, recirculates the flip-flops’ present states and
inhibits response to the data-in or combinatorial function
inputs on a CLB. The user may enable these control inputs
and select their sources. The user may also select the
clock net input (K), as well as its active sense within each
CLB. This programmable inversion eliminates the need to
route both phases of a clock signal throughout the device.
Each CLB has a combinatorial logic section, two flip-flops,
and an internal control section. See Figure 5. There are:
five logic inputs (A, B, C, D and E); a common clock input
(K); an asynchronous direct RESET input (RD); and an
enable clock (EC). All may be driven from the interconnect
DI
DATA IN
0
MUX
F
D
Q
1
DIN
G
QX
RD
QX
X
A
7
F
F
B
LOGIC
VARIABLES
C
D
COMBINATORIAL
FUNCTION
E
CLB OUTPUTS
G
G
QY
Y
QY
F
DIN
G
0
MUX
D
Q
1
EC
ENABLE CLOCK
RD
1 (ENABLE)
K
CLOCK
DIRECT
RESET
RD
0 (INHIBIT)
(GLOBAL RESET)
X3032
Figure 5: Configurable Logic Block.
Each CLB includes a combinatorial logic section, two flip-flops and a program memory controlled multiplexer selection of
function. It has the following:
- five logic variable inputs A, B, C, D, and E
- a direct data in DI
- an enable clock EC
- a clock (invertible) K
- an asynchronous direct RESET RD
- two outputs X and Y
November 9, 1998 (Version 3.1)
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XC3000 Series Field Programmable Gate Arrays
Flexible routing allows use of common or individual CLB
clocking.
The combinatorial-logic portion of the CLB uses a 32 by 1
look-up table to implement Boolean functions. Variables
selected from the five logic inputs and two internal block
flip-flops are used as table address inputs. The combinatorial propagation delay through the network is independent
of the logic function generated and is spike free for single
input variable changes. This technique can generate two
independent logic functions of up to four variables each as
shown in Figure 6a, or a single function of five variables as
shown in Figure 6b, or some functions of seven variables
as shown in Figure 6c. Figure 7 shows a modulo-8 binary
counter with parallel enable. It uses one CLB of each type.
The partial functions of six or seven variables are implemented using the input variable (E) to dynamically select
between two functions of four different variables. For the
two functions of four variables each, the independent
results (F and G) may be used as data inputs to either
flip-flop or either logic block output. For the single function
of five variables and merged functions of six or seven variables, the F and G outputs are identical. Symmetry of the F
and G functions and the flip-flops allows the interchange of
CLB outputs to optimize routing efficiencies of the networks
interconnecting the CLBs and IOBs.
A
B
QX
QY
Any Function
of Up to 4
Variables
F
QY
Any Function
of Up to 4
Variables
G
C
D
E
A
B
QX
C
D
E
5a
A
B
QX
F
QY
Any Function
of 5 Variables
G
C
D
E
5b
A
B
QX
Programmable Interconnect
Programmable-interconnection resources in the Field Programmable Gate Array provide routing paths to connect
inputs and outputs of the IOBs and CLBs into logic networks. Interconnections between blocks are composed of a
two-layer grid of metal segments. Specially designed pass
transistors, each controlled by a configuration bit, form programmable interconnect points (PIPs) and switching matrices used to implement the necessary connections between
selected metal segments and block pins. Figure 8 is an
example of a routed net. The development system provides
automatic routing of these interconnections. Interactive
routing is also available for design optimization. The inputs
of the CLBs or IOBs are multiplexers which can be programmed to select an input network from the adjacent
interconnect segments. Since the switch connections to
block inputs are unidirectional, as are block outputs,
they are usable only for block input connection and not
for routing. Figure 9 illustrates routing access to logic
block input variables, control inputs and block outputs.
Three types of metal resources are provided to accommodate various network interconnect requirements.
•
•
•
General Purpose Interconnect
Direct Connection
Longlines (multiplexed busses and wide AND gates)
7-10
QY
C
Any Function
of Up to 4
Variables
D
F
M
U
X
A
B
G
QX
QY
Any Function
of Up to 4
Variables
C
D
E
5c
FGM
Mode
X5442
Figure 6: Combinational Logic Options
6a. Combinatorial Logic Option FG generates two functions of four variables each. One variable, A, must be
common to both functions. The second and third variable
can be any choice of B, C, QX and QY. The fourth variable can be any choice of D or E.
6b. Combinatorial Logic Option F generates any function
of five variables: A, D, E and two choices out of B, C, QX,
QY.
6c. Combinatorial Logic Option FGM allows variable E to
select between two functions of four variables: Both have
common inputs A and D and any choice out of B, C, QX
and QY for the remaining two variables. Option 3 can
then implement some functions of six or seven variables.
November 9, 1998 (Version 3.1)
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XC3000 Series Field Programmable Gate Arrays
Count Enable
Parallel Enable
Clock
Terminal
Count
Dual Function of 4 Variables
D
Q
Q0
D0
FG
Mode
D
Q
Q1
D1
Function of 5 Variables
F
Mode
D
Q
Q2
D2
Function of 6 Variables
FGM
Mode
Figure 8: A Design Editor view of routing resources
used to form a typical interconnection network from
CLB GA.
X5383
Figure 7: Counter.
The modulo-8 binary counter with parallel enable and
clock enable uses one combinatorial logic block of each
option.
General Purpose Interconnect
General purpose interconnect, as shown in Figure 10, consists of a grid of five horizontal and five vertical metal segments located between the rows and columns of logic and
IOBs. Each segment is the height or width of a logic block.
Switching matrices join the ends of these segments and
allow programmed interconnections between the metal grid
segments of adjoining rows and columns. The switches of
an unprogrammed device are all non-conducting. The connections through the switch matrix may be established by
the automatic routing or by selecting the desired pairs of
matrix pins to be connected or disconnected. The legitimate switching matrix combinations for each pin are indicated in Figure 11.
Special buffers within the general interconnect areas provide periodic signal isolation and restoration for improved
performance of lengthy nets. The interconnect buffers are
available to propagate signals in either direction on a given
general interconnect segment. These bidirectional (bidi)
buffers are found adjacent to the switching matrices, above
November 9, 1998 (Version 3.1)
and to the right. The other PIPs adjacent to the matrices
are accessed to or from Longlines. The development system automatically defines the buffer direction based on the
location of the interconnection network source. The delay
calculator of the development system automatically calculates and displays the block, interconnect and buffer delays
for any paths selected. Generation of the simulation netlist
with a worst-case delay model is provided.
Direct Interconnect
Direct interconnect, shown in Figure 12, provides the most
efficient implementation of networks between adjacent
CLBs or I/O Blocks. Signals routed from block to block
using the direct interconnect exhibit minimum interconnect
propagation and use no general interconnect resources.
For each CLB, the X output may be connected directly to
the B input of the CLB immediately to its right and to the C
input of the CLB to its left. The Y output can use direct interconnect to drive the D input of the block immediately above
and the A input of the block below. Direct interconnect
should be used to maximize the speed of high-performance
portions of logic. Where logic blocks are adjacent to IOBs,
direct connect is provided alternately to the IOB inputs (I)
and outputs (O) on all four edges of the die. The right edge
provides additional direct connects from CLB outputs to
adjacent IOBs. Direct interconnections of IOBs with CLBs
are shown in Figure 13.
7-11
7
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XC3000 Series Field Programmable Gate Arrays
Figure 9: Design Editor Locations of interconnect access, CLB control inputs, logic inputs and outputs. The dot pattern
represents the available programmable interconnection points (PIPs).
Some of the interconnect PIPs are directional.
7-12
November 9, 1998 (Version 3.1)
R
XC3000 Series Field Programmable Gate Arrays
Figure 10: FPGA General-Purpose Interconnect.
Composed of a grid of metal segments that may be interconnected through switch matrices to form networks for
CLB and IOB inputs and outputs.
Figure 12: CLB X and Y Outputs.
The X and Y outputs of each CLB have single contact,
direct access to inputs of adjacent CLBs
7
Figure 11: Switch Matrix Interconnection Options for
Each Pin.
Switch matrices on the edges are different.
November 9, 1998 (Version 3.1)
7-13
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XC3000 Series Field Programmable Gate Arrays
Global Buffer Direct Input
* Unbonded IOBs (6 Places)
Figure 13:
7-14
Global Buffer Inerconnect
Alternate Buffer Direct Input
XC3020A Die-Edge IOBs. The XC3020A die-edge IOBs are provided with direct access to adjacent CLBs.
November 9, 1998 (Version 3.1)
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XC3000 Series Field Programmable Gate Arrays
Longlines
The Longlines bypass the switch matrices and are intended
primarily for signals that must travel a long distance, or
must have minimum skew among multiple destinations.
Longlines, shown in Figure 14, run vertically and horizontally the height or width of the interconnect area. Each interconnection column has three vertical Longlines, and each
interconnection row has two horizontal Longlines. Two
additional Longlines are located adjacent to the outer sets
of switching matrices. In devices larger than the XC3020A
and XC3120A FPGAs, two vertical Longlines in each col-
umn are connectable half-length lines. On the XC3020A
and XC3120A FPGAs, only the outer Longlines are connectable half-length lines.
Longlines can be driven by a logic block or IOB output on a
column-by-column basis. This capability provides a common low skew control or clock line within each column of
logic blocks. Interconnections of these Longlines are
shown in Figure 15. Isolation buffers are provided at each
input to a Longline and are enabled automatically by the
development system when a connection is made.
7
Figure 14: Horizontal and Vertical Longlines. These Longlines provide high fan-out, low-skew signal distribution in
each row and column. The global buffer in the upper left die corner drives a common line throughout the FPGA.
November 9, 1998 (Version 3.1)
7-15
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XC3000 Series Field Programmable Gate Arrays
Figure 15: Programmable Interconnection of Longlines. This is provided at the edges of the routing area.
Three-state buffers allow the use of horizontal Longlines to form on-chip wired AND and multiplexed buses. The left two
non-clock vertical Longlines per column (except XC3020A) and the outer perimeter Longlines may be programmed as
connectable half-length lines.
VCC
VCC
Z = DA • DB • DC • ... • DN
(LOW)
DA
DB
DC
DN
X3036
Figure 16: 3-State Buffers Implement a Wired-AND Function. When all the buffer 3-state lines are High, (high
impedance), the pull-up resistor(s) provide the High output. The buffer inputs are driven by the control signals or a Low.
Z = DA • A + DB • B + DC • C + … + DN • N
WEAK
KEEPER CIRCUIT
DA
DB
DC
DN
A
B
C
N
X1741A
Figure 17: 3-State Buffers Implement a Multiplexer. The selection is accomplished by the buffer 3-state signal.
7-16
November 9, 1998 (Version 3.1)
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XC3000 Series Field Programmable Gate Arrays
of the 3-state buffer controls allows them to implement wide
multiplexing functions. Any 3-state buffer input can be
selected as drive for the horizontal long-line bus by applying a Low logic level on its 3-state control line. See
Figure 16. The user is required to avoid contention which
can result from multiple drivers with opposing logic levels.
Control of the 3-state input by the same signal that drives
the buffer input, creates an open-drain wired-AND function.
A logic High on both buffer inputs creates a high impedance, which represents no contention. A logic Low enables
the buffer to drive the Longline Low. See Figure 17. Pull-up
resistors are available at each end of the Longline to provide a High output when all connected buffers are non-conducting. This forms fast, wide gating functions. When data
drives the inputs, and separate signals drive the 3-state
control lines, these buffers form multiplexers (3-state busses). In this case, care must be used to prevent contention
through multiple active buffers of conflicting levels on a
common line. Each horizontal Longline is also driven by a
weak keeper circuit that prevents undefined floating levels
by maintaining the previous logic level when the line is not
driven by an active buffer or a pull-up resistor. Figure 18
shows 3-state buffers, Longlines and pull-up resistors.
A buffer in the upper left corner of the FPGA chip drives a
global net which is available to all K inputs of logic blocks.
Using the global buffer for a clock signal provides a
skew-free, high fan-out, synchronized clock for use at any
or all of the IOBs and CLBs. Configuration bits for the K
input to each logic block can select this global line or
another routing resource as the clock source for its
flip-flops. This net may also be programmed to drive the die
edge clock lines for IOB use. An enhanced speed, CMOS
threshold, direct access to this buffer is available at the second pad from the top of the left die edge.
A buffer in the lower right corner of the array drives a horizontal Longline that can drive programmed connections to
a vertical Longline in each interconnection column. This
alternate buffer also has low skew and high fan-out. The
network formed by this alternate buffer’s Longlines can be
selected to drive the K inputs of the CLBs. CMOS threshold, high speed access to this buffer is available from the
third pad from the bottom of the right die edge.
Internal Busses
A pair of 3-state buffers, located adjacent to each CLB, permits logic to drive the horizontal Longlines. Logic operation
BIDIRECTIONAL
INTERCONNECT
BUFFERS
3 VERTICAL LONG
LINES PER COLUMN
GLOBAL NET
7
I/O CLOCKS
GH
GG
P48
HORIZONTAL LONG LINE
PULL-UP RESISTOR
HORIZONTAL LONG LINE
OSCILLATOR
AMPLIFIER OUTPUT
P47
BCL
KIN
HH
HG
DIRECTINPUT OF P47
TO AUXILIARY BUFFER
CRYSTAL OSCILLATOR
BUFFER
3-STATE INPUT
OS
C
3-STATE CONTROL
P46
.l .lk
.q
.ck
.Q
D
P
G
M
3-STATE BUFFER
ALTERNATE BUFFER
P40
P41
P42
P43
RST
X1245
Figure 18: Design Editor.
An extra large view of possible interconnections in the lower right corner of the XC3020A.
November 9, 1998 (Version 3.1)
7-17
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XC3000 Series Field Programmable Gate Arrays
Crystal Oscillator
Figure 18 also shows the location of an internal high speed
inverting amplifier that may be used to implement an
on-chip crystal oscillator. It is associated with the auxiliary
buffer in the lower right corner of the die. When the oscillator is configured and connected as a signal source, two
special user IOBs are also configured to connect the oscillator amplifier with external crystal oscillator components
as shown in Figure 19. A divide by two option is available to
assure symmetry. The oscillator circuit becomes active
early in the configuration process to allow the oscillator to
stabilize. Actual internal connection is delayed until completion of configuration. In Figure 19 the feedback resistor
R1, between the output and input, biases the amplifier at
threshold. The inversion of the amplifier, together with the
R-C networks and an AT-cut series resonant crystal, produce the 360-degree phase shift of the Pierce oscillator. A
D
series resistor R2 may be included to add to the amplifier
output impedance when needed for phase-shift control,
crystal resistance matching, or to limit the amplifier input
swing to control clipping at large amplitudes. Excess feedback voltage may be corrected by the ratio of C2/C1. The
amplifier is designed to be used from 1 MHz to about
one-half the specified CLB toggle frequency. Use at frequencies below 1 MHz may require individual characterization with respect to a series resistance. Crystal oscillators
above 20 MHz generally require a crystal which operates in
a third overtone mode, where the fundamental frequency
must be suppressed by an inductor across C2, turning this
parallel resonant circuit to double the fundamental crystal
frequency, i.e., 2/3 of the desired third harmonic frequency
network. When the oscillator inverter is not used, these
IOBs and their package pins are available for general user
I/O.
Q
Internal
Alternate
Clock Buffer
External
XTAL1
XTAL2
(IN)
R1
Suggested Component Values
R1 0.5 – 1 MΩ
R2 0 – 1 kΩ
(may be required for low frequency, phase
shift and/or compensation level for crystal Q)
C1, C2 10 – 40 pF
Y1 1 – 20 MHz AT-cut parallel resonant
XTAL 1 (OUT)
XTAL 2 (IN)
44 PIN
PLCC
30
26
68 PIN
PLCC
47
43
84 PIN
PGA
PLCC
J11
57
L11
53
100 PIN
CQFP PQFP
82
67
76
61
R2
Y1
C1
132 PIN
PGA
P13
M13
C2
160 PIN
PQFP
82
76
164 PIN
CQFP
105
99
175 PIN 176 PIN 208 PIN
TQFP
PQFP
PGA
91
110
T14
85
100
P15
X7064
Figure 19: Crystal Oscillator Inverter. When activated, and by selecting an output network for its buffer, the crystal
oscillator inverter uses two unconfigured package pins and external components to implement an oscillator. An optional
divide-by-two mode is available to assure symmetry.
7-18
November 9, 1998 (Version 3.1)
R
XC3000 Series Field Programmable Gate Arrays
Configuration
Initialization Phase
An internal power-on-reset circuit is triggered when power
is applied. When VCC reaches the voltage at which portions
of the FPGA device begin to operate (nominally 2.5 to 3 V),
the programmable I/O output buffers are 3-stated and a
high-impedance pull-up resistor is provided for the user
I/O pins. A time-out delay is initiated to allow the power
supply voltage to stabilize. During this time the power-down
mode is inhibited. The Initialization state time-out (about 11
to 33 ms) is determined by a 14-bit counter driven by a
self-generated internal timer. This nominal 1-MHz timer is
subject to variations with process, temperature and power
supply. As shown in Table 1, five configuration mode
choices are available as determined by the input levels of
three mode pins; M0, M1 and M2.
Table 1: Configuration Mode Choices
M0 M1 M2 CCLK
0
0
0 output
0
0
1 output
0
1
0 —
0
1
1 output
1
0
0 —
1
0
1 output
1
1
0 —
1
1
1 input
Mode
Master
Master
reserved
Master
reserved
Peripheral
reserved
Slave
Data
Bit Serial
Byte Wide Addr. = 0000 up
—
Byte Wide Addr. = FFFF down
—
Byte Wide
—
Bit Serial
In Master configuration modes, the device becomes the
source of the Configuration Clock (CCLK). The beginning
of configuration of devices using Peripheral or Slave
modes must be delayed long enough for their initialization
to be completed. An FPGA with mode lines selecting a
Master configuration mode extends its initialization state
using four times the delay (43 to 130 ms) to assure that all
daisy-chained slave devices, which it may be driving, will
be ready even if the master is very fast, and the slave(s)
very slow. Figure 20 shows the state sequences. At the end
of Initialization, the device enters the Clear state where it
clears the configuration memory. The active Low,
open-drain initialization signal INIT indicates when the Initialization and Clear states are complete. The FPGA tests
for the absence of an external active Low RESET before it
makes a final sample of the mode lines and enters the Configuration state. An external wired-AND of one or more INIT
pins can be used to control configuration by the assertion of
the active-Low RESET of a master mode device or to signal a processor that the FPGAs are not yet initialized.
If a configuration has begun, a re-assertion of RESET for a
minimum of three internal timer cycles will be recognized
and the FPGA will initiate an abort, returning to the Clear
state to clear the partially loaded configuration memory
words. The FPGA will then resample RESET and the mode
lines before re-entering the Configuration state.
During configuration, the XC3000A, XC3000L, XC3100A,
and XC3100L devices check the bit-stream format for stop
bits in the appropriate positions. Any error terminates the
configuration and pulls INIT Low.
All User I/O Pins 3-Stated with High Impedance Pull-Up, HDC=High, LDC=Low
INIT Output = Low
Power Down
No HDC, LDC
or Pull-Up
PWRDWN
Inactive
Initialization
Power-On
Time Delay
PWRDWN
Active
Active RESET
Clear
Configuration
Memory
RESET
Active
No
Test
Mode Pins
Configuration
Program Mode
Start-Up
Active RESET
Operates on
User Logic
Low on DONE/PROGRAM and RESET
Power-On Delay is
214 Cycles for Non-Master Mode—11 to 33 ms
216 Cycles for Master Mode—43 to 130 ms
Operational
Mode
Clear Is
~ 200 Cycles for the XC3020A—130 to 400 µs
~ 250 Cycles for the XC3030A—165 to 500 µs
~ 290 Cycles for the XC3042A—195 to 580 µs
~ 330 Cycles for the XC3064A—220 to 660 µs
~ 375 Cycles for the XC3090A—250 to 750 µs
X3399
Figure 20: A State Diagram of the Configuration Process for Power-up and Reprogram.
November 9, 1998 (Version 3.1)
7-19
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XC3000 Series Field Programmable Gate Arrays
A re-program is initiated.when a configured XC3000 series
device senses a High-to-Low transition and subsequent >6
µs Low level on the DONE/PROG package pin, or, if this
pin is externally held permanently Low, a High-to-Low transition and subsequent >6 µs Low time on the RESET package pin.
The device returns to the Clear state where the configuration memory is cleared and mode lines re-sampled, as for
an aborted configuration. The complete configuration program is cleared and loaded during each configuration program cycle.
Length count control allows a system of multiple Field Programmable Gate Arrays, of assorted sizes, to begin operation in a synchronized fashion. The configuration program
11111111
0010
< 24-Bit Length Count >
1111
generated by the development system begins with a preamble of 111111110010 followed by a 24-bit length count
representing the total number of configuration clocks
needed to complete loading of the configuration program(s). The data framing is shown in Figure 21. All
FPGAs connected in series read and shift preamble and
length count in on positive and out on negative configuration clock edges. A device which has received the preamble and length count then presents a High Data Out until it
has intercepted the appropriate number of data frames.
