ALTERA EPF81188A

FLEX 8000
Programmable Logic
Device Family
®
January 2003, ver. 11.1
Data Sheet
1
Features...
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Table 1. FLEX 8000 Device Features
Feature
Usable gates
Flipflops
EPF8282A
EPF8282AV
EPF8452A
EPF8636A
EPF8820A
EPF81188A EPF81500A
2,500
4,000
6,000
8,000
12,000
16,000
282
452
636
820
1,188
1,500
Logic array blocks (LABs)
26
42
63
84
126
162
Logic elements (LEs)
208
336
504
672
1,008
1,296
Maximum user I/O pins
78
120
136
152
184
208
Altera Corporation
DS-F8000-11.1
1
3
FLEX 8000
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Low-cost, high-density, register-rich CMOS programmable logic
device (PLD) family (see Table 1)
–
2,500 to 16,000 usable gates
–
282 to 1,500 registers
System-level features
– In-circuit reconfigurability (ICR) via external configuration
devices or intelligent controller
– Fully compliant with the peripheral component interconnect
Special Interest Group (PCI SIG) PCI Local Bus Specification,
Revision 2.2 for 5.0-V operation
– Built-in Joint Test Action Group (JTAG) boundary-scan test (BST)
circuitry compliant with IEEE Std. 1149.1-1990 on selected devices
– MultiVoltTM I/O interface enabling device core to run at 5.0 V,
while I/O pins are compatible with 5.0-V and 3.3-V logic levels
– Low power consumption (typical specification is 0.5 mA or less in
standby mode)
Flexible interconnect
– FastTrack® Interconnect continuous routing structure for fast,
predictable interconnect delays
– Dedicated carry chain that implements arithmetic functions such
as fast adders, counters, and comparators (automatically used by
software tools and megafunctions)
– Dedicated cascade chain that implements high-speed, high-fan-in
logic functions (automatically used by software tools and
megafunctions)
– Tri-state emulation that implements internal tri-state nets
Powerful I/O pins
Programmable output slew-rate control reduces switching noise
FLEX 8000 Programmable Logic Device Family Data Sheet
JTAG BST circuitry
Yes
...and More
Features
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No
Yes
EPF8282A
84Pin
PLCC
68
EPF8282AV
100Pin
TQFP
No
Yes
Peripheral register for fast setup and clock-to-output delay
Fabricated on an advanced SRAM process
Available in a variety of packages with 84 to 304 pins (see Table 2)
Software design support and automatic place-and-route provided by
the Altera® MAX+PLUS® II development system for Windows-based
PCs, as well as Sun SPARCstation, HP 9000 Series 700/800, and IBM
RISC System/6000 workstations
Additional design entry and simulation support provided by EDIF
2 0 0 and 3 0 0 netlist files, library of parameterized modules (LPM),
Verilog HDL, VHDL, and other interfaces to popular EDA tools from
manufacturers such as Cadence, Exemplar Logic, Mentor Graphics,
OrCAD, Synopsys, Synplicity, and Veribest
Table 2. FLEX 8000 Package Options & I/O Pin Count
Device
Yes
144Pin
TQFP
160Pin
PQFP
160Pin
PGA
120
120
Note (1)
192Pin
PGA
208Pin
PQFP
118
136
136
120
152
225Pin
BGA
232Pin
PGA
240Pin
PQFP
280Pin
PGA
304Pin
RQFP
208
208
78
78
EPF8452A
68
EPF8636A
68
EPF8820A
EPF81188A
EPF81500A
68
112
152
148
152
184
184
181
Note:
(1)
FLEX 8000 device package types include plastic J-lead chip carrier (PLCC), thin quad flat pack (TQFP), plastic quad
flat pack (PQFP), power quad flat pack (RQFP), ball-grid array (BGA), and pin-grid array (PGA) packages.
General
Description
2
Altera’s Flexible Logic Element MatriX (FLEX®) family combines the
benefits of both erasable programmable logic devices (EPLDs) and fieldprogrammable gate arrays (FPGAs). The FLEX 8000 device family is ideal
for a variety of applications because it combines the fine-grained
architecture and high register count characteristics of FPGAs with the
high speed and predictable interconnect delays of EPLDs. Logic is
implemented in LEs that include compact 4-input look-up tables (LUTs)
and programmable registers. High performance is provided by a fast,
continuous network of routing resources.