When the configuration program memory of an FPGA is full
and the length count does not yet compare, the device
shifts any additional data through, as it did for preamble
and length count. When the FPGA configuration memory is
full and the length count compares, the device will execute
—Dummy Bits*
—Preamble Code
—Configuration Program Length
—Dummy Bits (4 Bits Minimum)
0 <Data Frame # 001 > 111
0 <Data Frame # 002 > 111
0 <Data Frame # 003 > 111
.
.
.
.
.
.
.
.
.
0 <Data Frame # 196 > 111
0 <Data Frame # 197 > 111
1111
Header
For XC3120
197 Configuration Data Frames
Program Data
(Each Frame Consists of:
A Start Bit (0)
A 71-Bit Data Field
Three Stop Bits
Repeated for Each Logic
Cell Array in a Daisy Chain
Postamble Code (4 Bits Minimum)
*The LCA Device Require Four Dummy Bits Min; Software Generates Eight Dummy Bits
Device
Gates
CLBs
XC3020A
XC3020L
XC3120A
1,000 to 1,500
XC3030A
XC3030L
XC3130A
1,500 to 2,000
XC3042A
XC3042L
XC3142A
XC3142L
2,000 to 3,000
X5300_01
XC3064A
XC3064L
XC3164A
3,500 to 4,500
XC3090A
XC3090L
XC3190A
XC3190L
5,000 to 6,000
XC3195A
6,500 to 7,500
64
100
144
224
320
484
Row x Col
IOBs
(8 x 8)
64
(10 x 10)
80
(12 x 12)
96
(16 x 14)
120
(20 x 16)
144
(22 x 22)
176
Flip-flops
256
360
480
688
928
1,320
Horizontal Longlines
TBUFs/Horizontal LL
16
9
20
11
24
13
32
15
40
17
44
23
Bits per Frame
(including1 start and 3 stop bits)
75
92
108
140
172
188
Frames
197
241
285
329
373
505
Program Data =
Bits x Frames + 4 bits
(excludes header)
14,779
22,176
30,784
46,064
64,160
94,944
PROM size (bits) =
Program Data
+ 40-bit Header
14,819
22,216
30,824
46,104
64,200
94,984
Figure 21: Internal Configuration Data Structure for an FPGA. This shows the preamble, length count and data
frames generated by the Development System.
The Length Count produced by the program = [(40-bit preamble + sum of program data + 1 per daisy chain device)
rounded up to multiple of 8] – (2 ≤ K ≤ 4) where K is a function of DONE and RESET timing selected. An additional 8 is
added if roundup increment is less than K. K additional clocks are needed to complete start-up after length count is
reached.
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November 9, 1998 (Version 3.1)
R
XC3000 Series Field Programmable Gate Arrays
a synchronous start-up sequence and become operational.
See Figure 22. Two CCLK cycles after the completion of
loading configuration data, the user I/O pins are enabled as
configured. As selected, the internal user-logic RESET is
released either one clock cycle before or after the I/O pins
become active. A similar timing selection is programmable
for the DONE/PROG output signal. DONE/PROG may also
be programmed to be an open drain or include a pull-up
resistor to accommodate wired ANDing. The High During
Configuration (HDC) and Low During Configuration (LDC)
are two user I/O pins which are driven active while an
FPGA is in its Initialization, Clear or Configure states. They
and DONE/PROG provide signals for control of external
logic signals such as RESET, bus enable or PROM enable
during configuration. For parallel Master configuration
modes, these signals provide PROM enable control and
allow the data pins to be shared with user logic signals.
User I/O inputs can be programmed to be either TTL or
CMOS compatible thresholds. At power-up, all inputs have
TTL thresholds and can change to CMOS thresholds at the
completion of configuration if the user has selected CMOS
thresholds. The threshold of PWRDWN and the direct clock
inputs are fixed at a CMOS level.
If the crystal oscillator is used, it will begin operation before
configuration is complete to allow time for stabilization
before it is connected to the internal circuitry.
Configuration Data
Configuration data to define the function and interconnection within a Field Programmable Gate Array is loaded from
an external storage at power-up and after a re-program signal. Several methods of automatic and controlled loading of
the required data are available. Logic levels applied to
mode selection pins at the start of configuration time determine the method to be used. See Table 1. The data may be
either bit-serial or byte-parallel, depending on the configuration mode. The different FPGAs have different sizes and
numbers of data frames. To maintain compatibility between
various device types, the Xilinx product families use compatible configuration formats. For the XC3020A, configuration requires 14779 bits for each device, arranged in 197
data frames. An additional 40 bits are used in the header.
See Figure 22. The specific data format for each device is
produced by the development system and one or more of
these files can then be combined and appended to a length
count preamble and be transformed into a PROM format
file by the development system. A compatibility exception
precludes the use of an XC2000-series device as the master for XC3000-series devices if their DONE or RESET are
programmed to occur after their outputs become active.
The Tie Option defines output levels of unused blocks of a
design and connects these to unused routing resources.
This prevents indeterminate levels that might produce parasitic supply currents. If unused blocks are not sufficient to
complete the tie, the user can indicate nets which must not
Postamble
Last Frame
Data Frame
12
24
4
3
3
4
STOP
DIN
Stop
Preamble
Length Count
Data
Start
Bit
Length Count*
Start
Bit
The configuration data consists of a composite
* 40-bit preamble/length count, followed by one or
more concatenated FPGA programs, separated by
4-bit postambles. An additional final postamble bit
is added for each slave device and the result rounded
up to a byte boundary. The length count is two less
than the number of resulting bits.
Weak Pull-Up
PROGRAM
Timing of the assertion of DONE and
termination of the INTERNAL RESET
may each be programmed to occur
one cycle before or after the I/O outputs
become active.
Heavy lines indicate the default condition
I/O Active
DONE
Internal Reset
X5988
Figure 22: Configuration and Start-up of One or More FPGAs.
November 9, 1998 (Version 3.1)
7-21
7
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XC3000 Series Field Programmable Gate Arrays
be used to drive the remaining unused routing, as that
might affect timing of user nets. Tie can be omitted for quick
breadboard iterations where a few additional milliamps of
Icc are acceptable.
The configuration bitstream begins with eight High preamble bits, a 4-bit preamble code and a 24-bit length count.
When configuration is initiated, a counter in the FPGA is set
to zero and begins to count the total number of configuration clock cycles applied to the device. As each configuration data frame is supplied to the device, it is internally
assembled into a data word, which is then loaded in parallel
into one word of the internal configuration memory array.
The configuration loading process is complete when the
current length count equals the loaded length count and the
required configuration program data frames have been
written. Internal user flip-flops are held Reset during configuration.
Two user-programmable pins are defined in the unconfigured Field Programmable Gate Array. High During Configuration (HDC) and Low During Configuration (LDC) as well
as DONE/PROG may be used as external control signals
during configuration. In Master mode configurations it is
convenient to use LDC as an active-Low EPROM Chip
Enable. After the last configuration data bit is loaded and
the length count compares, the user I/O pins become
active. Options allow timing choices of one clock earlier or
later for the timing of the end of the internal logic RESET
and the assertion of the DONE signal. The open-drain
DONE/PROG output can be AND-tied with multiple devices
and used as an active-High READY, an active-Low PROM
enable or a RESET to other portions of the system. The
state diagram of Figure 20 illustrates the configuration process.
Configuration Modes
Master Mode
In Master mode, the FPGA automatically loads configuration data from an external memory device. There are three
Master modes that use the internal timing source to supply
the configuration clock (CCLK) to time the incoming data.
Master Serial mode uses serial configuration data supplied
to Data-in (DIN) from a synchronous serial source such as
the Xilinx Serial Configuration PROM shown in Figure 23.
Master Parallel Low and High modes automatically use
parallel data supplied to the D0–D7 pins in response to the
16-bit address generated by the FPGA. Figure 25 shows
an example of the parallel Master mode connections
required. The HEX starting address is 0000 and increments
for Master Low mode and it is FFFF and decrements for
Master High mode. These two modes provide address
compatibility with microprocessors which begin execution
from opposite ends of memory.
7-22
Peripheral Mode
Peripheral mode provides a simplified interface through
which the device may be loaded byte-wide, as a processor
peripheral. Figure 27 shows the peripheral mode connections. Processor write cycles are decoded from the common assertion of the active low Write Strobe (WS), and two
active low and one active high Chip Selects (CS0, CS1,
CS2). The FPGA generates a configuration clock from the
internal timing generator and serializes the parallel input
data for internal framing or for succeeding slaves on Data
Out (DOUT). A output High on READY/BUSY pin indicates
the completion of loading for each byte when the input register is ready for a new byte. As with Master modes, Peripheral mode may also be used as a lead device for a
daisy-chain of slave devices.
Slave Serial Mode
Slave Serial mode provides a simple interface for loading
the Field Programmable Gate Array configuration as
shown in Figure 29. Serial data is supplied in conjunction
with a synchronizing input clock. Most Slave mode applications are in daisy-chain configurations in which the data
input is driven from the previous FPGA’s data out, while the
clock is supplied by a lead device in Master or Peripheral
mode. Data may also be supplied by a processor or other
special circuits.
Daisy Chain
The development system is used to create a composite
configuration for selected FPGAs including: a preamble, a
length count for the total bitstream, multiple concatenated
data programs and a postamble plus an additional fill bit
per device in the serial chain. After loading and passing-on
the preamble and length count to a possible daisy-chain, a
lead device will load its configuration data frames while providing a High DOUT to possible down-stream devices as
shown in Figure 25. Loading continues while the lead
device has received its configuration program and the current length count has not reached the full value. The additional data is passed through the lead device and appears
on the Data Out (DOUT) pin in serial form. The lead device
also generates the Configuration Clock (CCLK) to synchronize the serial output data and data in of down-stream
FPGAs. Data is read in on DIN of slave devices by the positive edge of CCLK and shifted out the DOUT on the negative edge of CCLK. A parallel Master mode device uses its
internal timing generator to produce an internal CCLK of 8
times its EPROM address rate, while a Peripheral mode
device produces a burst of 8 CCLKs for each chip select
and write-strobe cycle. The internal timing generator continues to operate for general timing and synchronization of
inputs in all modes.
November 9, 1998 (Version 3.1)
R
XC3000 Series Field Programmable Gate Arrays
Special Configuration Functions
The configuration data includes control over several special functions in addition to the normal user logic functions
and interconnect.
•
•
•
•
•
•
Input thresholds
Readback disable
DONE pull-up resistor
DONE timing
RESET timing
Oscillator frequency divided by two
Each of these functions is controlled by configuration data
bits which are selected as part of the normal development
system bitstream generation process.
Input Thresholds
Prior to the completion of configuration all FPGA input
thresholds are TTL compatible. Upon completion of configuration, the input thresholds become either TTL or CMOS
compatible as programmed. The use of the TTL threshold
option requires some additional supply current for threshold shifting. The exception is the threshold of the
PWRDWN input and direct clocks which always have a
CMOS input. Prior to the completion of configuration the
user I/O pins each have a high impedance pull-up. The
configuration program can be used to enable the IOB
pull-up resistors in the Operational mode to act either as an
input load or to avoid a floating input on an otherwise
unused pin.
Readback
The contents of a Field Programmable Gate Array may be
read back if it has been programmed with a bitstream in
which the Readback option has been enabled. Readback
may be used for verification of configuration and as a
method of determining the state of internal logic nodes during debugging. There are three options in generating the
configuration bitstream.
•
•
•
“Never” inhibits the Readback capability.
“One-time,” inhibits Readback after one Readback has
been executed to verify the configuration.
“On-command” allows unrestricted use of Readback.
Readback is accomplished without the use of any of the
user I/O pins; only M0, M1 and CCLK are used. The initiation of Readback is produced by a Low to High transition of
the M0/RTRIG (Read Trigger) pin. The CCLK input must
then be driven by external logic to read back the configuration data. The first three Low-to-High CCLK transitions
clock out dummy data. The subsequent Low-to-High CCLK
transitions shift the data frame information out on the
M1/RDATA (Read Data) pin. Note that the logic polarity is
always inverted, a zero in configuration becomes a one in
Readback, and vice versa. Note also that each Readback
frame has one Start bit (read back as a one) but, unlike in
November 9, 1998 (Version 3.1)
configuration, each Readback frame has only one Stop bit
(read back as a zero). The third leading dummy bit mentioned above can be considered the Start bit of the first
frame. All data frames must be read back to complete the
process and return the Mode Select and CCLK pins to their
normal functions.
Readback data includes the current state of each CLB
flip-flop, each input flip-flop or latch, and each device pad.
These data are imbedded into unused configuration bit
positions during Readback. This state information is used
by the development system In-Circuit Verifier to provide
visibility into the internal operation of the logic while the
system is operating. To readback a uniform time-sample of
all storage elements, it may be necessary to inhibit the system clock.
Reprogram
To initiate a re-programming cycle, the dual-function pin
DONE/PROG must be given a High-to-Low transition. To
reduce sensitivity to noise, the input signal is filtered for two
cycles of the FPGA internal timing generator. When reprogram begins, the user-programmable I/O output buffers are
disabled and high-impedance pull-ups are provided for the
package pins. The device returns to the Clear state and
clears the configuration memory before it indicates ‘initialized’. Since this Clear operation uses chip-individual internal timing, the master might complete the Clear operation
and then start configuration before the slave has completed
the Clear operation. To avoid this problem, the slave INIT
pins must be AND-wired and used to force a RESET on the
master (see Figure 25). Reprogram control is often implemented using an external open-collector driver which pulls
DONE/PROG Low. Once a stable request is recognized,
the DONE/PROG pin is held Low until the new configuration has been completed. Even if the re-program request is
externally held Low beyond the configuration period, the
FPGA will begin operation upon completion of configuration.
DONE Pull-up
DONE/PROG is an open-drain I/O pin that indicates the
FPGA is in the operational state. An optional internal
pull-up resistor can be enabled by the user of the development system. The DONE/PROG pins of multiple FPGAs in
a daisy-chain may be connected together to indicate all are
DONE or to direct them all to reprogram.
DONE Timing
The timing of the DONE status signal can be controlled by
a selection to occur either a CCLK cycle before, or after, the
outputs going active. See Figure 22. This facilitates control
of external functions such as a PROM enable or holding a
system in a wait state.
7-23
7
R
XC3000 Series Field Programmable Gate Arrays
RESET Timing
As with DONE timing, the timing of the release of the internal reset can be controlled to occur either a CCLK cycle
before, or after, the outputs going active. See Figure 22.
This reset keeps all user programmable flip-flops and
latches in a zero state during configuration.
but with incorrect configuration and the possibility of internal contention.
Crystal Oscillator Division
An XC3000A/XC3100A/XC3000L/XC3100L device starts
any new frame only if the three preceding bits are all ones.
If this check fails, it pulls INIT Low and stops the internal
configuration, although the Master CCLK keeps running.
The user must then start a new configuration by applying a
>6 µs Low level on RESET.
A selection allows the user to incorporate a dedicated
divide-by-two flip-flop between the crystal oscillator and the
alternate clock line. This guarantees a symmetrical clock
signal. Although the frequency stability of a crystal oscillator is very good, the symmetry of its waveform can be
affected by bias or feedback drive.
This simple check does not protect against random bit
errors, but it offers almost 100 percent protection against
erroneous configuration files, defective configuration data
sources, synchronization errors between configuration
source and FPGA, or PC-board level defects, such as broken lines or solder-bridges.
Bitstream Error Checking
Reset Spike Protection
Bitstream error checking protects against erroneous configuration.
A separate modification slows down the RESET input
before configuration by using a two-stage shift register
driven from the internal clock. It tolerates submicrosecond
High spikes on RESET before configuration. The XC3000
master can be connected like an XC4000 master, but with
its RESET input used instead of INIT. (On XC3000, INIT is
output only).
Each Xilinx FPGA bitstream consists of a 40-bit preamble,
followed by a device-specific number of data frames. The
number of bits per frame is also device-specific; however,
each frame ends with three stop bits (111) followed by a
start bit for the next frame (0).
All devices in all XC3000 families start reading in a new
frame when they find the first 0 after the end of the previous
frame. An original XC3000 device does not check for the
correct stop bits, but XC3000A, XC3100A, XC3000L, and
XC3100L devices check that the last three bits of any frame
are actually 111.
Under normal circumstances, all these FPGAs behave the
same way; however, if the bitstream is corrupted, an
XC3000 device will always start a new frame as soon as it
finds the first 0 after the end of the previous frame, even if
the data is completely wrong or out-of-sync. Given sufficient zeros in the data stream, the device will also go Done,
7-24
Soft Start-up
After configuration, the outputs of all FPGAs in a
daisy-chain become active simultaneously, as a result of
the same CCLK edge. In the original XC3000/3100
devices, each output becomes active in either fast or
slew-rate limited mode, depending on the way it is configured. This can lead to large ground-bounce signals. In
XC3000A, XC3000L, XC3100A, and XC3100L devices, all
outputs become active first in slew-rate limited mode,
reducing the ground bounce. After this soft start-up, each
individual output slew rate is again controlled by the
respective configuration bit.
November 9, 1998 (Version 3.1)
R
XC3000 Series Field Programmable Gate Arrays
Configuration Timing
This section describes the configuration modes in detail.
Master Serial Mode
DOUT changes on the falling CCLK edge, and the next
device in the daisy-chain accepts data on the subsequent
rising CCLK edge.
In Master Serial mode, the CCLK output of the lead FPGA
drives a Xilinx Serial PROM that feeds the DIN input. Each
rising edge of the CCLK output increments the Serial
PROM internal address counter. This puts the next data bit
on the SPROM data output, connected to the DIN pin. The
lead FPGA accepts this data on the subsequent rising
CCLK edge.
The SPROM CE input can be driven from either LDC or
DONE. Using LDC avoids potential contention on the DIN
pin, if this pin is configured as user-I/O, but LDC is then
restricted to be a permanently High user output. Using
DONE also avoids contention on DIN, provided the early
DONE option is invoked.
The lead FPGA then presents the preamble data (and all
data that overflows the lead device) on its DOUT pin. There
is an internal delay of 1.5 CCLK periods, which means that
*
IF READBACK
IS
ACTIVATED, A
5-kΩ RESISTOR IS
REQUIRED IN
SERIES WITH M1
+5 V
*
M0
DURING CONFIGURATION
THE 5 kΩ M2 PULL-DOWN
RESISTOR OVERCOMES THE
INTERNAL PULL-UP,
BUT IT ALLOWS M2 TO
BE USER I/O.
M1
PWRDWN
TO DIN OF OPTIONAL
DAISY-CHAINED LCAs WITH
DIFFERENT CONFIGURATIONS
DOUT
M2
TO CCLK OF OPTIONAL
DAISY-CHAINED LCAs WITH
DIFFERENT CONFIGURATIONS
+5V
HDC
LDC
GENERALPURPOSE
USER I/O
PINS
INIT
7
OTHER
I/O PINS
TO CCLK OF OPTIONAL
SLAVE LCAs WITH IDENTICAL
CONFIGURATIONS
•
•
•
•
•
XC3000
FPGA
DEVICE
TO DIN OF OPTIONAL
SLAVE LCAs WITH IDENTICAL
CONFIGURATIONS
+5 V
RESET
RESET
VCC
DIN
CCLK
VPP
DATA
DATA
CLK
CLK
SCP
D/P
CE
INIT
OE/RESET
CEO
CE
CASCADED
SERIAL
MEMORY
OE/RESET
XC17xx
(LOW RESETS THE XC17xx ADDRESS POINTER)
X5989_01
Figure 23: Master Serial Mode Circuit Diagram
November 9, 1998 (Version 3.1)
7-25
R
XC3000 Series Field Programmable Gate Arrays
CCLK
(Output)
2 TCKDS
1
TDSCK
Serial Data In
Serial DOUT
(Output)
n
n+1
n–3
n–2
n+2
n–1
n
X3223
CCLK
Description
Data In setup
Data In hold
Symbol
1
2
TDSCK
CKDS
Min
60
0
Max
Units
ns
ns
Notes: 1. At power-up, VCC must rise from 2.0 V to VCC min in less than 25 ms. If this is not possible, configuration can be delayed by
holding RESET Low until VCC has reached 4.0 V (2.5 V for the XC3000L). A very long VCC rise time of >100 ms, or a
non-monotonically rising VCC may require >6-µs High level on RESET, followed by a >6-µs Low level on RESET and D/P
after VCC has reached 4.0 V (2.5 V for the XC3000L).
2. Configuration can be controlled by holding RESET Low with or until after the INIT of all daisy-chain slave-mode devices is
High.
3. Master-serial-mode timing is based on slave-mode testing.
Figure 24: Master Serial Mode Programming Switching Characteristics
7-26
November 9, 1998 (Version 3.1)
R
XC3000 Series Field Programmable Gate Arrays
Master Parallel Mode
In Master Parallel mode, the lead FPGA directly addresses
an industry-standard byte-wide EPROM and accepts eight
data bits right before incrementing (or decrementing) the
address outputs.
The eight data bits are serialized in the lead FPGA, which
then presents the preamble data (and all data that overflows the lead device) on the DOUT pin. There is an inter-
* If Readback is
*
+5 V
Activated, a
5-kΩ Resistor is
Required in
Series With M1
5 kΩ
+5 V
nal delay of 1.5 CCLK periods, after the rising CCLK edge
that accepts a byte of data, and also changes the EPROM
address, until the falling CCLK edge that makes the LSB
(D0) of this byte appear at DOUT. This means that DOUT
changes on the falling CCLK edge, and the next device in
the daisy chain accepts data on the subsequent rising
CCLK edge.
*
+5 V
M0 M1PWRDWN
M0 M1PWRDWN
CCLK
CCLK
DOUT
DIN
HDC
RCLK
5 kΩ
A14
LDC
A13
A13
A12
A12
A11
A11
A10
A10
A9
A9
D7
A8
A8
D6
A7
A7
D7
D5
A6
A6
D6
D4
A5
A5
D5
D3
.....
FPGA
Master
EPROM
A4
A4
D4
A3
A3
D3
D1
A2
A2
D2
D0
A1
A1
D1
A0
A0
D0
D/P
OE
INIT
N.C.
GeneralPurpose
User I/O
Pins
LDC
Other
I/O Pins
INIT
D2
RESET
Other
I/O Pins
M2
...
A14
Other
I/O Pins
FPGA
Slave #n
HDC
...
HDC
DOUT
DIN
...
A15
5 kΩ
CCLK
M2
A15
GeneralPurpose
User I/O
Pins
M0 M1PWRDWN
DOUT
FPGA
Slave #1
M2
*
+5 V
GeneralPurpose
User I/O
Pins
INIT
D/P
D/P
RESET
Reset
7
Note: XC2000 Devices Do Not
Have INIT to Hold Off a Master
Device. Reset of a Master Device
Should be Asserted by an External
Timing Circuit to Allow for LCA CCLK
Variations in Clear State Time.
CE
+5 V
8
Reprogram
Open
Collector
5 kΩ Each
System Reset
X5990
Figure 25: Master Parallel Mode Circuit Diagram
November 9, 1998 (Version 3.1)
7-27
R
XC3000 Series Field Programmable Gate Arrays
A0-A15
(output)
Address for Byte n
Address for Byte n + 1
1 TRAC
D0-D7
Byte
3 TRCD
2 TDRC
RCLK
(output)
7 CCLKs
CCLK
CCLK
(output)
DOUT
(output)
D6
D7
Byte n - 1
RCLK
Description
To address valid
To data setup
To data hold
RCLK High
RCLK Low
1
2
3
Symbol
TRAC
TDRC
TRCD
TRCH
TRCL
X5380
Min
0
60
0
600
4.0
Max
200
Units
ns
ns
ns
ns
µs
Notes: 1. At power-up, VCC must rise from 2.0 V to VCC min in less than 25 ms. If this is not possible, configuration can be delayed by
holding RESET Low until VCC has reached 4.0 V (2.5 V for the XC3000L). A very long VCC rise time of >100 ms, or a
non-monotonically rising VCC may require a >6-µs High level on RESET, followed by a >6-µs Low level on RESET and D/P
after VCC has reached 4.0 V (2.5 V for the XC3000L).
2. Configuration can be controlled by holding RESET Low with or until after the INIT of all daisy-chain slave-mode devices is
High.
This timing diagram shows that the EPROM requirements are extremely relaxed:
EPROM access time can be longer than 4000 ns. EPROM data output has no hold time requirements.
Figure 26: Master Parallel Mode Programming Switching Characteristics
7-28
November 9, 1998 (Version 3.1)
R
XC3000 Series Field Programmable Gate Arrays
Peripheral Mode
Peripheral mode uses the trailing edge of the logic AND
condition of the CS0, CS1, CS2, and WS inputs to accept
byte-wide data from a microprocessor bus. In the lead
FPGA, this data is loaded into a double-buffered UART-like
parallel-to-serial converter and is serially shifted into the
internal logic. The lead FPGA presents the preamble data
(and all data that overflows the lead device) on the DOUT
pin.
when the byte-wide input buffer has transferred its information into the shift register, and the buffer is ready to receive
new data. The length of the BUSY signal depends on the
activity in the UART. If the shift register had been empty
when the new byte was received, the BUSY signal lasts for
only two CCLK periods. If the shift register was still full
when the new byte was received, the BUSY signal can be
as long as nine CCLK periods.
The Ready/Busy output from the lead device acts as a
handshake signal to the microprocessor. RDY/BUSY goes
Low when a byte has been received, and goes High again
Note that after the last byte has been entered, only seven
of its bits are shifted out. CCLK remains High with DOUT
equal to bit 6 (the next-to-last bit) of the last byte entered.
+5 V
CONTROL
SIGNALS
ADDRESS
BUS
DATA
BUS
*
8
M0
D0–7
5 kΩ
M1 PWR
DWN
D0–7
CCLK
OPTIONAL
DAISY-CHAINED
FPGAs WITH DIFFERENT
CONFIGURATIONS
DOUT
...
ADDRESS
DECODE
LOGIC
* IF READBACK IS
ACTIVATED, A
5-kΩ RESISTOR IS
REQUIRED IN SERIES
WITH M1
M2
CS0
HDC
+5 V
FPGA
7
GENERALPURPOSE
USER I/O
PINS
LDC
CS1
CS2
...
OTHER
I/O PINS
RDY/BUSY
WS
INIT
REPROGRAM
OC
D/P
RESET
X5991
Figure 27: Peripheral Mode Circuit Diagram
November 9, 1998 (Version 3.1)
7-29
R
XC3000 Series Field Programmable Gate Arrays
WRITE TO FPGA
WS, CS0, CS1
CS2
1
TCA
2
TDC
D0-D7
TCD
3
Valid
CCLK
4 TWTRB
TBUSY
6
RDY/BUSY
DOUT
D6
D7
D0
D1
Previous Byte
D2
New Byte
X5992
WRITE
RDY
Description
Effective Write time required
(Assertion of CS0, CS1, CS2, WS)
DIN Setup time required
DIN Hold time required
RDY/BUSY delay after end of WS
2
3
4
TDC
TCD
TWTRB
60
0
Earliest next WS after end of BUSY
5
TRBWT
0
BUSY Low time generated
6
TBUSY
2.5
1
Symbol
TCA
Min
100
Max
60
Units
ns
ns
ns
ns
ns
9
CCLK
periods
Notes: 1. At power-up, VCC must rise from 2.0 V to VCC min in less than 25 ms. If this is not possible, configuration can be delayed by
holding RESET Low until VCC has reached 4.0 V (2.5 V for the XC3000L). A very long VCC rise time of >100 ms, or a
non-monotonically rising VCC may require a >6-µs High level on RESET, followed by a >6-µs Low level on RESET and D/P
after VCC has reached 4.0 V (2.5 V for the XC3000L).
2. Configuration must be delayed until the INIT of all FPGAs is High.
3. Time from end of WS to CCLK cycle for the new byte of data depends on completion of previous byte processing and the
phase of the internal timing generator for CCLK.
4. CCLK and DOUT timing is tested in slave mode.
5. TBUSY indicates that the double-buffered parallel-to-serial converter is not yet ready to receive new data. The shortest TBUSY
occurs when a byte is loaded into an empty parallel-to-serial converter. The longest TBUSY occurs when a new word is
loaded into the input register before the second-level buffer has started shifting out data.
Note: This timing diagram shows very relaxed requirements: Data need not be held beyond the rising edge of WS. BUSY
will go active within 60 ns after the end of WS. BUSY will stay active for several microseconds. WS may be asserted
immediately after the end of BUSY.
Figure 28: Peripheral Mode Programming Switching Characteristics
7-30
November 9, 1998 (Version 3.1)
R
XC3000 Series Field Programmable Gate Arrays
Slave Serial Mode
In Slave Serial mode, an external signal drives the CCLK
input(s) of the FPGA(s). The serial configuration bitstream
must be available at the DIN input of the lead FPGA a short
set-up time before each rising CCLK edge. The lead device
then presents the preamble data (and all data that over-
flows the lead device) on its DOUT pin. There is an internal
delay of 0.5 CCLK periods, which means that DOUT
changes on the falling CCLK edge, and the next device in
the daisy-chain accepts data on the subsequent rising
CCLK edge.
+5 V
* If Readback is
Activated, a
5-kΩ Resistor is
Required in
Series with M1
*
M0
M1
PWRDWN
Micro
Computer
5 kΩ
STRB
CCLK
D0
I/O
Port
DIN
DOUT
D1
HDC
D2
LDC
D3
Optional
Daisy-Chained
LCAs with
Different
Configurations
M2
GeneralPurpose
User I/O
Pins
+5 V
FPGA
D4
D6
D7
RESET
...
Other
I/O Pins
D5
D/P
7
INIT
RESET
X5993
Figure 29: Slave Serial Mode Circuit Diagram
November 9, 1998 (Version 3.1)
7-31
R
XC3000 Series Field Programmable Gate Arrays
DIN
Bit n
1 TDCC
Bit n + 1
2 TCCD
5 TCCL
CCLK
4 TCCH
DOUT
(Output)
3 TCCO
Bit n - 1
Bit n
X5379
Description
To DOUT
CCLK
DIN setup
DIN hold
High time
Low time (Note 1)
Frequency
3
1
2
4
5
Symbol
TCCO
Min
TDCC
TCCD
TCCH
TCCL
FCC
60
0
0.05
0.05
Max
100
Units
ns
5.0
10
ns
ns
µs
µs
MHz
Notes: 1. The max limit of CCLK Low time is caused by dynamic circuitry inside the FPGA.
2. Configuration must be delayed until the INIT of all FPGAs is High.
3. At power-up, VCC must rise from 2.0 V to VCC min in less than 25 ms. If this is not possible, configuration can be delayed by
holding RESET Low until VCC has reached 4.0 V (2.5 V for the XC3000L). A very long VCC rise time of >100 ms, or a
non-monotonically rising VCC may require a >6-µs High level on RESET, followed by a >6-µs Low level on RESET and D/P
after VCC has reached 4.0 V (2.5 V for the XC3000L).
Figure 30: Slave Serial Mode Programming Switching Characteristics
7-32
November 9, 1998 (Version 3.1)
R
XC3000 Series Field Programmable Gate Arrays
Program Readback Switching Characteristics
DONE/PROG
(OUTPUT)
1 TRTH
RTRIG (M0)
2 TRTCC
4 TCCL
4 TCCL
CCLK(1)
5
3 TCCRD
M1 Input/
RDATA Output
HI-Z
VALID
READBACK OUTPUT
VALID
READBACK OUTPUT
X6116
RTRIG
CCLK
Notes: 1.
2.
3.
4.
Description
RTRIG High
RTRIG setup
RDATA delay
High time
Low time
1
2
3
4
5
Symbol
TRTH
TRTCC
TCCRD
TCCHR
TCCLR
Min
250
200
Max
100
0.5
0.5
5
Units
ns
ns
ns
µs
µs
During Readback, CCLK frequency may not exceed 1 MHz.
RETRIG (M0 positive transition) shall not be done until after one clock following active I/O pins.
Readback should not be initiated until configuration is complete.
TCCLR is 5 µs min to 15 µs max for XC3000L.
November 9, 1998 (Version 3.1)
7-33
7
R
XC3000 Series Field Programmable Gate Arrays
General XC3000 Series Switching Characteristics
4 TMRW
RESET
2 TMR
3 TRM
M0/M1/M2
5 TPGW
DONE/PROG
6 TPGI
INIT
(Output)
User State
Clear State
Configuration State
PWRDWN
Note 3
VCC (Valid)
VCCPD
X5387
Description
M0, M1, M2 setup time required
M0, M1, M2 hold time required
RESET (2)
RESET Width (Low) req. for Abort
Width (Low) required for Re-config.
DONE/PROG
INIT response after D/P is pulled Low
PWRDWN (3) Power Down VCC
2
3
4
5
6
Symbol
TMR
TRM
TMRW
TPGW
TPGI
VCCPD
Min
1
4.5
6
6
Max
7
2.3
Units
µs
µs
µs
µs
µs
V
Notes: 1. At power-up, VCC must rise from 2.0 V to VCC min in less than 25 ms. If this is not possible, configuration can be delayed by
holding RESET Low until Vcc has reached 4.0 V (2.5 V for XC3000L). A very long Vcc rise time of >100 ms, or a
non-monotonically rising VCC may require a >1-µs High level on RESET, followed by a >6-µs Low level on RESET and D/P
after Vcc has reached 4.0 V (2.5 V for XC3000L).
2. RESET timing relative to valid mode lines (M0, M1, M2) is relevant when RESET is used to delay configuration. The
specified hold time is caused by a shift-register filter slowing down the response to RESET during configuration.
3. PWRDWN transitions must occur while VCC >4.0 V(2.5 V for XC3000L).
7-34
November 9, 1998 (Version 3.1)
R
XC3000 Series Field Programmable Gate Arrays
Device Performance
The XC3000 families of FPGAs can achieve very high performance. This is the result of
•
•
•
A sub-micron manufacturing process, developed and
continuously being enhanced for the production of
state-of-the-art CMOS SRAMs.
Careful optimization of transistor geometries, circuit
design, and lay-out, based on years of experience with
the XC3000 family.
A look-up table based, coarse-grained architecture that
can collapse multiple-layer combinatorial logic into a
single function generator. One CLB can implement up
to four layers of conventional logic in as little as 1.5 ns.
Actual system performance is determined by the timing of
critical paths, including the delay through the combinatorial
and sequential logic elements within CLBs and IOBs, plus
the delay in the interconnect routing. The AC-timing specifications state the worst-case timing parameters for the various logic resources available in the XC3000-families
architecture. Figure 31 shows a variety of elements
involved in determining system performance.
Logic block performance is expressed as the propagation
time from the interconnect point at the input to the block to
the output of the block in the interconnect area. Since combinatorial logic is implemented with a memory lookup table
within a CLB, the combinatorial delay through the CLB,
called TILO, is always the same, regardless of the function
being implemented. For the combinatorial logic function
driving the data input of the storage element, the critical
timing is data set-up relative to the clock edge provided to
the flip-flop element. The delay from the clock source to the
output of the logic block is critical in the timing signals pro-
duced by storage elements. Loading of a logic-block output
is limited only by the resulting propagation delay of the
larger interconnect network. Speed performance of the
logic block is a function of supply voltage and temperature.
See Figure 32.
Interconnect performance depends on the routing
resources used to implement the signal path. Direct interconnects to the neighboring CLB provide an extremely fast
path. Local interconnects go through switch matrices
(magic boxes) and suffer an RC delay, equal to the resistance of the pass transistor multiplied by the capacitance of
the driven metal line. Longlines carry the signal across the
length or breadth of the chip with only one access delay.
Generous on-chip signal buffering makes performance relatively insensitive to signal fan-out; increasing fan-out from
1 to 8 changes the CLB delay by only 10%. Clocks can be
distributed with two low-skew clock distribution networks.
The tools in the Development System used to place and
route a design in an XC3000 FPGA automatically calculate
the actual maximum worst-case delays along each signal
path. This timing information can be back-annotated to the
design’s netlist for use in timing simulation or examined
with, a static timing analyzer.
Actual system performance is applications dependent. The
maximum clock rate that can be used in a system is determined by the critical path delays within that system. These
delays are combinations of incremental logic and routing
delays, and vary from design to design. In a synchronous
system, the maximum clock rate depends on the number of
combinatorial logic layers between re-synchronizing
flip-flops. Figure 33 shows the achievable clock rate as a
function of the number of CLB layers.
Clock to Output
Combinatorial
Setup
TCKO
TILO
TICK
CLB
TOP
CLB
Logic
CLB
IOB
Logic
PAD
(K)
(K)
CLOCK
IOB
TCKO
PAD
T PID
TOKPO
X3178
Figure 31: Primary Block Speed Factors. Actual timing is a function of various block factors combined with routing.
factors. Overall performance can be evaluated with the timing calculator or by an optional simulation.
November 9, 1998 (Version 3.1)
7-35
7
R
XC3000 Series Field Programmable Gate Arrays
SPECIFIED WORST-CASE VALUES
1.00
5 V)
(4.7
IAL
C
R
ME
COM
MAX
MAX
TA
MILI
RY (
4.5 V
)
NORMALIZED DELAY
0.80
TYPICAL COMMERCIAL
(+ 5.0 V, 25°C)
0.60
TYPICAL MILITARY
0.40
ARY (4.5
.75 V)
ERCIAL (4
MIN COMM
L (5.25 V)
IA
C
ER
M
M
MIN CO
MIN MILIT
V)
Y (5.5 V)
MIN MILITAR
0.20
– 55
– 40
– 20
0
25
40
70
80
100
125
TEMPERATURE (°C)
Figure 32: Relative Delay as a Function of Temperature, Supply Voltage and Processing Variations
X6094
Power
Power Distribution
300
System Clock (MHz)
250
200
150
100
XC3100A-3
50
XC3000A--6
0
CLB Levels:
4 CLBs
Gate Levels:
(4-16)
3 CLBs
(3-12)
2 CLBs
(2-8)
1 CLB
(1-4)
Toggle
Rate
X7065
Figure 33: Clock Rate as a Function of Logic
Complexity (Number of Combinational Levels between
Flip-Flops)
7-36
Power for the FPGA is distributed through a grid to achieve
high noise immunity and isolation between logic and I/O.
Inside the FPGA, a dedicated VCC and ground ring surrounding the logic array provides power to the I/O drivers.
An independent matrix of VCC and groundlines supplies the
interior logic of the device. This power distribution grid provides a stable supply and ground for all internal logic, providing the external package power pins are all connected
and appropriately decoupled. Typically a 0.1-µF capacitor
connected near the VCC and ground pins will provide adequate decoupling.
Output buffers capable of driving the specified 4- or 8-mA
loads under worst-case conditions may be capable of driving as much as 25 to 30 times that current in a best case.
Noise can be reduced by minimizing external load capacitance and reducing simultaneous output transitions in the
same direction. It may also be beneficial to locate heavily
loaded output buffers near the ground pads. The I/O Block
output buffers have a slew-limited mode which should be
used where output rise and fall times are not speed critical.
Slew-limited outputs maintain their dc drive capability, but
generate less external reflections and internal noise.
November 9, 1998 (Version 3.1)
R
XC3000 Series Field Programmable Gate Arrays
Dynamic Power Consumption
One CLB driving three local interconnects
One global clock buffer and clock line
One device output with a 50 pF load
XC3042A
0.25
2.25
1.25
XC3042L
0.17
1.40
1.25
XC3142A
0.25
1.70
1.25
mW per MHz
mW per MHz
mW per MHz
Power Consumption
The Field Programmable Gate Array exhibits the low power
consumption characteristic of CMOS ICs. For any design,
the configuration option of TTL chip input threshold
requires power for the threshold reference. The power
required by the static memory cells that hold the configuration data is very low and may be maintained in a
power-down mode.
Typically, most of power dissipation is produced by external
capacitive loads on the output buffers. This load and frequency dependent power is 25 µW/pF/MHz per output.
Another component of I/O power is the external dc loading
on all output pins.
Internal power dissipation is a function of the number and
size of the nodes, and the frequency at which they change.
In an FPGA, the fraction of nodes changing on a given
clock is typically low (10-20%). For example, in a long
binary counter, the total activity of all counter flip-flops is
equivalent to that of only two CLB outputs toggling at the
clock frequency. Typical global clock-buffer power is
between 2.0 mW/MHz for the XC3020A and 3.5 mW/MHz
for the XC3090A. The internal capacitive load is more a
function of interconnect than fan-out. With a typical load of
three general interconnect segments, each CLB output
requires about 0.25 mW per MHz of its output frequency.
Because the control storage of the FPGA is CMOS static
memory, its cells require a very low standby current for data
retention. In some systems, this low data retention current
characteristic can be used as a method of preserving configurations in the event of a primary power loss. The FPGA
November 9, 1998 (Version 3.1)
has built in powerdown logic which, when activated, will
disable normal operation of the device and retain only the
configuration data. All internal operation is suspended and
output buffers are placed in their high-impedance state with
no pull-ups. Different from the XC3000 family which can be
powered down to a current consumption of a few microamps, the XC3100A draws 5 mA, even in power-down.
This makes power-down operation less meaningful. In contrast, ICCPD for the XC3000L is only 10 µA.
To force the FPGA into the Powerdown state, the user must
pull the PWRDWN pin Low and continue to supply a retention voltage to the VCC pins. When normal power is
restored, VCC is elevated to its normal operating voltage
and PWRDWN is returned to a High. The FPGA resumes
operation with the same internal sequence that occurs at
the conclusion of configuration. Internal-I/O and logic-block
storage elements will be reset, the outputs will become
enabled and the DONE/PROG pin will be released.
When VCC is shut down or disconnected, some power
might unintentionally be supplied from an incoming signal
driving an I/O pin. The conventional electrostatic input protection is implemented with diodes to the supply and
ground. A positive voltage applied to an input (or output)
will cause the positive protection diode to conduct and drive
the VCC connection. This condition can produce invalid
power conditions and should be avoided. A large series
resistor might be used to limit the current or a bipolar buffer
may be used to isolate the input signal.
7-37
7
R
XC3000 Series Field Programmable Gate Arrays
Pin Descriptions
Permanently Dedicated Pins
Once configuration is done, a High-to-Low transition of this
pin will cause an initialization of the FPGA and start a
reconfiguration.