Altera Corporation
FLEX 8000 Programmable Logic Device Family Data Sheet
FLEX 8000 devices provide a large number of storage elements for
applications such as digital signal processing (DSP), wide-data-path
manipulation, and data transformation. These devices are an excellent
choice for bus interfaces, TTL integration, coprocessor functions, and
high-speed controllers. The high-pin-count packages can integrate
multiple 32-bit buses into a single device. Table 3 shows FLEX 8000
performance and LE requirements for typical applications.
Table 3. FLEX 8000 Performance
Application
LEs Used
Speed Grade
Units
A-2
A-3
A-4
16-bit loadable counter
16
125
95
83
MHz
16-bit up/down counter
16
125
95
83
MHz
24-bit accumulator
24
87
67
58
MHz
16-bit address decode
4
4.2
4.9
6.3
ns
16-to-1 multiplexer
10
6.6
7.9
9.5
ns
3
FLEX 8000
All FLEX 8000 device packages provide four dedicated inputs for
synchronous control signals with large fan-outs. Each I/O pin has an
associated register on the periphery of the device. As outputs, these
registers provide fast clock-to-output times; as inputs, they offer quick
setup times.
The logic and interconnections in the FLEX 8000 architecture are
configured with CMOS SRAM elements. FLEX 8000 devices are
configured at system power-up with data stored in an industry-standard
parallel EPROM or an Altera serial configuration devices, or with data
provided by a system controller. Altera offers the EPC1, EPC1213,
EPC1064, and EPC1441 configuration devices, which configure
FLEX 8000 devices via a serial data stream. Configuration data can also be
stored in an industry-standard 32 K × 8 bit or larger configuration device,
or downloaded from system RAM. After a FLEX 8000 device has been
configured, it can be reconfigured in-circuit by resetting the device and
loading new data. Because reconfiguration requires less than 100 ms, realtime changes can be made during system operation. For information on
how to configure FLEX 8000 devices, go to the following documents:
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Altera Corporation
Configuration Devices for APEX & FLEX Devices Data Sheet
BitBlaster Serial Download Cable Data Sheet
ByteBlasterMV Parallel Port Download Cable Data Sheet
Application Note 33 (Configuring FLEX 8000 Devices)
Application Note 38 (Configuring Multiple FLEX 8000 Devices)
3
FLEX 8000 Programmable Logic Device Family Data Sheet
FLEX 8000 devices contain an optimized microprocessor interface that
permits the microprocessor to configure FLEX 8000 devices serially, in
parallel, synchronously, or asynchronously. The interface also enables the
microprocessor to treat a FLEX 8000 device as memory and configure the
device by writing to a virtual memory location, making it very easy for the
designer to create configuration software.
The FLEX 8000 family is supported by Altera’s MAX+PLUS II
development system, a single, integrated package that offers schematic,
text—including the Altera Hardware Description Language (AHDL),
VHDL, and Verilog HDL—and waveform design entry, compilation and
logic synthesis, simulation and timing analysis, and device programming.
The MAX+PLUS II software provides EDIF 2 0 0 and 3 0 0, library of
parameterized modules (LPM), VHDL, Verilog HDL, and other interfaces
for additional design entry and simulation support from other industrystandard PC- and UNIX workstation-based EDA tools. The
MAX+PLUS II software runs on Windows-based PCs and Sun
SPARCstation, HP 9000 Series 700/800, and IBM RISC System/6000
workstations.
The MAX+PLUS II software interfaces easily with common gate array
EDA tools for synthesis and simulation. For example, the MAX+PLUS II
software can generate Verilog HDL files for simulation with tools such as
Cadence Verilog-XL. Additionally, the MAX+PLUS II software contains
EDA libraries that use device-specific features such as carry chains, which
are used for fast counter and arithmetic functions. For instance, the
Synopsys Design Compiler library supplied with the MAX+PLUS II
development system includes DesignWare functions that are optimized
for the FLEX 8000 architecture.
f
Functional
Description
For more information on the MAX+PLUS II software, go to the
MAX+PLUS II Programmable Logic Development System & Software Data
Sheet.
The FLEX 8000 architecture incorporates a large matrix of compact
building blocks called logic elements (LEs). Each LE contains a 4-input
LUT that provides combinatorial logic capability and a programmable
register that offers sequential logic capability. The fine-grained structure
of the LE provides highly efficient logic implementation.