VCC
M0/RTRIG
Two to eight (depending on package type) connections to
the positive V supply voltage. All must be connected.
As Mode 0, this input is sampled on power-on to determine
the power-on delay (214 cycles if M0 is High, 216 cycles if M0
is Low). Before the start of configuration, this input is again
sampled together with M1, M2 to determine the configuration mode to be used.
GND
Two to eight (depending on package type) connections to
ground. All must be connected.
PWRDWN
A Low on this CMOS-compatible input stops all internal
activity, but retains configuration. All flip-flops and latches
are reset, all outputs are 3-stated, and all inputs are interpreted as High, independent of their actual level. When
PWDWN returns High, the FPGA becomes operational
with DONE Low for two cycles of the internal 1-MHz clock.
Before and during configuration, PWRDWN must be High.
If not used, PWRDWN must be tied to VCC.
RESET
This is an active Low input which has three functions.
Prior to the start of configuration, a Low input will delay the
start of the configuration process. An internal circuit senses
the application of power and begins a minimal time-out
cycle. When the time-out and RESET are complete, the
levels of the M lines are sampled and configuration begins.
If RESET is asserted during a configuration, the FPGA is
re-initialized and restarts the configuration at the termination of RESET.
If RESET is asserted after configuration is complete, it provides a global asynchronous RESET of all IOB and CLB
storage elements of the FPGA.
CCLK
During configuration, Configuration Clock is an output of an
FPGA in Master mode or Peripheral mode, but an input in
Slave mode. During Readback, CCLK is a clock input for
shifting configuration data out of the FPGA.
CCLK drives dynamic circuitry inside the FPGA. The Low
time may, therefore, not exceed a few microseconds. When
used as an input, CCLK must be “parked High”. An internal
pull-up resistor maintains High when the pin is not being
driven.
DONE/PROG (D/P)
DONE is an open-drain output, configurable with or without
an internal pull-up resistor of 2 to 8 k Ω. At the completion of
configuration, the FPGA circuitry becomes active in a synchronous order; DONE is programmed to go active High
one cycle either before or after the outputs go active.
7-38
A Low-to-High input transition, after configuration is complete, acts as a Read Trigger and initiates a Readback of
configuration and storage-element data clocked by CCLK.
By selecting the appropriate Readback option when generating the bitstream, this operation may be limited to a single
Readback, or be inhibited altogether.
M1/RDATA
As Mode 1, this input and M0, M2 are sampled before the
start of configuration to establish the configuration mode to
be used. If Readback is never used, M1 can be tied directly
to ground or VCC. If Readback is ever used, M1 must use a
5-kΩ resistor to ground or VCC, to accommodate the
RDATA output.
As an active-Low Read Data, after configuration is complete, this pin is the output of the Readback data.
User I/O Pins That Can Have Special
Functions
M2
During configuration, this input has a weak pull-up resistor.
Together with M0 and M1, it is sampled before the start of
configuration to establish the configuration mode to be
used. After configuration, this pin is a user-programmable
I/O pin.
HDC
During configuration, this output is held at a High level to
indicate that configuration is not yet complete. After configuration, this pin is a user-programmable I/O pin.
LDC
During Configuration, this output is held at a Low level to
indicate that the configuration is not yet complete. After
configuration, this pin is a user-programmable I/O pin. LDC
is particularly useful in Master mode as a Low enable for an
EPROM, but it must then be programmed as a High after
configuration.
INIT
This is an active Low open-drain output with a weak pull-up
and is held Low during the power stabilization and internal
clearing of the configuration memory. It can be used to indicate status to a configuring microprocessor or, as a wired
November 9, 1998 (Version 3.1)
R
XC3000 Series Field Programmable Gate Arrays
AND of several slave mode devices, a hold-off signal for a
master mode device. After configuration this pin becomes a
user-programmable I/O pin.
BCLKIN
This is a direct CMOS level input to the alternate clock
buffer (Auxiliary Buffer) in the lower right corner.
XTL1
This user I/O pin can be used to operate as the output of an
amplifier driving an external crystal and bias circuitry.
XTL2
This user I/O pin can be used as the input of an amplifier
connected to an external crystal and bias circuitry. The I/O
Block is left unconfigured. The oscillator configuration is
activated by routing a net from the oscillator buffer symbol
output and by the MakeBits program.
CS0, CS1, CS2, WS
These four inputs represent a set of signals, three active
Low and one active High, that are used to control configuration-data entry in the Peripheral mode. Simultaneous
assertion of all four inputs generates a Write to the internal
data buffer. The removal of any assertion clocks in the
D0-D7 data. In Master-Parallel mode, WS and CS2 are the
A0 and A1 outputs. After configuration, these pins are
user-programmable I/O pins.
RDY/BUSY
During Peripheral Parallel mode configuration this pin indicates when the chip is ready for another byte of data to be
written to it. After configuration is complete, this pin
becomes a user-programmed I/O pin.
RCLK
During Master Parallel mode configuration, each change
on the A0-15 outputs is preceded by a rising edge on
RCLK, a redundant output signal. After configuration is
complete, this pin becomes a user-programmed I/O pin.
D0-D7
This set of eight pins represents the parallel configuration
byte for the parallel Master and Peripheral modes. After
configuration is complete, they are user-programmed I/O
pins.
A0-A15
During Master Parallel mode, these 16 pins present an
address output for a configuration EPROM. After configuration, they are user-programmable I/O pins.
DIN
During Slave or Master Serial configuration, this pin is used
as a serial-data input. In the Master or Peripheral configuration, this is the Data 0 input. After configuration is complete, this pin becomes a user-programmed I/O pin.
DOUT
During configuration this pin is used to output serial-configuration data to the DIN pin of a daisy-chained slave. After
configuration is complete, this pin becomes a user-programmed I/O pin.
TCLKIN
This is a direct CMOS-level input to the global clock buffer.
This pin can also be configured as a user programmable
I/O pin. However, since TCLKIN is the preferred input to the
global clock net, and the global clock net should be used as
the primary clock source, this pin is usually the clock input
to the chip.
Unrestricted User I/O Pins
I/O
An I/O pin may be programmed by the user to be an Input
or an Output pin following configuration. All unrestricted I/O
pins, plus the special pins mentioned on the following page,
have a weak pull-up resistor that becomes active as soon
as the device powers up, and stays active until the end of
configuration.
Note: Before and during configuration, all outputs that are not used for the configuration process are 3-stated with a weak
pull-up resistor.
November 9, 1998 (Version 3.1)
7-39
7
R
XC3000 Series Field Programmable Gate Arrays
Pin Functions During Configuration
***
Configuration Mode <M2:M1:M0>
SLAVE
SERIAL
<1:1:1>
MASTERSERIAL
<0:0:0>
POWR
DWN
(I)
POWER
DWN
(I)
M1 (HIGH) (I)
M0 (HIGH) (I)
**
****
PERIPH
<1:0:1>
MASTERHIGH
<1:1:0>
MASTERLOW
<1:0:0>
100
44
64
68
84
84
100 VQFP 132
144
160
175
176
208
PLCC VQFP PLCC PLCC PGA PQFP TQFP PGA TQFP PQFP PGA TQFP PQFP
POWER
DWN
(I)
POWER
DWN
(I)
POWER
DWN
(I)
7
17
10
12
M1 (LOW) (I)
M1 (LOW) (I)
M1 (HIGH) (I)
M1 (LOW) (I)
16
31
25
31
J2
52
49
B13
36
40
B14
45
48
RDATA
M0 (LOW) (I)
M0 (HIGH) (I)
M0 (LOW) (I)
M0 (LOW) (I)
17
32
26
32
L1
54
51
A14
38
42
B15
47
50
RTRIG (I)
M2 (HIGH) (I)
M2 (LOW) (I)
M2 (HIGH) (I)
M2 (HIGH) (I)
M2 (HIGH) (I)
18
33
27
33
K2
56
53
C13
40
44
C15
49
56
I/O
HDC (HIGH)
HDC (HIGH)
HDC (HIGH)
HDC (HIGH)
HDC (HIGH)
19
34
28
34
K3
57
54
B14
41
45
E14
50
57
I/O
LDC (LOW)
LDC (LOW)
LDC (LOW)
LDC (LOW)
LDC (LOW)
20
36
30
36
L3
59
56
D14
45
49
D16
54
61
I/O
INIT*
INIT*
INIT*
INIT*
INIT*
22
40
34
42
K6
65
62
G14
53
59
H15
65
77
I/O
GND
GND
GND
GND
GND
B2
29
26
A1
1
159
B2
1
3
User
Function
POWER
DWN
(1)
23
41
35
43
J6
66
63
H12
55
61
J14
67
79
GND
26
47
43
53
L11
76
73
M13
69
76
P15
85
100
XTL2 OR I/O
RESET (I)
RESET (I)
RESET (I)
RESET (I)
RESET (I)
27
48
44
54
K10
78
75
P14
71
78
R15
87
102
RESET (I)
DONE
DONE
DONE
DONE
DONE
28
49
45
55
J10
80
77
N13
73
80
R14
89
107
PROGRAM (I)
DATA 7 (I)
DATA 7 (I)
DATA 7 (I)
50
46
56
K11
81
78
M12
74
81
N13
90
109
I/O
30
51
47
57
J11
82
79
P13
75
82
T14
91
110
XTL1 OR I/O
DATA 6 (I)
DATA 6 (I)
DATA 6 (I)
52
48
58
H10
83
80
N11
78
86
P12
96
115
I/O
DATA 5 (I)
DATA 5 (I)
DATA 5 (I)
53
49
60
F10
87
84
M9
84
92
T11
102
122
I/O
54
50
61
G10
88
85
N9
85
93
R10
103
123
I/O
DATA 4 (I)
DATA 4 (I)
DATA 4 (I)
55
51
62
G11
89
86
N8
88
96
R9
108
128
I/O
DATA 3 (I)
DATA 3 (I)
DATA 3 (I)
57
53
65
F11
92
89
N7
92
102
P8
112
132
I/O
58
54
66
E11
93
90
P6
93
103
R8
113
133
I/O
CS0 (I)
CS1 (I)
DATA 2 (I)
DATA 2 (I)
DATA 2 (I)
59
55
67
E10
94
91
M6
96
106
R7
118
138
I/O
DATA 1 (I)
DATA 1 (I)
DATA 1 (I)
60
56
70
D10
98
95
M5
102
114
R5
124
145
I/O
I/O
RDY/BUSY
RCLK
RCLK
61
57
71
C11
99
96
N4
103
115
P5
125
146
DIN (I)
DIN (I)
DATA 0 (I)
DATA 0 (I)
DATA 0 (I)
38
62
58
72
B11
100
97
N2
106
119
R3
130
151
I/O
DOUT
DOUT
DOUT
DOUT
DOUT
39
63
59
73
C10
1
98
M3
107
120
N4
131
152
I/O
CCLK (I)
CCLK (O)
CCLK (O)
CCLK (O)
CCLK (O)
40
64
60
74
A11
2
99
P1
108
121
R2
132
153
CCLK (I)
WS (I)
A0
A0
1
61
75
B10
5
2
M2
111
124
P2
135
161
I/O
CS2 (I)
A1
A1
2
62
76
B9
6
3
N1
112
125
M3
136
162
I/O
A2
A2
3
63
77
A10
8
5
L2
115
128
P1
140
165
I/O
A3
A3
4
64
78
A9
9
6
L1
116
129
N1
141
166
I/O
A15
A15
65
81
B6
12
9
K1
119
132
M1
146
172
5
A4
A4
66
82
B7
13
10
J2
120
133
L2
147
173
I/O
A14
A14
6
67
83
A7
14
11
H1
123
136
K2
150
178
I/O
A5
A5
7
68
84
C7
15
12
H2
124
137
K1
151
179
I/O
A13
A13
9
2
2
A6
17
14
G2
128
141
H2
156
184
I/O
A6
A6
10
3
3
A5
18
15
G1
129
142
H1
157
185
I/O
A12
A12
11
4
4
B5
19
16
F2
133
147
F2
164
192
I/O
A7
A7
12
5
5
C5
20
17
E1
134
148
E1
165
193
I/O
A11
A11
13
6
8
A3
23
20
D1
137
151
D1
169
199
I/O
A8
A8
14
7
9
A2
24
21
D2
138
152
C1
170
200
I/O
A10
A10
15
8
10
B3
25
22
B1
141
155
E3
173
203
I/O
A9
A9
16
9
11
A1
26
26
C2
142
156
C2
174
204
5
I/O
All Others
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X**
X**
Notes:
*
(I)
**
***
****
Note:
7-40
X**
XC3x20A etc.
XC3x30A etc.
X
X
X
X
X
XC3x42A etc.
XC3x64A etc.
X
X
X
X
X
X
XC3x90A etc.
X
XC3195A
Generic I/O pins are not shown.
For a detailed description of the configuration modes, see page 25 through page 34.
For pinout details, see page 65 through page 76.
Represents a weak pull-up before and during configuration.
INIT is an open drain output during configuration.
Represents an input.
Pin assignment for the XC3064A/XC3090A and XC3195A differ from those shown.
Peripheral mode and master parallel mode are not supported in the PC44 package.
Pin assignments for the XC3195A PQ208 differ from those shown.
Pin assignments of PGA Footprint PLCC sockets and PGA packages are not identical.
The information on this page is provided as a convenient summary. For detailed pin descriptions, see the preceding two pages.
Before and during configuration, all outputs that are not used for the configuration process are 3-stated with a weak pull-up resistor.
November 9, 1998 (Version 3.1)
R
XC3000 Series Field Programmable Gate Arrays
XC3000A Switching Characteristics
Xilinx maintains test specifications for each product as controlled documents. To insure the use of the most recently released
device performance parameters, please request a copy of the current test-specification revision.
XC3000A Operating Conditions
Symbol
VCC
VIHT
VILT
VIHC
VILC
TIN
Description
Supply voltage relative to GND Commercial 0°C to +85°C junction
Supply voltage relative to GND Industrial -40°C to +100°C junction
High-level input voltage — TTL configuration
Low-level input voltage — TTL configuration
High-level input voltage — CMOS configuration
Low-level input voltage — CMOS configuration
Input signal transition time
Min
4.75
4.5
2.0
0
70%
0
Max
5.25
5.5
VCC
0.8
100%
20%
250
Units
V
V
V
V
VCC
VCC
ns
At junction temperatures above those listed as Operating Conditions, all delay parameters increase by 0.3% per °C.
Note:
XC3000A DC Characteristics Over Operating Conditions
Symbol
VOH
VOL
VOH
VOL
VCCPD
ICCPD
ICCO
IIL
CIN
IRIN
IRLL
Description
High-level output voltage (@ IOH = –4.0 mA, VCC min)
Low-level output voltage (@ IOL = 4.0 mA, VCC min)
High-level output voltage (@ IOH = –4.0 mA, VCC min)
Low-level output voltage (@ IOL = 4.0 mA, VCC min)
Power-down supply voltage (PWRDWN must be Low)
Power-down supply current
(VCC(MAX) @ TMAX)
Quiescent FPGA supply current in addition to ICCPD
Chip thresholds programmed as CMOS levels
Chip thresholds programmed as TTL levels
Input Leakage Current
Input capacitance, all packages except PGA175
(sample tested)
All Pins except XTL1 and XTL2
XTL1 and XTL2
Input capacitance, PGA 175
(sample tested)
All Pins except XTL1 and XTL2
XTL1 and XTL2
Pad pull-up (when selected) @ VIN = 0 V3
Horizontal Longline pull-up (when selected) @ logic Low
Commercial
Industrial
Min
3.86
Max
0.40
3.76
0.40
2.30
3020A
3030A
3042A
3064A
3090A
–10
0.02
Units
V
V
V
V
V
100
160
240
340
500
µA
µA
µA
µA
µA
500
10
+10
µA
µA
µA
10
15
pF
pF
16
20
0.17
3.4
pF
pF
mA
mA
Notes: 1. With no output current loads, no active input or Longline pull-up resistors, all package pins at VCC or GND, and the FPGA
device configured with a tie option.
2. Total continuous output sink current may not exceed 100 mA per ground pin. Total continuous output source may not exceed
100 mA per VCC pin. The number of ground pins varies from the XC3020A to the XC3090A.
3. Not tested. Allow an undriven pin to float High. For any other purposes use an external pull-up.
November 9, 1998 (Version 3.1)
7-41
7
R
XC3000 Series Field Programmable Gate Arrays
XC3000A Absolute Maximum Ratings
Symbol
VCC
VIN
VTS
TSTG
TSOL
TJ
Note:
Description
Supply voltage relative to GND
Input voltage with respect to GND
Voltage applied to 3-state output
Storage temperature (ambient)
Maximum soldering temperature (10 s @ 1/16 in.)
Junction temperature plastic
Junction temperature ceramic
–0.5 to +7.0
–0.5 to VCC +0.5
–0.5 to VCC +0.5
–65 to +150
+260
+125
+150
Units
V
V
V
°C
°C
°C
°C
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are
stress ratings only, and functional operation of the device at these or any other conditions beyond those listed under
Recommended Operating Conditions is not implied. Exposure to Absolute Maximum Ratings conditions for extended
periods of time may affect device reliability.
XC3000A Global Buffer Switching Characteristics Guidelines
Description
Global and Alternate Clock Distribution1
Either: Normal IOB input pad through clock buffer
to any CLB or IOB clock input
Or: Fast (CMOS only) input pad through clock
buffer to any CLB or IOB clock input
TBUF driving a Horizontal Longline (L.L.)1
I to L.L. while T is Low (buffer active)
T↓ to L.L. active and valid with single pull-up resistor
T↓ to L.L. active and valid with pair of pull-up resistors
T↑ to L.L. High with single pull-up resistor
T↑ to L.L. High with pair of pull-up resistors
BIDI
Bidirectional buffer delay
Speed Grade
Symbol
-7
Max
-6
Max
Units
TPID
7.5
7.0
ns
TPIDC
6.0
5.7
ns
TIO
TON
TON
TPUS
TPUF
4.5
9.0
11.0
16.0
10.0
4.0
8.0
10.0
14.0
8.0
ns
ns
ns
ns
ns
TBIDI
1.7
1.5
ns
Note: 1. Timing is based on the XC3042A, for other devices see timing calculator.
7-42
November 9, 1998 (Version 3.1)
R
XC3000 Series Field Programmable Gate Arrays
XC3000A CLB Switching Characteristics Guidelines
Testing of the switching parameters is modeled after testing methods specified by MIL-M-38510/605. All devices are 100%
functionally tested. Since many internal timing parameters cannot be measured directly, they are derived from benchmark
timing patterns. The following guidelines reflect worst-case values over the recommended operating conditions. For more
detailed, more precise, and more up-to-date timing information, use the values provided by the timing calculator and used
in the simulator.
Speed Grade
Symbol
Description
Combinatorial Delay
Logic Variables
A, B, C, D, E, to outputs X or Y
FG Mode
F and FGM Mode
Sequential delay
Clock k to outputs X or Y
Clock k to outputs X or Y when Q is returned
through function generators F or G to drive X or Y
FG Mode
F and FGM Mode
Set-up time before clock K
Logic Variables
A, B, C, D, E
FG Mode
F and FGM Mode
Data In
DI
Enable Clock
EC
Hold Time after clock K
Logic Variables
A, B, C, D, E
Data In
DI2
Enable Clock
EC
Clock
Clock High time
Clock Low time
Max. flip-flop toggle rate
Reset Direct (RD)
RD width
delay from RD to outputs X or Y
Global Reset (RESET Pad)1
RESET width (Low)
delay from RESET pad to outputs X or Y
-7
Min
-6
Max
Min
Max
Units
1
TILO
5.1
5.6
4.1
4.6
ns
ns
8
TCKO
4.5
4.0
ns
TQLO
9.5
10.0
8.0
8.5
ns
ns
TDICK
TECCK
4.5
5.0
4.0
4.5
3.5
4.0
3.0
4.0
ns
ns
ns
ns
3
5
7
TCKI
TCKDI
TCKEC
0
1.0
2.0
0
1.0
2.0
ns
ns
ns
11
12
TCH
TCL
FCLK
4.0
4.0
113.0
3.5
3.5
135.0
ns
ns
MHz
13
9
TRPW
TRIO
6.0
TMRW
TMRQ
16.0
2
TICK
4
6
7
5.0
6.0
5.0
ns
ns
17.0
ns
ns
14.0
19.0
Notes: 1. Timing is based on the XC3042A, for other devices see timing calculator.
2. The CLB K to Q output delay (TCKO, #8) of any CLB, plus the shortest possible interconnect delay, is always longer than the
Data In hold time requirement (TCKDI, #5) of any CLB on the same die.
November 9, 1998 (Version 3.1)
7-43
R
XC3000 Series Field Programmable Gate Arrays
XC3000A CLB Switching Characteristics Guidelines (continued)
CLB Output (X, Y)
(Combinatorial)
T ILO
1
CLB Input (A,B,C,D,E)
2
T ICK
3
T CKI
CLB Clock
12 TCL
11 T CH
4
TDICK
5
TCKDI
6
T ECCK
7
TCKEC
CLB Input
(Direct In)
CLB Input
(Enable Clock)
8
TCKO
CLB Output
(Flip-Flop)
CLB Input
(Reset Direct)
13 TRPW
9 T RIO
T
CLB Output
(Flip-Flop)
X5424
7-44
November 9, 1998 (Version 3.1)
R
XC3000 Series Field Programmable Gate Arrays
XC3000A IOB Switching Characteristics Guidelines
Testing of the switching parameters is modeled after testing methods specified by MIL-M-38510/605. All devices are 100%
functionally tested. Since many internal timing parameters cannot be measured directly, they are derived from benchmark
timing patterns. The following guidelines reflect worst-case values over the recommended operating conditions. For more
detailed, more precise, and more up-to-date timing information, use the values provided by the timing calculator and used
in the simulator.
Description
Propagation Delays (Input)
Pad to Direct In (I)
Pad to Registered In (Q) with latch transparent
Clock (IK) to Registered In (Q)
Set-up Time (Input)
Pad to Clock (IK) set-up time
Propagation Delays (Output)
Clock (OK) to Pad
(fast)
same
(slew rate limited)
Output (O) to Pad
(fast)
same
(slew-rate limited)
3-state to Pad begin hi-Z
(fast)
same
(slew-rate limited)
3-state to Pad active and valid (fast)
same
(slew -rate limited)
Set-up and Hold Times (Output)
Output (O) to clock (OK) set-up time
Output (O) to clock (OK) hold time
Clock
Clock High time
Clock Low time
Max. flip-flop toggle rate
Global Reset Delays (based on XC3042A)
RESET Pad to Registered In
(Q)
(fast)
RESET Pad to output pad
(slew-rate limited)
Speed Grade
Symbol
3
-7
Min
-6
Max
Min
4.0
15.0
3.0
Max
Units
3.0
14.0
2.5
ns
ns
ns
4
TPID
TPTG
TIKRI
1
TPICK
7
7
10
10
9
9
8
8
TOKPO
TOKPO
TOPF
TOPS
TTSHZ
TTSHZ
TTSON
TTSON
5
6
TOOK
TOKO
8.0
0
7.0
0
ns
ns
11
12
TIOH
TIOL
FCLK
4.0
4.0
113.0
3.5
3.5
135.0
ns
ns
MHz
13
15
15
TRRI
TRPO
TRPO
14.0
12.0
ns
ns
ns
ns
ns
ns
ns
ns
7.0
15.0
5.0
13.0
9.0
12.0
10.0
18.0
8.0
18.0
6.0
16.0
10.0
20.0
11.0
21.0
24.0
33.0
43.0
ns
23.0
29.0
37.0
ns
ns
ns
Notes: 1. Timing is measured at pin threshold, with 50 pF external capacitive loads (incl. test fixture). Typical slew rate limited output
rise/fall times are approximately four times longer.
2. Voltage levels of unused (bonded and unbonded) pads must be valid logic levels. Each can be configured with the internal
pull-up resistor or alternatively configured as a driven output or driven from an external source.
3. Input pad set-up time is specified with respect to the internal clock (ik). In order to calculate system set-up time, subtract
clock delay (pad to ik) from the input pad set-up time value. Input pad holdtime with respect to the internal clock (ik) is
negative. This means that pad level changes immediately before the internal clock edge (ik) will not be recognized.
4. TPID, TPTG, and TPICK are 3 ns higher for XTL2 when the pin is configured as a user input.
November 9, 1998 (Version 3.1)
7-45
7
R
XC3000 Series Field Programmable Gate Arrays
XC3000A IOB Switching Characteristics Guidelines (continued)
I/O Block (I)
3
T PID
I/O Pad Input
T PICK
1
I/O Clock (IK/OK)
12 TIOL
11 TIOH
I/O Block (RI)
4
TIKRI
13 TRRI
RESET
5
TOOK
6
TOKO
15 TRPO
I/O Block (O)
10 TOP
I/O Pad Output
(Direct)
7
TOKPO
I/O Pad Output
(Registered)
I/O Pad TS
8
9
TTSON
T TSHZ
I/O Pad Output
X5425
Vcc
PROGRAM-CONTROLLED MEMORY CELLS
OUT
INVERT
3- STATE
(OUTPUT ENABLE)
OUT
OUTPUT
SELECT
3-STATE
INVERT
SLEW
RATE
PASSIVE
PULL UP
T
O
D
Q
FLIP
FLOP
OUTPUT
BUFFER
I/O PAD
R
DIRECT IN
REGISTERED IN
I
Q
Q D
FLIP
FLOP
or
LATCH
TTL or
CMOS
INPUT
THRESHOLD
R
OK
IK
(GLOBAL RESET)
CK1
CK2
PROGRAM
CONTROLLED
MULTIPLEXER
7-46
= PROGRAMMABLE INTERCONNECTION POINT or PIP
X3029
November 9, 1998 (Version 3.1)
R
XC3000 Series Field Programmable Gate Arrays
XC3000L Switching Characteristics
Xilinx maintains test specifications for each product as controlled documents. To insure the use of the most recently released
device performance parameters, please request a copy of the current test-specification revision.
XC3000L Operating Conditions
Symbol
VCC
VIH
VIL
TIN
Description
Supply voltage relative to GND Commercial 0°C to +85°C junction
High-level input voltage — TTL configuration
Low-level input voltage — TTL configuration
Input signal transition time
Min
3.0
2.0
-0.3
Max
3.6
VCC+0.3
0.8
250
Units
V
V
V
ns
Notes: 1. At junction temperatures above those listed as Operating Conditions, all delay parameters increase by 0.3% per °C.
2. Although the present (1996) devices operate over the full supply voltage range from 3.0 to 5.25 V, Xilinx reserves the right to
restrict operation to the 3.0 to 3.6 V range later, when smaller device geometries might preclude operation at 5V. Operating
conditions are guaranteed in the 3.0 – 3.6 V VCC range.
XC3000L DC Characteristics Over Operating Conditions
Symbol
VOH
VOL
VOH
VOL
VCCPD
ICCPD
ICCO
IIL
CIN
IRIN
IRLL
Description
High-level output voltage (@ IOH = –4.0 mA, VCC min)
Low-level output voltage (@ IOL = 4.0 mA, VCC min)
High-level output voltage (@ IOH = –4.0 mA, VCC min)
Low-level output voltage (@ IOL = 4.0 mA, VCC min)
Power-down supply voltage (PWRDWN must be Low)
Power-down supply current (VCC(MAX) @ TMAX)
Quiescent FPGA supply current in addition to ICCPD1
Chip thresholds programmed as CMOS levels
Input Leakage Current
Input capacitance, all packages except PGA175
(sample tested)
All Pins except XTL1 and XTL2
XTL1 and XTL2
Input capacitance, PGA 175
(sample tested)
All Pins except XTL1 and XTL2
XTL1 and XTL2
Pad pull-up (when selected) @ VIN = 0 V3
Horizontal Longline pull-up (when selected) @ logic Low
Min
2.40
Max
10
Units
V
V
V
V
V
µA
20
+10
µA
µA
10
15
pF
pF
15
20
0.17
2.50
pF
pF
mA
mA
0.40
VCC -0.2
0.2
2.30
–10
0.01
Notes: 1. With no output current loads, no active input or Longline pull-up resistors, all package pins at VCC or GND, and the FPGA
device configured with a tie option. ICCO is in addition to ICCPD.
2. Total continuous output sink current may not exceed 100 mA per ground pin. Total continuous output source may not exceed
100 mA per VCC pin. The number of ground pins varies from the XC3020L to the XC3090L.
3. Not tested. Allows an undriven pin to float High. For any other purpose, use an external pull-up.
November 9, 1998 (Version 3.1)
7-47
7
R
XC3000 Series Field Programmable Gate Arrays
XC3000L Absolute Maximum Ratings
Symbol
VCC
VIN
VTS
TSTG
TSOL
TJ
Note:
Description
Supply voltage relative to GND
Input voltage with respect to GND
Voltage applied to 3-state output
Storage temperature (ambient)
Maximum soldering temperature (10 s @ 1/16 in.)
Junction temperature plastic
Junction temperature ceramic
–0.5 to +7.0
–0.5 to VCC +0.5
–0.5 to VCC +0.5
–65 to +150
+260
+125
+150
Units
V
V
V
°C
°C
°C
°C
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are
stress ratings only, and functional operation of the device at these or any other conditions beyond those listed under
Recommended Operating Conditions is not implied. Exposure to Absolute Maximum Ratings conditions for extended
periods of time may affect device reliability.
XC3000L Global Buffer Switching Characteristics Guidelines
Description
Global and Alternate Clock Distribution1
Either: Normal IOB input pad through clock buffer
to any CLB or IOB clock input
Or: Fast (CMOS only) input pad through clock
buffer to any CLB or IOB clock input
TBUF driving a Horizontal Longline (L.L.)1
I to L.L. while T is Low (buffer active)
T↓ to L.L. active and valid with single pull-up resistor
T↑ to L.L. High with single pull-up resistor
BIDI
Bidirectional buffer delay
Speed Grade
Symbol
-8
Max
Units
TPID
9.0
ns
TPIDC
7.0
ns
TIO
TON
TPUS
5.0
12.0
24.0
ns
ns
ns
TBIDI
2.0
ns
Notes: 1. Timing is based on the XC3042A, for other devices see timing calculator.
2. The use of two pull-up resistors per Longline, available on other XC3000 devices, is not a valid option for XC3000L devices.
7-48
November 9, 1998 (Version 3.1)
R
XC3000 Series Field Programmable Gate Arrays
XC3000L CLB Switching Characteristics Guidelines
Testing of the switching parameters is modeled after testing methods specified by MIL-M-38510/605. All devices are 100%
functionally tested. Since many internal timing parameters cannot be measured directly, they are derived from benchmark
timing patterns. The following guidelines reflect worst-case values over the recommended operating conditions. For more
detailed, more precise, and more up-to-date timing information, use the values provided by the timing calculator and used
in the simulator.
Speed Grade
Symbol
Description
Combinatorial Delay
Logic Variables
A, B, C, D, E, to outputs X or Y
FG Mode
F and FGM Mode
Sequential delay
Clock k to outputs X or Y
Clock k to outputs X or Y when Q is returned
through function generators F or G to drive X or Y
FG Mode
F and FGM Mode
Set-up time before clock K
Logic Variables
A, B, C, D, E
FG Mode
F and FGM Mode
Data In
DI
Enable Clock
EC
Hold Time after clock K
Logic Variables
A, B, C, D, E
Data In
DI2
Enable Clock
EC
Clock
Clock High time
Clock Low time
Max. flip-flop toggle rate
Reset Direct (RD)
RD width
delay from RD to outputs X or Y
Global Reset (RESET Pad)1
RESET width (Low)
delay from RESET pad to outputs X or Y
-8
Min
Max
Units
1
TILO
6.7
7.5
ns
ns
8
TCKO
7.5
ns
TQLO
14.0
14.8
ns
ns
TDICK
TECCK
5.0
5.8
5.0
6.0
ns
ns
ns
ns
3
5
7
TCKI
TCKDI
TCKEC
0
2.0
2.0
ns
ns
ns
11
12
TCH
TCL
FCLK
5.0
5.0
80.0
ns
ns
MHz
13
9
TRPW
TRIO
7.0
7.0
ns
ns
TMRW
TMRQ
16.0
2
TICK
4
6
7
23.0
ns
ns
Notes: 1. Timing is based on the XC3042L, for other devices see timing calculator.
2. The CLB K to Q output delay (TCKO, #8) of any CLB, plus the shortest possible interconnect delay, is always longer than the
Data In hold time requirement (TCKDI, #5) of any CLB on the same die.
November 9, 1998 (Version 3.1)
7-49
R
XC3000 Series Field Programmable Gate Arrays
XC3000L CLB Switching Characteristics Guidelines (continued)
CLB Output (X, Y)
(Combinatorial)
T ILO
1
CLB Input (A,B,C,D,E)
2
T ICK
3
T CKI
CLB Clock
12 TCL
11 T CH
4
TDICK
5
TCKDI
6
T ECCK
7
TCKEC
CLB Input
(Direct In)
CLB Input
(Enable Clock)
8
TCKO
CLB Output
(Flip-Flop)
CLB Input
(Reset Direct)
13 TRPW
9 T RIO
T
CLB Output
(Flip-Flop)
X5424
7-50
November 9, 1998 (Version 3.1)
R
XC3000 Series Field Programmable Gate Arrays
XC3000L IOB Switching Characteristics Guidelines
Testing of the switching parameters is modeled after testing methods specified by MIL-M-38510/605. All devices are 100%
functionally tested. Since many internal timing parameters cannot be measured directly, they are derived from benchmark
timing patterns. The following guidelines reflect worst-case values over the recommended operating conditions. For more
detailed, more precise, and more up-to-date timing information, use the values provided by the timing calculator and used
in the simulator.
Speed Grade
Symbol
Description
Propagation Delays (Input)
Pad to Direct In (I)
Pad to Registered In (Q) with latch transparent
Clock (IK) to Registered In (Q)
Set-up Time (Input)
Pad to Clock (IK) set-up time
Propagation Delays (Output)
Clock (OK) to Pad
(fast)
same
(slew rate limited)
Output (O) to Pad
(fast)
same
(slew-rate limited)
3-state to Pad begin hi-Z
(fast)
same
(slew-rate limited)
3-state to Pad active and valid (fast)
same
(slew -rate limited)
Set-up and Hold Times (Output)
Output (O) to clock (OK) set-up time
Output (O) to clock (OK) hold time
Clock
Clock High time
Clock Low time
Max. flip-flop toggle rate
Global Reset Delays (based on XC3042L)
(Q)
RESET Pad to Registered In
(fast)
RESET Pad to output pad
(slew-rate limited)
3
-8
Min
Max
Units
5.0
24.0
6.0
ns
ns
ns
4
TPID
TPTG
TIKRI
1
TPICK
7
7
10
10
9
9
8
8
TOKPO
TOKPO
TOPF
TOPS
TTSHZ
TTSHZ
TTSON
TTSON
5
6
TOOK
TOKO
12.0
0
ns
ns
11
12
TIOH
TIOL
FCLK
5.0
5.0
80.0
ns
ns
MHz
13
15
15
TRRI
TRPO
TRPO
22.0
ns
ns
ns
ns
ns
ns
ns
ns
ns
12.0
28.0
9.0
25.0
12.0
28.0
16.0
32.0
25.0
35.0
51.0
ns
ns
ns
Notes: 1. Timing is measured at pin threshold, with 50 pF external capacitive loads (incl. test fixture). Typical slew rate limited output
rise/fall times are approximately four times longer.
2. Voltage levels of unused (bonded and unbonded) pads must be valid logic levels. Each can be configured with the internal
pull-up resistor or alternatively configured as a driven output or driven from an external source.
3. Input pad set-up time is specified with respect to the internal clock (ik). In order to calculate system set-up time, subtract
clock delay (pad to ik) from the input pad set-up time value. Input pad holdtime with respect to the internal clock (ik) is
negative. This means that pad level changes immediately before the internal clock edge (ik) will not be recognized.
4. TPID, TPTG, and TPICK are 3 ns higher for XTL2 when the pin is configured as a user input.
November 9, 1998 (Version 3.1)
7-51
7
R
XC3000 Series Field Programmable Gate Arrays
XC3000L IOB Switching Characteristics Guidelines (continued)
I/O Block (I)
3
T PID
I/O Pad Input
T PICK
1
I/O Clock (IK/OK)
12 TIOL
11 TIOH
I/O Block (RI)
4
TIKRI
13 TRRI
RESET
5
TOOK
6
TOKO
15 TRPO
I/O Block (O)
10 TOP
I/O Pad Output
(Direct)
7
TOKPO
I/O Pad Output
(Registered)
I/O Pad TS
8
9
TTSON
T TSHZ
I/O Pad Output
X5425
Vcc
PROGRAM-CONTROLLED MEMORY CELLS
OUT
INVERT
3- STATE
(OUTPUT ENABLE)
OUT
OUTPUT
SELECT
3-STATE
INVERT
SLEW
RATE
PASSIVE
PULL UP
T
O
D
Q
FLIP
FLOP
OUTPUT
BUFFER
I/O PAD
R
DIRECT IN
REGISTERED IN
I
Q
Q D
FLIP
FLOP
or
LATCH
TTL or
CMOS
INPUT
THRESHOLD
R
OK
IK
(GLOBAL RESET)
CK1
CK2
PROGRAM
CONTROLLED
MULTIPLEXER
7-52
= PROGRAMMABLE INTERCONNECTION POINT or PIP
X3029
November 9, 1998 (Version 3.1)
R
XC3000 Series Field Programmable Gate Arrays
XC3100A Switching Characteristics
Xilinx maintains test specifications for each product as controlled documents. To insure the use of the most recently released
device performance parameters, please request a copy of the current test-specification revision.
XC3100A Operating Conditions
Symbol
VCC
VIHT
VILT
VIHC
VILC
TIN
Description
Supply voltage relative to GND Commercial 0°C to +85°C junction
Supply voltage relative to GND Industrial -40°C to +100°C junction
High-level input voltage — TTL configuration
Low-level input voltage — TTL configuration
High-level input voltage — CMOS configuration
Low-level input voltage — CMOS configuration
Input signal transition time
Min
4.25
4.5
2.0
0
70%
0
Max
5.25
5.5
VCC
0.8
100%
20%
250
Units
V
V
V
V
VCC
VCC
ns
At junction temperatures above those listed as Operating Conditions, all delay parameters increase by 0.3% per °C.
Note:
XC3100A DC Characteristics Over Operating Conditions
Symbol
VOH
VOL
VOH
VOL
VCCPD
ICCO
IIL
CIN
IRIN
IRLL
Description
High-level output voltage (@ IOH = –8.0 mA, VCC min)
Low-level output voltage (@ IOL = 8.0 mA, VCC min)
High-level output voltage (@ IOH = –8.0 mA, VCC min)
Low-level output voltage (@ IOL = 8.0 mA, VCC min)
Power-down supply voltage (PWRDWN must be Low)
Quiescent LCA supply current in addition to ICCPD1
Chip thresholds programmed as CMOS levels
Chip thresholds programmed as TTL levels
Input Leakage Current
Input capacitance, all packages except PGA175
(sample tested)
All Pins except XTL1 and XTL2
XTL1 and XTL2
Input capacitance, PGA 175
(sample tested)
All Pins except XTL1 and XTL2
XTL1 and XTL2
Pad pull-up (when selected) @ VIN = 0 V3
Horizontal Longline pull-up (when selected) @ logic Low
Commercial
Industrial
Min
3.86
Max
0.40
3.76
0.40
2.30
–10
0.02
0.20
Units
V
V
V
V
V
8
14
+10
mA
mA
µA
10
15
pF
pF
15
20
0.17
2.80
pF
pF
mA
mA
Notes: 1. With no output current loads, no active input or Longline pull-up resistors, all package pins at VCC or GND, and the LCA
device configured with a tie option.
2. Total continuous output sink current may not exceed 100 mA per ground pin. The number of ground pins varies from two for
the XC3120A in the PC84 package, to eight for the XC3195A in the PQ208 package.
3. Not tested. Allows an undriven pin to float High. For any other purpose, use an external pull-up.
November 9, 1998 (Version 3.1)
7-53
7
R
XC3000 Series Field Programmable Gate Arrays
XC3100A Absolute Maximum Ratings
Symbol
VCC
VIN
VTS
TSTG
TSOL
TJ
Note:
Description
Supply voltage relative to GND
Input voltage with respect to GND
Voltage applied to 3-state output
Storage temperature (ambient)
Maximum soldering temperature (10 s @ 1/16 in.)
Junction temperature plastic
Junction temperature ceramic
Units
V
V
V
°C
°C
°C
°C
–0.5 to +7.0
–0.5 to VCC +0.5
–0.5 to VCC +0.5
–65 to +150
+260
+125
+150
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are
stress ratings only, and functional operation of the device at these or any other conditions beyond those listed under
Recommended Operating Conditions is not implied. Exposure to Absolute Maximum Ratings conditions for extended
periods of time may affect device reliability.
XC3100A Global Buffer Switching Characteristics Guidelines
Description
Global and Alternate Clock Distribution1
Either: Normal IOB input pad through clock buffer
to any CLB or IOB clock input
Or: Fast (CMOS only) input pad through clock
buffer to any CLB or IOB clock input
TBUF driving a Horizontal Longline (L.L.)1
I to L.L. while T is Low (buffer active)
(XC3100)
(XC3100A)
T↓ to L.L. active and valid with single pull-up resistor
T↓ to L.L. active and valid with pair of pull-up resistors
T↑ to L.L. High with single pull-up resistor
T↑ to L.L. High with pair of pull-up resistors
BIDI
Bidirectional buffer delay
Speed Grade -4
Symbol Max
-3
Max
-2
Max
-1
Max
-09
Max
Units
TPID
6.5
5.6
4.7
4.3
3.9
ns
TPIDC
5.1
4.3
3.7
3.5
3.1
ns
TIO
TIO
TON
TON
TPUS
TPUF
3.7
3.6
5.0
6.5
13.5
10.5
3.1
3.1
4.2
5.7
11.4
8.8
3.1
4.2
5.7
11.4
8.1
2.9
4.0
5.5
10.4
7.1
2.1
3.1
4.6
8.9
5.9
ns
ns
ns
ns
ns
ns
TBIDI
1.2
1.0
0.9
0.85
0.75
ns
Prelim
Note:
7-54
1. Timing is based on the XC3142A, for other devices see timing calculator.
The use of two pull-up resistors per longline, available on other XC3000 devices, is not a valid design option for XC3100A
devices.