Eight LEs are grouped together to form a logic array block (LAB). Each
FLEX 8000 LAB is an independent structure with common inputs,
interconnections, and control signals. The LAB architecture provides a
coarse-grained structure for high device performance and easy routing.
4
Altera Corporation
FLEX 8000 Programmable Logic Device Family Data Sheet
Figure 1 shows a block diagram of the FLEX 8000 architecture. Each group
of eight LEs is combined into an LAB; LABs are arranged into rows and
columns. The I/O pins are supported by I/O elements (IOEs) located at
the ends of rows and columns. Each IOE contains a bidirectional I/O
buffer and a flipflop that can be used as either an input or output register.
Figure 1. FLEX 8000 Device Block Diagram
I/O Element
(IOE)
IOE
IOE
IOE
IOE
IOE
IOE
IOE
IOE
FastTrack
Interconnect
Logic Array
Block (LAB)
IOE
IOE
IOE
3
FLEX 8000
IOE
Logic
Element (LE)
IOE
IOE
IOE
IOE
Signal interconnections within FLEX 8000 devices and between device
pins are provided by the FastTrack Interconnect, a series of fast,
continuous channels that run the entire length and width of the device.
IOEs are located at the end of each row (horizontal) and column (vertical)
FastTrack Interconnect path.
Altera Corporation
5
FLEX 8000 Programmable Logic Device Family Data Sheet
Logic Array Block
A logic array block (LAB) consists of eight LEs, their associated carry and
cascade chains, LAB control signals, and the LAB local interconnect. The
LAB provides the coarse-grained structure of the FLEX 8000 architecture.
This structure enables FLEX 8000 devices to provide efficient routing,
high device utilization, and high performance. Figure 2 shows a block
diagram of the FLEX 8000 LAB.
Figure 2. FLEX 8000 Logic Array Block
Dedicated
Inputs
24
Row Interconnect
4
8
LAB Local
Interconnect
(32 channels)
4
Carry-In and
Cascade-In
from LAB
on Left
LAB Control
Signals
6
4
See Figure 8
for details.
8
16
2
4
LE1
4
LE2
4
LE3
4
LE4
4
LE5
4
LE6
4
LE7
4
LE8
8
2
Column-to-Row
Interconnect
Column
Interconnect
Carry-Out and
Cascade-Out
to LAB on Right
Altera Corporation
FLEX 8000 Programmable Logic Device Family Data Sheet
Each LAB provides four control signals that can be used in all eight LEs.
Two of these signals can be used as clocks, and the other two for
clear/preset control. The LAB control signals can be driven directly from
a dedicated input pin, an I/O pin, or any internal signal via the LAB local
interconnect. The dedicated inputs are typically used for global clock,
clear, or preset signals because they provide synchronous control with
very low skew across the device. FLEX 8000 devices support up to four
individual global clock, clear, or preset control signals. If logic is required
on a control signal, it can be generated in one or more LEs in any LAB and
driven into the local interconnect of the target LAB.
Logic Element
The logic element (LE) is the smallest unit of logic in the FLEX 8000
architecture, with a compact size that provides efficient logic utilization.
Each LE contains a 4-input LUT, a programmable flipflop, a carry chain,
and cascade chain. Figure 3 shows a block diagram of an LE.
Figure 3. FLEX 8000 LE
Carry-In
FLEX 8000
DATA1
DATA2
DATA3
DATA4
3
Cascade-In
DFF
Look-Up
Table
(LUT)
Carry
Chain
Cascade
Chain
D
PRN
Q
LE-Out
CLRN
LABCTRL1
LABCTRL2
Clear/
Preset
Logic
Clock
Select
LABCTRL3
LABCTRL4
Carry-Out
Cascade-Out
The LUT is a function generator that can quickly compute any function of
four variables. The programmable flipflop in the LE can be configured for
D, T, JK, or SR operation. The clock, clear, and preset control signals on the
flipflop can be driven by dedicated input pins, general-purpose I/O pins,
or any internal logic. For purely combinatorial functions, the flipflop is
bypassed and the output of the LUT goes directly to the output of the LE.