November 9, 1998 (Version 3.1)
R
XC3000 Series Field Programmable Gate Arrays
XC3100A CLB Switching Characteristics Guidelines
Testing of the switching parameters is modeled after testing methods specified by MIL-M-38510/605. All devices are 100%
functionally tested. Since many internal timing parameters cannot be measured directly, they are derived from benchmark
timing patterns. The following guidelines reflect worst-case values over the recommended operating conditions. For more
detailed, more precise, and more up-to-date timing information, use the values provided by the timing calculator and used
in the simulator.
Speed Grade
Description
Symbol
Combinatorial Delay
Logic Variables
A, B, C, D, E,
1 TILO
to outputs X or Y
Sequential delay
Clock k to outputs X or Y
8 TCKO
Clock k to outputs X or Y when Q is returned
through function generators F or G to drive
X or Y
TQLO
Set-up time before clock K
Logic Variables
A, B, C, D, E
Data In
DI
Enable Clock
EC
Reset Direct inactive RD
Hold Time after clock K
Logic Variables
A, B, C, D, E
Data In
DI
Enable Clock
EC
Clock
Clock High time
Clock Low time
Max. flip-flop toggle rate
Reset Direct (RD)
RD width
delay from RD to outputs X or Y
Global Reset (RESET Pad)1
RESET width (Low)
(XC3142A)
delay from RESET pad to outputs X or Y
-4
Min
-3
Max
Min
-2
Max
Min
-1
Max
Min
-09
Max
Min
Max
Units
3.3
2.7
2.2
1.75
1.5
ns
2.5
2.1
1.7
1.4
1.25
ns
5.2
4.3
3.5
3.1
2.7
ns
2 TICK
4 TDICK
6 TECCK
2.5
1.6
3.2
1.0
2.1
1.4
2.7
1.0
1.8
1.3
2.5
1.0
1.7
1.2
2.3
1.0
1.5
1.0
2.05
1.0
ns
ns
ns
ns
3 TCKI
5 TCKDI
7 TCKEC
0
1.0
0.8
0
0.9
0.7
0
0.9
0.7
0
0.8
0.6
0
0.7
0.55
ns
ns
ns
11
12
TCH
TCL
FCLK
2.0
2.0
227
1.6
1.6
270
1.3
1.3
323
1.3
1.3
323
1.3
1.3
370
ns
ns
MHz
13 TRPW
9 TRIO
3.2
TMRW
TMRQ
14.0
2.7
3.7
2.3
3.1
12.0
14.0
2.3
2.7
12.0
12.0
2.05
2.4
12.0
12.0
2.15
12.0
12.0
12.0
Prelim
ns
ns
ns
ns
Notes: 1. The CLB K to Q output delay (TCKO, #8) of any CLB, plus the shortest possible interconnect delay, is always longer than the
Data In hold time requirement (TCKDI, #5) of any CLB on the same die.
2. TILO, TQLO and TICK are specified for 4-input functions. For 5-input functions or base FGM functions, each of these
specifications for the XC3100A family increases by 0.50 ns (-5), 0.42 ns (-4) and 0.35 ns (-3), 0.35 ns (-2), 0.30 ns (-1), and
0.30 ns (-09).
November 9, 1998 (Version 3.1)
7-55
7
R
XC3000 Series Field Programmable Gate Arrays
XC3100A CLB Switching Characteristics Guidelines (continued)
CLB Output (X, Y)
(Combinatorial)
T ILO
1
CLB Input (A,B,C,D,E)
2
T ICK
3
T CKI
CLB Clock
12 TCL
11 T CH
4
TDICK
5
TCKDI
6
T ECCK
7
TCKEC
CLB Input
(Direct In)
CLB Input
(Enable Clock)
8
TCKO
CLB Output
(Flip-Flop)
CLB Input
(Reset Direct)
13 TRPW
9 T RIO
T
CLB Output
(Flip-Flop)
X5424
7-56
November 9, 1998 (Version 3.1)
R
XC3000 Series Field Programmable Gate Arrays
XC3100A IOB Switching Characteristics Guidelines
Testing of the switching parameters is modeled after testing methods specified by MIL-M-38510/605. All devices are 100%
functionally tested. Since many internal timing parameters cannot be measured directly, they are derived from benchmark
timing patterns. The following guidelines reflect worst-case values over the recommended operating conditions. For more
detailed, more precise, and more up-to-date timing information, use the values provided by the timing calculator and used
in the simulator.
Speed Grade
Description
Symbol
Propagation Delays (Input)
Pad to Direct In (I)
3 TPID
Pad to Registered In (Q)
TPTG
with latch transparent(XC3100A)Clock (IK)
to Registered In (Q)
4 TIKRI
Set-up Time (Input)
Pad to Clock (IK) set-up time
XC3120A, XC3130A
XC3142A
XC3164A
XC3190A
XC3195A
Propagation Delays (Output)
Clock (OK) to Pad (fast)
same
(slew rate limited)
Output (O) to Pad (fast)
same
(slew-rate limited)
(XC3100A)
3-state to Pad
begin hi-Z
(fast)
same
(slew-rate limited)
3-state to Pad
active and valid (fast) (XC3100A)
same
(slew -rate limited)
Set-up and Hold Times (Output)
Output (O) to clock (OK) set-up time
(XC3100A)
Output (O) to clock (OK) hold time
Clock
Clock High time
Clock Low time
Max. flip-flop toggle rate
Global Reset Delays
RESET Pad to Registered In
(Q)
(XC3142A)
(XC3190A)
RESET Pad to output pad
(fast)
(slew-rate limited)
1
TPICK
-4
Min
-3
Max
Min
-2
Max
Min
-1
Max
Min
-09
Max
Min
Max
Units
2.5
2.2
2.0
1.7
1.55
ns
12.0
2.5
11.0
2.2
11.0
1.9
10.0
1.7
9.2
1.55
ns
ns
10.6
10.7
11.0
11.2
11.6
9.4
9.5
9.7
9.9
10.3
8.9
9.0
9.2
9.4
9.8
8.0
8.1
8.3
8.5
8.9
7.2
7.3
7.5
7.7
8.1
ns
ns
ns
ns
ns
7 TOKPO
7 TOKPO
10 TOPF
5.0
12.0
3.7
4.4
10.0
3.3
3.7
9.7
3.0
3.4
8.4
3.0
3.3
6.9
2.9
10 TOPS
11.0
9.0
8.7
8.0
6.5
ns
ns
ns
ns
ns
9
9
TTSHZ
TTSHZ
6.2
6.2
5.5
5.5
5.0
5.0
4.5
4.5
4.05
4.05
ns
ns
8 TTSON
8 TTSON
10.0
17.0
9.0
15.0
8.5
14.2
6.5
11.5
5.0
8.6
ns
ns
5
6
TOOK
TOKO
4.5
0
11
12
TIOH
TIOL
FCLK
2.0
2.0
227
13
TRRI
15 TRPO
15 TRPO
1.6
1.6
270
15.0
25.5
20.0
27.0
13.0
21.0
17.0
23.0
3.6
0
3.2
0
2.9
ns
ns
1.3
1.3
323
1.3
1.3
323
1.3
1.3
370
ns
ns
MHz
13.0
21.0
17.0
23.0
13.0
21.0
17.0
22.0
14.4
21.0
17.0
21.0
ns
ns
ns
ns
Preliminary
Notes: 1. Timing is measured at pin threshold, with 50 pF external capacitive loads (incl. test fixture). For larger capacitive loads, see
XAPP024. Typical slew rate limited output rise/fall times are approximately four times longer.
2. Voltage levels of unused (bonded and unbonded) pads must be valid logic levels. Each can be configured with the internal
pull-up resistor or alternatively configured as a driven output or driven from an external source.
3. Input pad set-up time is specified with respect to the internal clock (ik). In order to calculate system set-up time, subtract
clock delay (pad to ik) from the input pad set-up time value. Input pad holdtime with respect to the internal clock (ik) is
negative. This means that pad level changes immediately before the internal clock edge (ik) will not be recognized.
4. TPID, TPTG, and TPICK are 3 ns higher for XTL2 when the pin is configured as a user input.
November 9, 1998 (Version 3.1)
7-57
7
R
XC3000 Series Field Programmable Gate Arrays
XC3100A IOB Switching Characteristics Guidelines (continued)
I/O Block (I)
3
T PID
I/O Pad Input
T PICK
1
I/O Clock (IK/OK)
12 TIOL
11 TIOH
I/O Block (RI)
4
TIKRI
13 TRRI
RESET
5
TOOK
6
TOKO
15 TRPO
I/O Block (O)
10 TOP
I/O Pad Output
(Direct)
7
TOKPO
I/O Pad Output
(Registered)
I/O Pad TS
8
9
TTSON
T TSHZ
I/O Pad Output
X5425
Vcc
PROGRAM-CONTROLLED MEMORY CELLS
OUT
INVERT
3- STATE
(OUTPUT ENABLE)
OUT
OUTPUT
SELECT
3-STATE
INVERT
SLEW
RATE
PASSIVE
PULL UP
T
O
D
Q
FLIP
FLOP
OUTPUT
BUFFER
I/O PAD
R
DIRECT IN
REGISTERED IN
I
Q
Q D
FLIP
FLOP
or
LATCH
TTL or
CMOS
INPUT
THRESHOLD
R
OK
IK
(GLOBAL RESET)
CK1
CK2
PROGRAM
CONTROLLED
MULTIPLEXER
7-58
= PROGRAMMABLE INTERCONNECTION POINT or PIP
X3029
November 9, 1998 (Version 3.1)
R
XC3000 Series Field Programmable Gate Arrays
XC3100L Switching Characteristics
Xilinx maintains test specifications for each product as controlled documents. To insure the use of the most recently released
device performance parameters, please request a copy of the current test-specification revision.
XC3100L Operating Conditions
Symbol
VCC
VIH
VIL
TIN
Description
Supply voltage relative to GND Commercial 0°C to +85°C junction
High-level input voltage
Low-level input voltage
Input signal transition time
Min
3.0
2.0
-0.3
Max
3.6
VCC + 0.3
0.8
250
Units
V
V
V
ns
Notes: 1. At junction temperatures above those listed as Operating Conditions, all delay parameters increase by 0.3% per °C.
2. Although the present (1996) devices operate over the full supply voltage range from 3.0 V to 5.25 V, Xilinx reserves the right
to restrict operation to the 3.0 and 3.6 V range later, when smaller device geometries might preclude operation @ 5 V.
Operating conditions are guaranteed in the 3.0 – 3.6 V VCC range.
XC3100L DC Characteristics Over Operating Conditions
Symbol
VOH
VOL
VCCPD
ICCO
IIL
CIN
IRIN
IRLL
Description
High-level output voltage (@ IOH = -4.0 mA, VCC min)
High-level output voltage (@ IOH = -100.0 µA, VCC min)
Low-level output voltage (@ IOH = 4.0 mA, VCC min)
Low-level output voltage (@ IOH = +100.0 µA, VCC min)
Power-down supply voltage (PWRDWN must be Low)
Quiescent FPGA supply current
Chip thresholds programmed as CMOS levels1
Input Leakage Current
Input capacitance
(sample tested)
All pins except XTL1 and XTL2
XTL1 and XTL2
Pad pull-up (when selected) @ VIN = 0 V 3
Horizontal long line pull-up (when selected) @ logic Low
Min
2.4
VCC -0.2
Max
1.5
Units
V
V
V
V
V
mA
-10
+10
µA
0.02
0.20
10
15
0.17
2.80
pF
pF
mA
mA
0.40
0.2
2.30
Notes: 1. With no output current loads, no active input or long line pull-up resistors, all package pins at VCC or GND, and the FPGA
configured with a tie option.
2. Total continuous output sink current may not exceed 100 mA per ground pin. Total continuous output source current may not
exceed 100 mA per VCC pin. The number of ground pins varies from the XC3142L to the XC3190L.
3. Not tested. Allows undriven pins to float High. For any other purpose, use an external pull-up.
November 9, 1998 (Version 3.1)
7-59
7
R
XC3000 Series Field Programmable Gate Arrays
XC3100L Absolute Maximum Ratings
Symbol
VCC
VIN
VTS
TSTG
TSOL
TJ
Note:
Description
Supply voltage relative to GND
Input voltage with respect to GND
Voltage applied to 3-state output
Storage temperature (ambient)
Maximum soldering temperature (10 s @ 1/16 in.)
Junction temperature plastic
Junction temperature ceramic
–0.5 to +7.0
–0.5 to VCC +0.5
–0.5 to VCC +0.5
–65 to +150
+260
+125
+150
Units
V
V
V
°C
°C
°C
°C
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are
stress ratings only, and functional operation of the device at these or any other conditions beyond those listed under
Recommended Operating Conditions is not implied. Exposure to Absolute Maximum Ratings conditions for extended
periods of time may affect device reliability.
XC3100L Global Buffer Switching Characteristics Guidelines
Description
Global and Alternate Clock Distribution1
Either:Normal IOB input pad through clock buffer
to any CLB or IOB clock input
Or: Fast (CMOS only) input pad through clock
buffer to any CLB or IOB clock input
TBUF driving a Horizontal Longline (L.L.)1
I to L.L. while T is Low (buffer active)
T↓ to L.L. active and valid with single pull-up resistor
T↑ to L.L. High with single pull-up resistor
BIDI
Bidirectional buffer delay
Speed Grade
Symbol
-3
Max
-2
Max
Units
TPID
5.6
4.7
ns
TPIDC
4.3
3.7
ns
TIO
TON
TPUS
3.1
4.2
11.4
3.1
4.2
11.4
ns
ns
ns
TBIDI
1.0
0.9
ns
Advance
Notes: 1. Timing is based on the XC3142L, for other devices see timing calculator.
2. The use of two pull-up resistors per longline, available on other XC3000 devices, is not a valid option for XC3100L devices.
7-60
November 9, 1998 (Version 3.1)
R
XC3000 Series Field Programmable Gate Arrays
XC3100L CLB Switching Characteristics Guidelines
Testing of the switching parameters is modeled after testing methods specified by MIL-M-38510/605. All devices are 100%
functionally tested. Since many internal timing parameters cannot be measured directly, they are derived from benchmark
timing patterns. The following guidelines reflect worst-case values over the recommended operating conditions. For more
detailed, more precise, and more up-to-date timing information, use the values provided by the timing calculator and used
in the simulator.
Speed Grade
Symbol
Description
Combinatorial Delay
Logic Variables A, B, C, D, E, to outputs X or Y
Sequential delay
Clock k to outputs X or Y
Clock k to outputs X or Y when Q is returned
through function generators F or G to drive X or Y
Set-up time before clock K
Logic Variables
A, B, C, D, E
Data In
DI
Enable Clock
EC
Reset Direct Inactive
RD
Hold Time after clock K
Logic Variables
A, B, C, D, E
Data In
DI
Enable Clock
EC
Clock
Clock High time
Clock Low time
Max. flip-flop toggle rate
Reset Direct (RD)
RD width
delay from RD to outputs X or Y
Global Reset (RESET Pad)
RESET width (Low)
(XC3142L)
delay from RESET pad to outputs X or Y
-3
Min
-2
Max
Min
Max
Units
1
TILO
2.7
2.2
ns
8
TCKO
2.1
1.7
ns
TQLO
4.3
3.5
ns
2
4
6
TICK
TDICK
TECCK
2.1
1.4
2.7
1.0
1.8
1.3
2.5
1.0
ns
ns
ns
ns
3
5
7
TCKI
TCKDI
TCKEC
0
0.9
0.7
0
0.9
0.7
ns
ns
ns
11
12
TCH
TCL
FCLK
1.6
1.6
270
1.3
1.3
325
ns
ns
MHz
13
9
TRPW
TRIO
2.7
TMRW
TMRQ
12.0
2.3
3.1
2.7
ns
ns
12.0
12.0
Advance
ns
ns
12.0
Notes: 1. The CLB K to Q delay (TCKO, #8) of any CLB, plus the shortest possible interconnect delay, is always longer than the Data
In hold time requirement (TCKDI, #5) of any CLB on the same die.
2. TILO, TQLO and TICK are specified for 4-input functions. For 5-input functions or base FGM functions, each of these
specifications for the XC3100L family increase by 0.35 ns (-3) and 0.29 ns (-2).
November 9, 1998 (Version 3.1)
7-61
7
R
XC3000 Series Field Programmable Gate Arrays
XC3100L CLB Switching Characteristics Guidelines (continued)
CLB Output (X, Y)
(Combinatorial)
T ILO
1
CLB Input (A,B,C,D,E)
2
T ICK
3
T CKI
CLB Clock
12 TCL
11 T CH
4
TDICK
5
TCKDI
6
T ECCK
7
TCKEC
CLB Input
(Direct In)
CLB Input
(Enable Clock)
8
TCKO
CLB Output
(Flip-Flop)
CLB Input
(Reset Direct)
13 TRPW
9 T RIO
T
CLB Output
(Flip-Flop)
X5424
7-62
November 9, 1998 (Version 3.1)
R
XC3000 Series Field Programmable Gate Arrays
XC3100L IOB Switching Characteristics Guidelines
Testing of the switching parameters is modeled after testing methods specified by MIL-M-38510/605. All devices are 100%
functionally tested. Since many internal timing parameters cannot be measured directly, they are derived from benchmark
timing patterns. The following guidelines reflect worst-case values over the recommended operating conditions. For more
detailed, more precise, and more up-to-date timing information, use the values provided by the timing calculator and used
in the simulator.
Description
Propagation Delays (Input)
Pad to Direct In (I)
Pad to Registered In (Q) with latch (XC3100L)
transparent
Clock (IK) to Registered In (Q)
Set-up Time (Input)
Pad to Clock (IK) set-up time
XC3142L
XC3190L
Propagation Delays (Output)
Clock (OK) to Pad
(fast)
same
(slew rate limited)
Output (O) to Pad
(fast)
same
(slew-rate limited)(XC3100L)
3-state to Pad begin hi-Z
(fast)
same
(slew-rate limited)
3-state to Pad active and valid (fast)(XC3100L)
same
(slew -rate limited)
Set-up and Hold Times (Output)
Output (O) to clock (OK) set-up time (XC3100L)
Output (O) to clock (OK) hold time
Clock
Clock High time
Clock Low time
Export Control Maximum flip-flop toggle rate
Global Reset Delays
RESET Pad to Registered In (Q)
(XC3142L)
(XC3190L)
(fast)
RESET Pad to output pad
(slew-rate limited)
Speed Grade
Symbol
-3
Min
-2
Max
Min
Max
Units
3
TPID
TPTG
2.2
11.0
2.0
11.0
ns
ns
4
TIKRI
2.2
1.9
ns
1
TPICK
9.5
9.9
9.0
9.4
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
4.0
9.7
3.0
8.7
5.0
5.0
8.5
14.2
7
7
10
10
9
9
8
8
TOKPOTOK
5
6
TOOK
TOKO
4.0
0
3.6
0
ns
ns
11
12
TIOH
TIOL
FTOG
1.6
1.6
270
1.3
1.3
325
ns
ns
MHz
13
TRRI
15
15
TRPO
TRPO
4.4
10.0
3.3
9.0
5.5
5.5
9.0
15.0
PO
TOPF
TOPF
TTSHZ
TTSHZ
TTSON
TTSON
16.0
21.0
17.0
23.0
Advance
16.0
21.0
17.0
23.0
ns
ns
ns
ns
Notes: 1. Timing is measured at pin threshold, with 50 pF external capacitive loads (incl. test fixture). Typical slew rate limited output
rise/fall times are approximately four times longer.
2. Voltage levels of unused (bonded and unbonded) pads must be valid logic levels. Each can be configured with the internal
pull-up resistor or alternatively configured as a driven output or driven from an external source.
3. Input pad set-up time is specified with respect to the internal clock (IK). In order to calculate system set-up time, subtract
clock delay (pad to ik) from the input pad set-up time value. Input pad holdtime with respect to the internal clock (IK) is
negative. This means that pad level changes immediately before the internal clock edge (IK) will not be recognized.
November 9, 1998 (Version 3.1)
7-63
7
R
XC3000 Series Field Programmable Gate Arrays
XC3100L IOB Switching Characteristics Guidelines (continued)
I/O Block (I)
3
T PID
I/O Pad Input
T PICK
1
I/O Clock (IK/OK)
12 TIOL
11 TIOH
I/O Block (RI)
4
TIKRI
13 TRRI
RESET
5
TOOK
6
TOKO
15 TRPO
I/O Block (O)
10 TOP
I/O Pad Output
(Direct)
7
TOKPO
I/O Pad Output
(Registered)
I/O Pad TS
8
9
TTSON
T TSHZ
I/O Pad Output
X5425
Vcc
PROGRAM-CONTROLLED MEMORY CELLS
OUT
INVERT
3- STATE
(OUTPUT ENABLE)
OUT
OUTPUT
SELECT
3-STATE
INVERT
SLEW
RATE
PASSIVE
PULL UP
T
O
D
Q
FLIP
FLOP
OUTPUT
BUFFER
I/O PAD
R
DIRECT IN
REGISTERED IN
I
Q
Q D
FLIP
FLOP
or
LATCH
TTL or
CMOS
INPUT
THRESHOLD
R
OK
IK
(GLOBAL RESET)
CK1
CK2
PROGRAM
CONTROLLED
MULTIPLEXER
7-64
= PROGRAMMABLE INTERCONNECTION POINT or PIP
X3029
November 9, 1998 (Version 3.1)
R
XC3000 Series Field Programmable Gate Arrays
XC3000 Series Pin Assignments
Xilinx offers the six different array sizes in the XC3000 families in a variety of surface-mount and through-hole package
types, with pin counts from 44 to 208.