Altera Corporation
7
FLEX 8000 Programmable Logic Device Family Data Sheet
The FLEX 8000 architecture provides two dedicated high-speed data
paths—carry chains and cascade chains—that connect adjacent LEs
without using local interconnect paths. The carry chain supports highspeed counters and adders; the cascade chain implements wide-input
functions with minimum delay. Carry and cascade chains connect all LEs
in an LAB and all LABs in the same row. Heavy use of carry and cascade
chains can reduce routing flexibility. Therefore, the use of carry and
cascade chains should be limited to speed-critical portions of a design.
Carry Chain
The carry chain provides a very fast (less than 1 ns) carry-forward
function between LEs. The carry-in signal from a lower-order bit moves
forward into the higher-order bit via the carry chain, and feeds into both
the LUT and the next portion of the carry chain. This feature allows the
FLEX 8000 architecture to implement high-speed counters and adders of
arbitrary width. The MAX+PLUS II Compiler can create carry chains
automatically during design processing; designers can also insert carry
chain logic manually during design entry.
Figure 4 shows how an n-bit full adder can be implemented in n + 1 LEs
with the carry chain. One portion of the LUT generates the sum of two bits
using the input signals and the carry-in signal; the sum is routed to the
output of the LE. The register is typically bypassed for simple adders, but
can be used for an accumulator function. Another portion of the LUT and
the carry chain logic generate the carry-out signal, which is routed directly
to the carry-in signal of the next-higher-order bit. The final carry-out
signal is routed to another LE, where it can be used as a general-purpose
signal. In addition to mathematical functions, carry chain logic supports
very fast counters and comparators.
8
Altera Corporation
FLEX 8000 Programmable Logic Device Family Data Sheet
Figure 4. FLEX 8000 Carry Chain Operation
Carry-In
a1
b1
LU
s1
Register
Carry
LE1
a2
b2
LUT
s2
Register
Carry Chain
LE2
3
LUT
FLEX 8000
an
bn
sn
Register
Carry Chain
LEn
LUT
Register
Carry-Out
Carry Chain
LEn + 1
Cascade Chain
With the cascade chain, the FLEX 8000 architecture can implement
functions that have a very wide fan-in. Adjacent LUTs can be used to
compute portions of the function in parallel; the cascade chain serially
connects the intermediate values. The cascade chain can use a logical AND
or logical OR (via De Morgan’s inversion) to connect the outputs of
adjacent LEs. Each additional LE provides four more inputs to the
effective width of a function, with a delay as low as 0.6 ns per LE.
Altera Corporation
9
FLEX 8000 Programmable Logic Device Family Data Sheet
The MAX+PLUS II Compiler can create cascade chains automatically
during design processing; designers can also insert cascade chain logic
manually during design entry. Cascade chains longer than eight LEs are
automatically implemented by linking LABs together. The last LE of an
LAB cascades to the first LE of the next LAB.
Figure 5 shows how the cascade function can connect adjacent LEs to
form functions with a wide fan-in. These examples show functions of 4n
variables implemented with n LEs. For a device with an A-2 speed grade,
the LE delay is 2.4 ns; the cascade chain delay is 0.6 ns. With the cascade
chain, 4.2 ns is needed to decode a 16-bit address.
Figure 5. FLEX 8000 Cascade Chain Operation
AND Cascade Chain
OR Cascade Chain
LE1
d[3..0]
LUT
d[7..4]
LUT
d[(4n-1)..4(n-1)]
LUT
LE1
d[3..0]
LUT
d[7..4]
LUT
d[(4n-1)..4(n-1)]
LUT
LE2
LE2
LEn
LEn
LE Operating Modes
The FLEX 8000 LE can operate in one of four modes, each of which uses
LE resources differently. See Figure 6. In each mode, seven of the ten
available inputs to the LE—the four data inputs from the LAB local
interconnect, the feedback from the programmable register, and the
carry-in and cascade-in from the previous LE—are directed to different
destinations to implement the desired logic function. The three remaining
inputs to the LE provide clock, clear, and preset control for the register.
The MAX+PLUS II software automatically chooses the appropriate mode
for each application. Design performance can also be enhanced by
designing for the operating mode that supports the desired application.
10
Altera Corporation
FLEX 8000 Programmable Logic Device Family Data Sheet
Figure 6. FLEX 8000 LE Operating Modes
Normal Mode
Cascade-In
Carry-In
LE-Out
PRN
D
Q
data1
data2
4-Input
LUT
data3
CLRN
Cascade-Out
data4
Arithmetic Mode
Cascade-In
Carry-In
LE-Out
D
data1
data2
PRN
Q
3-Input
LUT
CLRN
Cascade-Out
3-Input
LUT
3
Carry-Out
FLEX 8000
Up/Down Counter Mode
Cascade-In
Carry-In
data1 (ena)
data2 (nclr)
3-Input
LUT
1
D
PRN
Q
LE-Out
0
data3 (data)
CLRN
3-Input
LUT
data4 (nload)
Carry-Out
Cascade-Out
Clearable Counter Mode
Carry-In
data1 (ena)
data2 (nclr)
3-Input
LUT
1
D
PRN
Q
LE-Out
0
data3 (data)
CLRN
3-Input
LUT
data4 (nload)
Altera Corporation
Carry-Out
Cascade-Out
11
FLEX 8000 Programmable Logic Device Family Data Sheet
Normal Mode
The normal mode is suitable for general logic applications and wide
decoding functions that can take advantage of a cascade chain. In normal
mode, four data inputs from the LAB local interconnect and the carry-in
signal are the inputs to a 4-input LUT. Using a configurable SRAM bit, the
MAX+PLUS II Compiler automatically selects the carry-in or the DATA3
signal as an input. The LUT output can be combined with the cascade-in
signal to form a cascade chain through the cascade-out signal. The LE-Out
signal—the data output of the LE—is either the combinatorial output of
the LUT and cascade chain, or the data output (Q)of the programmable
register.
Arithmetic Mode
The arithmetic mode offers two 3-input LUTs that are ideal for
implementing adders, accumulators, and comparators. One LUT
provides a 3-bit function; the other generates a carry bit. As shown in
Figure 6, the first LUT uses the carry-in signal and two data inputs from
the LAB local interconnect to generate a combinatorial or registered
output. For example, in an adder, this output is the sum of three bits: a, b,
and the carry-in. The second LUT uses the same three signals to generate
a carry-out signal, thereby creating a carry chain. The arithmetic mode
also supports a cascade chain.
Up/Down Counter Mode
The up/down counter mode offers counter enable, synchronous
up/down control, and data loading options. These control signals are
generated by the data inputs from the LAB local interconnect, the carry-in
signal, and output feedback from the programmable register. Two 3-input
LUTs are used: one generates the counter data, and the other generates the
fast carry bit. A 2-to-1 multiplexer provides synchronous loading. Data
can also be loaded asynchronously with the clear and preset register
control signals, without using the LUT resources.
Clearable Counter Mode
The clearable counter mode is similar to the up/down counter mode, but
supports a synchronous clear instead of the up/down control; the clear
function is substituted for the cascade-in signal in the up/down counter
mode. Two 3-input LUTs are used: one generates the counter data, and
the other generates the fast carry bit. Synchronous loading is provided by
a 2-to-1 multiplexer, and the output of this multiplexer is ANDed with a
synchronous clear.
12
Altera Corporation
FLEX 8000 Programmable Logic Device Family Data Sheet
Internal Tri-State Emulation
Internal tri-state emulation provides internal tri-stating without the
limitations of a physical tri-state bus. In a physical tri-state bus, the
tri-state buffers’ output enable signals select the signal that drives the bus.
However, if multiple output enable signals are active, contending signals
can be driven onto the bus. Conversely, if no output enable signals are
active, the bus will float. Internal tri-state emulation resolves contending
tri-state buffers to a low value and floating buses to a high value, thereby
eliminating these problems. The MAX+PLUS II software automatically
implements tri-state bus functionality with a multiplexer.
Clear & Preset Logic Control
Logic for the programmable register’s clear and preset functions is
controlled by the DATA3, LABCTRL1, and LABCTRL2 inputs to the LE. The
clear and preset control structure of the LE is used to asynchronously load
signals into a register. The register can be set up so that LABCTRL1
implements an asynchronous load. The data to be loaded is driven to
DATA3; when LABCTRL1 is asserted, DATA3 is loaded into the register.
The clear and preset logic is implemented in one of the following six
asynchronous modes, which are chosen during design entry. LPM
functions that use registers will automatically use the correct
asynchronous mode. See Figure 7.