Each chip is offered in several package types to accommodate the available PC board space and manufacturing technology.
Most package types are also offered with different chips to accommodate design changes without the need for PC board
changes.
Note that there is no perfect match between the number of bonding pads on the chip and the number of pins on a package.
In some cases, the chip has more pads than there are pins on the package, as indicated by the information (“unused” pads)
below the line in the following table. The IOBs of the unconnected pads can still be used as storage elements if the specified
propagation delays and set-up times are acceptable.
In other cases, the chip has fewer pads than there are pins on the package; therefore, some package pins are not connected
(n.c.), as shown above the line in the following table.
XC3000 Series 44-Pin PLCC Pinouts
XC3000A, XC3000L, and XC3100A families have identical pinouts
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
XC3030A
GND
I/O
I/O
I/O
I/O
I/O
PWRDWN
TCLKIN-I/O
I/O
I/O
I/O
VCC
I/O
I/O
I/O
M1-RDATA
M0-RTRIG
M2-I/O
HDC-I/O
LDC-I/O
I/O
INIT-I/O
Pin No.
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
XC3030A
GND
I/O
I/O
XTL2(IN)-I/O
RESET
DONE-PGM
I/O
XTL1(OUT)-BCLK-I/O
I/O
I/O
I/O
VCC
I/O
I/O
I/O
DIN-I/O
DOUT-I/O
CCLK
I/O
I/O
I/O
I/O
7
Peripheral mode and Master Parallel mode are not supported in the PC44 package
November 9, 1998 (Version 3.1)
7-65
R
XC3000 Series Field Programmable Gate Arrays
XC3000 Series 64-Pin Plastic VQFP Pinouts
XC3000A, XC3000L, and XC3100A families have identical pinouts
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
7-66
XC3030A
A0-WS-I/O
A1-CS2-I/O
A2-I/O
A3-I/O
A4-I/O
A14-I/O
A5-I/O
GND
A13-I/O
A6-I/O
A12-I/O
A7-I/O
A11-I/O
A8-I/O
A10-I/O
A9-I/O
PWRDN
TCLKIN-I/O
I/O
I/O
I/O
I/O
I/O
VCC
I/O
I/O
I/O
I/O
I/O
I/O
M1-RDATA
M0-RTRIG
Pin No.
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
XC3030A
M2-I/O
HDC-I/O
I/O
LDC-I/O
I/O
I/O
I/O
INIT-I/O
GND
I/O
I/O
I/O
I/O
I/O
XTAL2(IN)-I/O
RESET
DONE-PG
D7-I/O
XTAL1(OUT)-BCLKIN-I/O
D6-I/O
D5-I/O
CS0-I/O
D4-I/O
VCC
D3-I/O
CS1-I/O
D2-I/O
D1-I/O
RDY/BUSY-RCLK-I/O
D0-DIN-I/O
DOUT-I/O
CCLK
November 9, 1998 (Version 3.1)
R
XC3000 Series Field Programmable Gate Arrays
XC3000 Series 68-Pin PLCC, 84-Pin PLCC and PGA Pinouts
XC3000A, XC3000L, XC3100A, and XC3100L families have identical pinouts
68 PLCC
XC3030A XC3020A
68 PLCC
XC3020A, XC3030A,
XC3042A
84 PLCC
XC3030A XC3020A
XC3020A, XC3030A,
XC3042A
84 PLCC
10
10
PWRDN
12
44
44
RESET
54
11
11
TCLKIN-I/O
13
45
45
DONE-PG
55
12
—
I/O*
14
46
46
D7-I/O
56
13
12
I/O
15
47
47
XTL1(OUT)-BCLKIN-I/O
57
14
13
I/O
16
48
48
D6-I/O
58
—
—
I/O
17
—
—
I/O
59
15
14
I/O
18
49
49
D5-I/O
60
16
15
I/O
19
50
50
CS0-I/O
61
—
16
I/O
20
51
51
D4-I/O
62
17
17
I/O
21
—
—
I/O
63
18
18
VCC
22
52
52
VCC
64
19
19
I/O
23
53
53
D3-I/O
65
—
—
I/O
24
54
54
CS1-I/O
66
20
20
I/O
25
55
55
D2-I/O
67
—
21
I/O
26
—
—
I/O
68
21
22
I/O
27
—
—
I/O*
69
70
22
—
I/O
28
56
56
D1-I/O
23
23
I/O
29
57
57
RDY/BUSY-RCLK-I/O
71
24
24
I/O
30
58
58
D0-DIN-I/O
72
25
25
M1-RDATA
31
59
59
DOUT-I/O
73
26
26
M0-RTRIG
32
60
60
CCLK
74
27
27
M2-I/O
33
61
61
A0-WS-I/O
75
28
28
HDC-I/O
34
62
62
A1-CS2-I/O
76
29
29
I/O
35
63
63
A2-I/O
77
30
30
LDC-I/O
36
64
64
A3-I/O
78
—
31
I/O
37
—
—
I/O*
79
I/O*
38
—
—
I/O*
80
31
—
32
I/O
39
65
65
A15-I/O
81
32
33
I/O
40
66
66
A4-I/O
82
33
—
I/O*
41
67
67
A14-I/O
83
34
34
INIT-I/O
42
68
68
A5-I/O
84
35
35
GND
43
1
1
GND
1
36
36
I/O
44
2
2
A13-I/O
2
37
37
I/O
45
3
3
A6-I/O
3
38
38
I/O
46
4
4
A12-I/O
4
39
39
I/O
47
5
5
A7-I/O
5
—
40
I/O
48
—
—
I/O*
6
—
41
40
41
I/O
49
—
—
I/O*
7
I/O*
50
6
6
A11-I/O
8
I/O*
51
7
7
A8-I/O
9
42
42
I/O
52
8
8
A10-I/O
10
43
43
XTL2(IN)-I/O
53
9
9
A9-I/O
11
7
Unprogrammed IOBs have a default pull-up. This prevents an undefined pad level for unbonded or unused IOBs.
Programmed outputs are default slew-rate limited.
This table describes the pinouts of three different chips in three different packages. The pin-description column lists 84 of the
118 pads on the XC3042A (and 84 of the 98 pads on the XC3030A) that are connected to the 84 package pins. Ten pads,
indicated by an asterisk, do not exist on the XC3020A, which has 74 pads; therefore the corresponding pins on the 84-pin
packages have no connections to an XC3020A. Six pads on the XC3020A and 16 pads on the XC3030A, indicated by a
dash (—) in the 68 PLCC column, have no connection to the 68 PLCC, but are connected to the 84-pin packages.
November 9, 1998 (Version 3.1)
7-67
R
XC3000 Series Field Programmable Gate Arrays
XC3064A/XC3090A/XC3195A 84-Pin PLCC Pinouts
XC3000A, XC3000L, XC3100A, and XC3100L families have identical pinouts
PLCC Pin Number
12
XC3064A, XC3090A, XC3195A
PWRDN
PLCC Pin Number
54
XC3064A, XC3090A, XC3195A
RESET
13
TCLKIN-I/O
55
DONE-PG
14
15
I/O
I/O
56
57
D7-I/O
XTL1(OUT)-BCLKIN-I/O
16
I/O
58
D6-I/O
17
18
I/O
I/O
59
60
I/O
D5-I/O
19
I/O
61
CS0-I/O
20
21
I/O
GND*
62
63
D4-I/O
I/O
22
23
VCC
I/O
64
65
VCC
GND*
24
I/O
66
D3-I/O*
25
26
I/O
I/O
67
68
CS1-I/O*
D2-I/O*
27
I/O
69
I/O
28
29
I/O
I/O
70
71
D1-I/O
RDY/BUSY-RCLK-I/O
30
31
I/O
M1-RDATA
72
73
D0-DIN-I/O
DOUT-I/O
32
M0-RTRIG
74
CCLK
33
34
M2-I/O
HDC-I/O
75
76
A0-WS-I/O
A1-CS2-I/O
35
I/O
77
A2-I/O
36
37
LDC-I/O
I/O
78
79
A3-I/O
I/O
38
39
I/O
I/O
80
81
I/O
A15-I/O
40
I/O
82
A4-I/O
41
42
INIT/I/O*
VCC*
83
84
A14-I/O
A5-I/O
43
GND
1
GND
44
45
I/O
I/O
2
3
VCC*
A13-I/O*
46
47
I/O
I/O
4
5
A6-I/O*
A12-I/O*
48
I/O
6
A7-I/O*
49
50
I/O
I/O
7
8
I/O
A11-I/O
51
I/O
9
A8-I/O
52
53
I/O
XTL2(IN)-I/O
10
11
A10-I/O
A9-I/O
Unprogrammed IOBs have a default pull-up. This prevents an undefined pad level for unbonded or unused IOBs.
Programmed outputs are default slew-rate limited.
* In the PC84 package, XC3064A, XC3090A and XC3195A have additional VCC and GND pins and thus a different pin
definition than XC3020A/XC3030A/XC3042A.
7-68
November 9, 1998 (Version 3.1)
R
XC3000 Series Field Programmable Gate Arrays
XC3000 Series 100-Pin QFP Pinouts
XC3000A, XC3000L, XC3100A, and XC3100L families have identical pinouts
Pin No.
TQFP
PQFP VQFP
16
17
13
14
XC3020A
XC3030A
XC3042A
GND
A13-I/O
Pin No.
TQFP
PQFP VQFP
50
51
XC3020A
XC3030A
XC3042A
47
48
I/O*
I/O*
Pin No.
TQFP
PQFP VQFP
84
85
81
82
XC3020A
XC3030A
XC3042A
I/O*
I/O*
18
15
A6-I/O
52
49
M1-RD
86
83
I/O
19
20
16
17
A12-I/O
A7-I/O
53
54
50
51
GND*
MO-RT
87
88
84
85
D5-I/O
CS0-I/O
21
18
I/O*
55
52
VCC*
89
86
D4-I/O
22
23
19
20
I/O*
A11-I/O
56
57
53
54
M2-I/O
HDC-I/O
90
91
87
88
I/O
VCC
24
25
21
22
A8-I/O
A10-I/O
58
59
55
56
I/O
LDC-I/O
92
93
89
90
D3-I/O
CS1-I/O
26
23
A9-I/O
60
57
I/O*
94
91
D2-I/O
27
28
24
25
VCC*
GND*
61
62
58
59
I/O*
I/O
95
96
92
93
I/O
I/O*
29
26
PWRDN
63
60
I/O
97
94
I/O*
30
31
27
28
TCLKIN-I/O
I/O**
64
65
61
62
I/O
INIT-I/O
98
99
95
96
D1-I/O
RDY/BUSY-RCLK-I/O
32
33
29
30
I/O*
I/O*
66
67
63
64
GND
I/O
100
1
97
98
DO-DIN-I/O
DOUT-I/O
34
31
I/O
68
65
I/O
2
99
CCLK
35
36
32
33
I/O
I/O
69
70
66
67
I/O
I/O
3
4
100
1
VCC*
GND*
37
34
I/O
71
68
I/O
5
2
AO-WS-I/O
38
39
35
36
I/O
I/O
72
73
69
70
I/O
I/O
6
7
3
4
A1-CS2-I/O
I/O**
40
41
37
38
I/O
VCC
74
75
71
72
I/O*
I/O*
8
9
5
6
A2-I/O
A3-I/O
42
39
I/O
76
73
XTL2-I/O
10
7
I/O*
43
44
40
41
I/O
I/O
77
78
74
75
GND*
RESET
11
12
8
9
I/O*
A15-I/O
45
42
I/O
79
76
VCC*
13
10
A4-I/O
46
47
43
44
I/O
I/O
80
81
77
78
DONE-PG
D7-I/O
14
15
11
12
A14-I/O
A5-I/O
48
45
I/O
82
79
BCLKIN-XTL1-I/O
49
46
I/O
83
80
D6-I/O
7
Unprogrammed IOBs have a default pull-up. This prevents an undefined pad level for unbonded or unused IOBs.
Programmed outputs are default slew-rate limited.
* This table describes the pinouts of three different chips in three different packages. The pin-description column lists 100 of
the 118 pads on the XC3042A that are connected to the 100 package pins. Two pads, indicated by double asterisks, do not
exist on the XC3030A, which has 98 pads; therefore the corresponding pins have no connections. Twenty-six pads,
indicated by single or double asterisks, do not exist on the XC3020A, which has 74 pads; therefore, the corresponding pins
have no connections. (See table on page 65.)
November 9, 1998 (Version 3.1)
7-69
R
XC3000 Series Field Programmable Gate Arrays
XC3000 Series 132-Pin Ceramic and Plastic PGA Pinouts
XC3000A, XC3000L, XC3100A, and XC3100L families have identical pinouts
PGA
Pin
Number
C4
A1
C3
B2
B3
A2
B4
C5
A3
A4
B5
C6
A5
B6
A6
B7
C7
C8
A7
B8
A8
A9
B9
C9
A10
B10
A11
C10
B11
A12
B12
A13
C12
XC3042A
XC3064A
GND
PWRDN
I/O-TCLKIN
I/O
I/O
I/O*
I/O
I/O
I/O*
I/O
I/O
I/O
I/O
I/O
I/O
I/O
GND
VCC
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O*
I/O
I/O
I/O*
I/O
I/O*
I/O
PGA
Pin
Number
B13
C11
A14
D12
C13
B14
C14
E12
D13
D14
E13
F12
E14
F13
F14
G13
G14
G12
H12
H14
H13
J14
J13
K14
J12
K13
L14
L13
K12
M14
N14
M13
L12
XC3042A
XC3064A
M1-RD
GND
M0-RT
VCC
M2-I/O
HDC-I/O
I/O
I/O
I/O
LDC-I/O
I/O*
I/O
I/O
I/O
I/O
I/O
INIT-I/O
VCC
GND
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O*
I/O
I/O
I/O
I/O
XTL2(IN)-I/O
GND
PGA
Pin
XC3042A
Number
XC3064A
P14
RESET
M11
VCC
N13
DONE-PG
M12
D7-I/O
P13
XTL1-I/O-BCLKIN
N12
I/O
P12
I/O
N11
D6-I/O
M10
I/O
P11
I/O*
N10
I/O
P10
I/O
M9
D5-I/O
N9
CS0-I/O
P9
I/O*
P8
I/O*
N8
D4-I/O
P7
I/O
M8
VCC
M7
GND
N7
D3-I/O
P6
CS1-I/O
N6
I/O*
P5
I/O*
M6
D2-I/O
N5
I/O
P4
I/O
P3
I/O
M5
D1-I/O
N4
RDY/BUSY-RCLK-I/O
P2
I/O
N3
I/O
N2
D0-DIN-I/O
PGA
Pin
Number
M3
P1
M4
L3
M2
N1
M1
K3
L2
L1
K2
J3
K1
J2
J1
H1
H2
H3
G3
G2
G1
F1
F2
E1
F3
E2
D1
D2
E3
C1
B1
C2
D3
XC3042A
XC3064A
DOUT-I/O
CCLK
VCC
GND
A0-WS-I/O
A1-CS2-I/O
I/O
I/O
A2-I/O
A3-I/O
I/O
I/O
A15-I/O
A4-I/O
I/O*
A14-I/O
A5-I/O
GND
VCC
A13-I/O
A6-I/O
I/O*
A12-I/O
A7-I/O
I/O
I/O
A11-I/O
A8-I/O
I/O
I/O
A10-I/O
A9-I/O
VCC
Unprogrammed IOBs have a default pull-up. This prevents an undefined pad level for unbonded or unused IOBs.
Programmed outputs are default slew-rate limited.
* Indicates unconnected package pins (14) for the XC3042A.
7-70
November 9, 1998 (Version 3.1)
R
XC3000 Series Field Programmable Gate Arrays
XC3000 Series 144-Pin Plastic TQFP Pinouts
XC3000A, XC3000L, XC3100A, and XC3100L families have identical pinouts
XC3042A
XC3064A
XC3090A
Pin
Number
1
PWRDN
2
I/O-TCLKIN
3
I/O*
4
I/O
5
I/O
6
I/O*
54
VCC
102
D1-I/O
7
I/O
55
GND
103
RDY/BUSY-RCLK-I/O
I/O
Pin
Number
XC3042A
XC3064A
XC3090A
Pin
Number
XC3042A
XC3064A
XC3090A
49
I/O
97
I/O
50
I/O*
98
I/O
51
I/O
99
I/O*
52
I/O
100
I/O
53
INIT-I/O
101
I/O*
8
I/O
56
I/O
104
9
I/O*
57
I/O
105
I/O
10
I/O
58
I/O
106
D0-DIN-I/O
11
I/O
59
I/O
107
DOUT-I/O
12
I/O
60
I/O
108
CCLK
13
I/O
61
I/O
109
VCC
14
I/O
62
I/O
110
GND
15
I/O*
63
I/O*
111
A0-WS-I/O
16
I/O
64
I/O*
112
A1-CS2-I/O
17
I/O
65
I/O
113
I/O
18
GND
66
I/O
114
I/O
19
VCC
67
I/O
115
A2-I/O
20
I/O
68
I/O
116
A3-I/O
21
I/O
69
XTL2(IN)-I/O
117
I/O
22
I/O
70
GND
118
I/O
23
I/O
71
RESET
119
A15-I/O
24
I/O
72
VCC
120
A4-I/O
I/O*
25
I/O
73
DONE-PG
121
26
I/O
74
D7-I/O
122
I/O*
27
I/O
75
XTL1(OUT)-BCLKIN-I/O
123
A14-I/O
28
I/O*
76
I/O
124
A5-I/O
29
I/O
77
I/O
125
I/O (XC3090 only)
30
I/O
78
D6-I/O
126
GND
31
I/O*
79
I/O
127
VCC
32
I/O*
80
I/O*
128
A13-I/O
A6-I/O
33
I/O
81
I/O
129
34
I/O*
82
I/O
130
I/O*
35
I/O
83
I/O*
131
I/O (XC3090 only)
36
M1-RD
84
D5-I/O
132
I/O*
37
GND
85
CS0-I/O
133
A12-I/O
38
M0-RT
86
I/O*
134
A7-I/O
39
VCC
87
I/O*
135
I/O
40
M2-I/O
88
D4-I/O
136
I/O
41
HDC-I/O
89
I/O
137
A11-I/O
42
I/O
90
VCC
138
A8-I/O
43
I/O
91
GND
139
I/O
44
I/O
92
D3-I/O
140
I/O
45
LDC-I/O
93
CS1-I/O
141
A10-I/O
46
I/O*
94
I/O*
142
A9-I/O
47
I/O
95
I/O*
143
VCC
48
I/O
96
D2-I/O
144
GND
7
Unprogrammed IOBs have a default pull-up. This prevents an undefined pad level for unbonded or unused IOBs.
Programmed outputs are default slew-rate limited.
* Indicates unconnected package pins (24) for the XC3042A.
November 9, 1998 (Version 3.1)
7-71
R
XC3000 Series Field Programmable Gate Arrays
XC3000 Series 160-Pin PQFP Pinouts
XC3000A, XC3000L, XC3100A, and XC3100L families have identical pinouts
XC3064A, XC3090A,
XC3195A
PQFP Pin
Number
XC3064A, XC3090A,
XC3195A
81
D7-I/O
121
CCLK
82
XTL1-I/O-BCLKIN
122
VCC
VCC
83
I/O*
123
GND
44
M2-I/O
84
I/O
124
A0-WS-I/O
45
HDC-I/O
85
I/O
125
A1-CS2-I/O
I/O
46
I/O
86
D6-I/O
126
I/O
I/O
47
I/O
87
I/O
127
I/O
I/O
48
I/O
88
I/O
128
A2-I/O
PQFP Pin
Number
XC3064A, XC3090A,
XC3195A
PQFP Pin
Number
XC3064A, XC3090A,
XC3195A
PQFP Pin
Number
1
I/O*
2
I/O*
41
GND
42
M0–RTRIG
3
I/O*
43
4
I/O
5
I/O
6
7
8
9
I/O
49
LDC-I/O
89
I/O
129
A3-I/O
10
I/O
50
I/O*
90
I/O
130
I/O
11
I/O
51
I/O*
91
I/O
131
I/O
12
I/O
52
I/O
92
D5-I/O
132
A15-I/O
13
I/O
53
I/O
93
CS0-I/O
133
A4-I/O
14
I/O
54
I/O
94
I/O*
134
I/O
15
I/O
55
I/O
95
I/O*
135
I/O
16
I/O
56
I/O
96
I/O
136
A14-I/O
17
I/O
57
I/O
97
I/O
137
A5-I/O
18
I/O
58
I/O
98
D4-I/O
138
I/O*
19
GND
59
INIT-I/O
99
I/O
139
GND
20
VCC
60
VCC
100
VCC
140
VCC
21
I/O*
61
GND
101
GND
141
A13-I/O
22
I/O
62
I/O
102
D3-I/O
142
A6-I/O
23
I/O
63
I/O
103
CS1-I/O
143
I/O*
24
I/O
64
I/O
104
I/O
144
I/O*
25
I/O
65
I/O
105
I/O
145
I/O
26
I/O
66
I/O
106
I/O*
146
I/O
27
I/O
67
I/O
107
I/O*
147
A12-I/O
28
I/O
68
I/O
108
D2-I/O
148
A7-I/O
29
I/O
69
I/O
109
I/O
149
I/O
30
I/O
70
I/O
110
I/O
150
I/O
31
I/O
71
I/O
111
I/O
151
A11-I/O
32
I/O
72
I/O
112
I/O
152
A8-I/O
33
I/O
73
I/O
113
I/O
153
I/O
34
I/O
74
I/O
114
D1-I/O
154
I/O
35
I/O
75
I/O*
115
RDY/BUSY-RCLK-I/O
155
A10-I/O
36
I/O
76
XTL2-I/O
116
I/O
156
A9-I/O
37
I/O
77
GND
117
I/O
157
VCC
38
I/O*
78
RESET
118
I/O*
158
GND
39
I/O*
79
VCC
119
D0-DIN-I/O
159
PWRDWN
40
M1-RDATA
80
DONE/PG
120
DOUT-I/O
160
TCLKIN-I/O
Unprogrammed IOBs have a default pull-up. This prevents an undefined pad level for unbonded or unused IOBs.
Programmed IOBs are default slew-rate limited.
* Indicates unconnected package pins (18) for the XC3064A.
7-72
November 9, 1998 (Version 3.1)
R
XC3000 Series Field Programmable Gate Arrays
XC3000 Series 175-Pin Ceramic and Plastic PGA Pinouts
XC3000A, XC3000L, XC3100A, and XC3100L families have identical pinouts
PGA Pin
Number
XC3090A, XC3195A
PGA Pin
Number
XC3090A, XC3195A
PGA Pin
Number
XC3090A, XC3195A
PGA Pin
Number
XC3090A, XC3195A
B2
PWRDN
D13
I/O
R14
DONE-PG
N4
DOUT-I/O
D4
TCLKIN-I/O
B14
M1-RDATA
N13
D7-I/O
R2
CCLK
B3
I/O
C14
GND
T14
XTL1(OUT)-BCLKIN-I/O
P3
VCC
C4
I/O
B15
M0-RTRIG
P13
I/O
N3
GND
B4
I/O
D14
VCC
R13
I/O
P2
A0-WS-I/O
A4
I/O
C15
M2-I/O
T13
I/O
M3
A1-CS2-I/O
D5
I/O
E14
HDC-I/O
N12
I/O
R1
I/O
C5
I/O
B16
I/O
P12
D6-I/O
N2
I/O
B5
I/O
D15
I/O
R12
I/O
P1
A2-I/O
A5
I/O
C16
I/O
T12
I/O
N1
A3-I/O
C6
I/O
D16
LDC-I/O
P11
I/O
L3
I/O
D6
I/O
F14
I/O
N11
I/O
M2
I/O
B6
I/O
E15
I/O
R11
I/O
M1
A15-I/O
A6
I/O
E16
I/O
T11
D5-I/O
L2
A4-I/O
B7
I/O
F15
I/O
R10
CS0-I/O
L1
I/O
C7
I/O
F16
I/O
P10
I/O
K3
I/O
D7
I/O
G14
I/O
N10
I/O
K2
A14-I/O
A7
I/O
G15
I/O
T10
I/O
K1
A5-I/O
A8
I/O
G16
I/O
T9
I/O
J1
I/O
B8
I/O
H16
I/O
R9
D4-I/O
J2
I/O
C8
I/O
H15
INIT-I/O
P9
I/O
J3
GND
D8
GND
H14
VCC
N9
VCC
H3
VCC
D9
VCC
J14
GND
N8
GND
H2
A13-I/O
C9
I/O
J15
I/O
P8
D3-I/O
H1
A6-I/O
B9
I/O
J16
I/O
R8
CS1-I/O
G1
I/O
A9
I/O
K16
I/O
T8
I/O
G2
I/O
A10
I/O
K15
I/O
T7
I/O
G3
I/O
D10
I/O
K14
I/O
N7
I/O
F1
I/O
C10
I/O
L16
I/O
P7
I/O
F2
A12-I/O
B10
I/O
L15
I/O
R7
D2-I/O
E1
A7-I/O
A11
I/O
M16
I/O
T6
I/O
E2
I/O
B11
I/O
M15
I/O
R6
I/O
F3
I/O
D11
I/O
L14
I/O
N6
I/O
D1
A11-I/O
C11
I/O
N16
I/O
P6
I/O
C1
A8-I/O
A12
I/O
P16
I/O
T5
I/O
D2
I/O
B12
I/O
N15
I/O
R5
D1-I/O
B1
I/O
C12
I/O
R16
I/O
P5
RDY/BUSY-RCLK-I/O
E3
A10-I/O
D12
I/O
M14
I/O
N5
I/O
C2
A9-I/O
A13
I/O
P15
XTL2(IN)-I/O
T4
I/O
D3
VCC
B13
I/O
N14
GND
R4
I/O
C3
GND
C13
I/O
R15
RESET
P4
I/O
A14
I/O
P14
VCC
R3
D0-DIN-I/O
7
Unprogrammed IOBs have a default pull-up. This prevents an undefined pad level for unbonded or unused IOBs.
Programmed outputs are default slew-rate limited.
Pins A2, A3, A15, A16, T1, T2, T3, T15 and T16 are not connected. Pin A1 does not exist.
November 9, 1998 (Version 3.1)
7-73
R
XC3000 Series Field Programmable Gate Arrays
XC3000 Series 176-Pin TQFP Pinouts
XC3000A, XC3000L, XC3100A, and XC3100L families have identical pinouts
Pin
Number
XC3090A
Pin
Number
XC3090A
Pin
Number
XC3090A
Pin
Number
XC3090A
1
PWRDWN
45
M1-RDATA
89
DONE-PG
133
VCC
2
TCLKIN-I/O
46
GND
90
D7-I/O
134
GND
3
I/O
47
M0-RTRIG
91
XTAL1(OUT)-BCLKIN-I/O
135
A0-WS-I/O
4
I/O
48
VCC
92
I/O
136
A1-CS2-I/O
5
I/O
49
M2-I/O
93
I/O
137
–
6
I/O
50
HDC-I/O
94
I/O
138
I/O
7
I/O
51
I/O
95
I/O
139
I/O
8
I/O
52
I/O
96
D6-I/O
140
A2-I/O
9
I/O
53
I/O
97
I/O
141
A3-I/O
10
I/O
54
LDC-I/O
98
I/O
142
–
11
I/O
55
–
99
I/O
143
–
12
I/O
56
I/O
100
I/O
144
I/O
13
I/O
57
I/O
101
I/O
145
I/O
14
I/O
58
I/O
102
D5-I/O
146
A15-I/O
15
I/O
59
I/O
103
CS0-I/O
147
A4-I/O
16
I/O
60
I/O
104
I/O
148
I/O
17
I/O
61
I/O
105
I/O
149
I/O
18
I/O
62
I/O
106
I/O
150
A14-I/O
19
I/O
63
I/O
107
I/O
151
A5-I/O
20
I/O
64
I/O
108
D4-I/O
152
I/O
21
I/O
65
INIT-I/O
109
I/O
153
I/O
22
GND
66
VCC
110
VCC
154
GND
23
VCC
67
GND
111
GND
155
VCC
24
I/O
68
I/O
112
D3-I/O
156
A13-I/O
25
I/O
69
I/O
113
CS1-I/O
157
A6-I/O
26
I/O
70
I/O
114
I/O
158
I/O
27
I/O
71
I/O
115
I/O
159
I/O
28
I/O
72
I/O
116
I/O
160
–
29
I/O
73
I/O
117
I/O
161
–
30
I/O
74
I/O
118
D2-I/O
162
I/O
31
I/O
75
I/O
119
I/O
163
I/O
32
I/O
76
I/O
120
I/O
164
A12-I/O
33
I/O
77
I/O
121
I/O
165
A7-I/O
34
I/O
78
I/O
122
I/O
166
I/O
35
I/O
79
I/O
123
I/O
167
I/O
36
I/O
80
I/O
124
D1-I/O
168
–
37
I/O
81
I/O
125
RDY/BUSY-RCLK-I/O
169
A11-I/O
38
I/O
82
–
126
I/O
170
A8-I/O
39
I/O
83
–
127
I/O
171
I/O
40
I/O
84
I/O
128
I/O
172
I/O
41
I/O
85
XTAL2(IN)-I/O
129
I/O
173
A10-I/O
42
I/O
86
GND
130
D0-DIN-I/O
174
A9-I/O
43
I/O
87
RESET
131
DOUT-I/O
175
VCC
44
–
88
VCC
132
CCLK
176
GND
Unprogrammed IOBs have a default pull-up. This prevents an undefined pad level for unbonded or unused IOBs.
Programmed outputs are default slew-rate limited.
7-74
November 9, 1998 (Version 3.1)
R
XC3000 Series Field Programmable Gate Arrays
XC3000 Series 208-Pin PQFP Pinouts
XC3000A, and XC3000L families have identical pinouts
Pin Number
XC3090A
Pin Number
XC3090A
Pin Number
XC3090A
Pin Number
XC3090A
1
–
53
–
105
–
157
–
2
GND
54
–
106
VCC
158
–
3
PWRDWN
55
VCC
107
D/P
159
–
4
TCLKIN-I/O
56
M2-I/O
108
–
160
GND
5
I/O
57
HDC-I/O
109
D7-I/O
161
WS-A0-I/O
6
I/O
58
I/O
110
XTL1-BCLKIN-I/O
162
CS2-A1-I/O
7
I/O
59
I/O
111
I/O
163
I/O
8
I/O
60
I/O
112
I/O
164
I/O
9
I/O
61
LDC-I/O
113
I/O
165
A2-I/O
10
I/O
62
I/O
114
I/O
166
A3-I/O
11
I/O
63
I/O
115
D6-I/O
167
I/O
12
I/O
64
–
116
I/O
168
I/O
13
I/O
65
–
117
I/O
169
–
14
I/O
66
–
118
I/O
170
–
15
–
67
–
119
–
171
–
16
I/O
68
I/O
120
I/O
172
A15-I/O
17
I/O
69
I/O
121
I/O
173
A4-I/O
18
I/O
70
I/O
122
D5-I/O
174
I/O
19
I/O
71
I/O
123
CS0-I/O
175
I/O
20
I/O
72
–
124
I/O
176
–
21
I/O
73
–
125
I/O
177
–
22
I/O
74
I/O
126
I/O
178
A14-I/O
23
I/O
75
I/O
127
I/O
179
A5-I/O
24
I/O
76
I/O
128
D4-I/O
180
I/O
25
GND
77
INIT-I/O
129
I/O
181
I/O
26
VCC
78
VCC
130
VCC
182
GND
27
I/O
79
GND
131
GND
183
VCC
28
I/O
80
I/O
132
D3-I/O
184
A13-I/O
29
I/O
81
I/O
133
CS1-I/O
185
A6-I/O
30
I/O
82
I/O
134
I/O
186
I/O
31
I/O
83
–
135
I/O
187
I/O
32
I/O
84
–
136
I/O
188
–
33
I/O
85
I/O
137
I/O
189
–
34
I/O
86
I/O
138
D2-I/O
190
I/O
35
I/O
87
I/O
139
I/O
191
I/O
36
I/O
88
I/O
140
I/O
192
A12-I/O
37
–
89
I/O
141
I/O
193
A7-I/O
38
I/O
90
–
142
–
194
–
39
I/O
91
–
143
I/O
195
–
40
I/O
92
–
144
I/O
196
–
41
I/O
93
I/O
145
D1-I/O
197
I/O
42
I/O
94
I/O
146
RDY/BUSY-RCLK-I/O
198
I/O
43
I/O
95
I/O
147
I/O
199
A11-I/O
44
I/O
96
I/O
148
I/O
200
A8-I/O
45
I/O
97
I/O
149
I/O
201
I/O
46
I/O
98
I/O
150
I/O
202
I/O
47
I/O
99
I/O
151
DIN-D0-I/O
203
A10-I/O
48
M1-RDATA
100
XTL2-I/O
152
DOUT-I/O
204
A9-I/O
49
GND
101
GND
153
CCLK
205
VCC
50
M0-RTRIG
102
RESET
154
VCC
206
–
51
–
103
–
155
–
207
–
52
–
104
–
156
–
208
–
7
Unprogrammed IOBs have a default pull-up. This prevents an undefined pad level for unbonded or unused IOBs.
Programmed outputs are default slew-rate limited.
* In PQ208, XC3090A and XC3195A have different pinouts.
November 9, 1998 (Version 3.1)
7-75
R
XC3000 Series Field Programmable Gate Arrays
XC3195A PQ208 Pinouts
Pin Description
PQ208
Pin Description
PQ208
Pin Description
PQ208
Pin Description
PQ208
A9-I/O
206
D0-DIN-I/O
154
I/O
102
I/O
48
A10-I/O
205
I/O
153
I/O
101
I/O
47
I/O
204
I/O
152
I/O
100
I/O
46
I/O
203
I/O
151
I/O
99
I/O
45
I/O
202
I/O
150
I/O
98
I/O
44
I/O
201
RDY/BUSY-RCLK-I/O
149
I/O
97
I/O
43
A8-I/O
200
D1-I/O
148
I/O
96
I/O
42
A11-I/O
199
I/O
147
I/O
95
I/O
41
I/O
198
I/O
146
I/O
94
I/O
40
I/O
197
I/O
145
I/O
93
I/O
39
I/O
196
I/O
144
I/O
92
I/O
38
I/O
194
I/O
141
I/O
89
I/O
37
A7-I/O
193
I/O
140
I/O
88
I/O
36
A12-I/O
192
I/O
139
I/O
87
I/O
35
I/O
191
D2-I/O
138
I/O
86
I/O
34
I/O
190
I/O
137
I/O
85
I/O
33
I/O
189
I/O
136
I/O
84
I/O
32
I/O
188
I/O
135
I/O
83
I/O
31
I/O
187
I/O
134
I/O
82
I/O
30
I/O
186
CS1-I/O
133
I/O
81
I/O
29
A6-I/O
185
D3-I/O
132
I/O
80
I/O
28
A13-I/O
184
GND
131
GND
79
VCC
27
VCC
183
VCC
130
VCC
78
GND
26
GND
182
I/O
129
INIT
77
I/O
25
I/O
181
D4-I/O
128
I/O
76
I/O
24
I/O
180
I/O
127
I/O
75
I/O
23
A5-I/O
179
I/O
126
I/O
74
I/O
22
A14-I/O
178
I/O
125
I/O
73
I/O
21
I/O
177
I/O
124
I/O
72
I/O
20
I/O
176
CS0-I/O
123
I/O
71
I/O
19
I/O
175
D5-I/O
122
I/O
70
I/O
18
I/O
174
I/O
121
I/O
69
I/O
17
A4-I/O
173
I/O
120
I/O
68
I/O
14
A15-I/O
172
I/O
119
I/O
67
I/O
13
I/O
171
I/O
118
I/O
66
I/O
12
I/O
169
I/O
117
I/O
63
I/O
11
I/O
168
I/O
116
I/O
62
I/O
10
I/O
167
I/O
115
I/O
61
I/O
9
A3-I/O
166
D6-I/O
114
I/O
60
I/O
8
A2-I/O
165
I/O
113
LDC-I/O
59
I/O
7
I/O
164
I/O
112
I/O
58
I/O
6
I/O
163
I/O
111
I/O
57
I/O
5
I/O
162
I/O
110
I/O
56
I/O
4
I/O
161
XTLX1(OUT)BCLKN-I/O
109
HDC-I/O
55
I/O
3
A1-CS2-I/O
160
D7-I/O
108
M2-I/O
54
TCLKIN-I/O
2
A0-WS-I/O
159
D/P
107
VCC
53
PWRDN
1
GND
158
VCC
106
M0-RTIG
52
GND
208
VCC
157
RESET
105
GND
51
VCC
207
CCLK
156
GND
104
M1/RDATA
50
DOUT-I/O
155
XTL2(IN)-I/O
103
I/O
49
Unprogrammed IOBs have a default pull-up. This prevents an undefined pad level for unbonded or unused IOBs. Programmed outputs are
default slew-rate limited.
In the PQ208 package, pins 15, 16, 64, 65, 90, 91, 142, 143, 170 and 195 are not connected.
* In PQ208, XC3090A and XC3195A have different pinouts.
7-76
November 9, 1998 (Version 3.1)
R
XC3000 Series Field Programmable Gate Arrays
Product Availability
Pins
44
64
68
144
160
176
208
Type
Plast.
PLCC
Plast.
VQFP
Plast.
PLCC
Plast.
PLCC
Cer.
PGA
Plast.
PQFP
Plast.
TQFP
Plast.
VQFP
Plast.
PGA
Cer.
PGA
Plast.
TQFP
Plast.
PQFP
Plast.
PGA
Cer.
PGA
Plast.
TQFP
Plast.
PQFP
PC44
VQ64
PC68
PC84
PG84
PQ100
TQ100
VQ100
PP132
PG132
TQ144
PQ160
PP175
PG175
TQ176
PQ208
CI
CI
CI
Code
XC3020A
XC3030A
-7
-6
84
100
132
175
CI
C
C
C
-7
CI
CI
CI
CI
CI
-6
C
C
C
C
C
C
CI
-7
CI
CI
CI
CI
CI
-6
C
C
C
C
C
C
-7
CI
CI
CI
CI
-6
C
C
C
C
C
-7
CI
CI
CI
CI
CI
CI
CI
-6
C
C
C
C
C
C
C
XC3020L
-8
CI
XC3030L
-8
CI
CI
XC3042L
-8
CI
CI
XC3064L
-8
CI
XC3090L
-8
CI
XC3042A
XC3064A
XC3090A
XC3120A
XC3130A
XC3142A
XC3164A
XC3190A
XC3195A
CI
CI
CI
CI
CI
-4
CI
CI
CI
-3
CI
CI
CI
-2
CI
CI
CI
-1
C
C
C
-09
C
C
C
-4
CI
CI
CI
CI
CI
CI
-3
CI
CI
CI
CI
CI
CI
-2
CI
CI
CI
CI
CI
CI
-1
C
C
C
C
C
C
-09
C
C
C
C
C
C
CI
7
-4
CI
CI
C
CI
-3
CI
CI
CI
CI
-2
CI
CI
CI
CI
-1
C
C
C
C
-09
C
C
C
-4
CI
CI
CI
-3
CI
CI
CI
-2
CI
CI
CI
-1
C
C
C
-09
C
C
C
-4
CI
CI
CI
CI
CI
CI
CI
-3
CI
CI
CI
CI
CI
CI
CI
-2
CI
CI
CI
CI
CI
CI
CI
-1
C
C
C
C
C
C
C
-09
C
C
C
C
C
C
C
-4
CI
CI
CI
CI
CI
-3
CI
CI
CI
CI
CI
-2
CI
CI
CI
CI
CI
-1
C
C
C
C
C
-09
C
C
C
C
C
November 9, 1998 (Version 3.1)
C
7-77
R
XC3000 Series Field Programmable Gate Arrays
Pins
44
64
68
84
Type
Plast.
PLCC
Plast.
VQFP
Plast.
PLCC
Plast.
PLCC
Cer.
PGA
Plast.
PQFP
Plast.
TQFP
Plast.
VQFP
Plast.
PGA
Code
PC44
VQ64
PC68
PC84
PG84
PQ100
TQ100
VQ100
PP132
XC3142L
XC3190L
100
C
C
C
C
144
160
175
Cer.
PGA
Plast.
TQFP
Plast.
PQFP
Plast.
PGA
PG132
TQ144
PQ160
PP175
176
208
Cer.
PGA
Plast.
TQFP
Plast.
PQFP
PG175
TQ176
PQ208
C
C
C
C
C
C
C
C
C = Commercial, TJ= 0° to +85°C
Notes:
132
I = Industrial, TJ = -40° to +100°C
Number of Available I/O Pins
XC3020A/XC3120A
XC3030A/XC3130A
XC3042A/3142A
XC2064A/XC3164A
XC3090A/XC3190A
XC3195A
Max I/O
64
80
96
120
144
176
44
64
34
54
68
58
58
84
64
74
74
70
70
70
Number of Package Pins
100
132
144
160
64
80
82
96
96
110
120
120
122
138
138
175
176
208
144
144
144
144
176
Ordering Information
Example:
Device Type
Speed Grade
XC3030A-3 PC44C
Temperature Range
Number of Pins
Package Type
Revision History
Date
11/98
7-78
Revision
Revised version number to 3.1, removed XC3100A-5 obsolete packages.
November 9, 1998 (Version 3.1)