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Altera Corporation
Clear only
Preset only
Clear and preset
Load with clear
Load with preset
Load without clear or preset
13
3
FLEX 8000
During compilation, the MAX+PLUS II Compiler automatically selects
the best control signal implementation. Because the clear and preset
functions are active-low, the Compiler automatically assigns a logic high
to an unused clear or preset.
FLEX 8000 Programmable Logic Device Family Data Sheet
Figure 7. FLEX 8000 LE Asynchronous Clear & Preset Modes
Asynchronous Clear
Asynchronous Clear & Preset
Asynchronous Preset
VCC
LABCTRL1 or
LABCTRL2
LABCTRL1
PRN
PRN
PRN
D
Q
D
Q
D
CLRN
CLRN
CLRN
LABCTRL1 or
LABCTRL2
Q
LABCTRL2
Asynchronous Load with Clear
NOT
LABCTRL1
(Asynchronous
Load)
PRN
DATA3
(Data)
Q
D
NOT
CLRN
LABCTRL2
(Clear)
Asynchronous Load with Preset
LABCTRL1
(Asynchronous
Load)
NOT
LABCTRL2
(Preset)
PRN
Q
D
DATA3
(Data)
CLRN
NOT
Asynchronous Load without Clear or Preset
NOT
LABCTRL1
(Asynchronous
Load)
PRN
DATA3
(Data)
D
Q
CLRN
NOT
14
Altera Corporation
FLEX 8000 Programmable Logic Device Family Data Sheet
Asynchronous Clear
A register is cleared by one of the two LABCTRL signals. When the CLRn
port receives a low signal, the register is set to zero.
Asynchronous Preset
An asynchronous preset is implemented as either an asynchronous load
or an asynchronous clear. If DATA3 is tied to VCC, asserting LABCTRLl
asynchronously loads a 1 into the register. Alternatively, the
MAX+PLUS II software can provide preset control by using the clear and
inverting the input and output of the register. Inversion control is
available for the inputs to both LEs and IOEs. Therefore, if a register is
preset by only one of the two LABCTRL signals, the DATA3 input is not
needed and can be used for one of the LE operating modes.
Asynchronous Clear & Preset
When implementing asynchronous clear and preset, LABCTRL1 controls
the preset and LABCTRL2 controls the clear. The DATA3 input is tied to VCC;
therefore, asserting LABCTRL1 asynchronously loads a 1 into the register,
effectively presetting the register. Asserting LABCTRL2 clears the register.
When implementing an asynchronous load with the clear, LABCTRL1
implements the asynchronous load of DATA3 by controlling the register
preset and clear. LABCTRL2 implements the clear by controlling the
register clear.
Asynchronous Load with Preset
When implementing an asynchronous load in conjunction with a preset,
the MAX+PLUS II software provides preset control by using the clear and
inverting the input and output of the register. Asserting LABCTRL2 clears
the register, while asserting LABCTRL1 loads the register. The
MAX+PLUS II software inverts the signal that drives the DATA3 signal to
account for the inversion of the register’s output.
Asynchronous Load without Clear or Preset
When implementing an asynchronous load without the clear or preset,
LABCTRL1 implements the asynchronous load of DATA3 by controlling the
register preset and clear.
Altera Corporation
15
FLEX 8000
Asynchronous Load with Clear
3
FLEX 8000 Programmable Logic Device Family Data Sheet
FastTrack Interconnect
In the FLEX 8000 architecture, connections between LEs and device I/O
pins are provided by the FastTrack Interconnect, a series of continuous
horizontal (row) and vertical (column) routing channels that traverse the
entire FLEX 8000 device. This device-wide routing structure provides
predictable performance even in complex designs. In contrast, the
segmented routing structure in FPGAs requires switch matrices to
connect a variable number of routing paths, which increases the delays
between logic resources and reduces performance.
The LABs within FLEX 8000 devices are arranged into a matrix of
columns and rows. Each row of LABs has a dedicated row interconnect
that routes signals both into and out of the LABs in the row. The row
interconnect can then drive I/O pins or feed other LABs in the device.
Figure 8 shows how an LE drives the row and column interconnect.
Figure 8. FLEX 8000 LAB Connections to Row & Column Interconnect
16 Column
Channels
Row Channels
(1)
Each LE drives one
row channel.
LE1
LE2
to Local
to Local
Feedback Feedback
Each LE drives up to
two column channels.
Note:
(1)
16
See Table 4 for the number of row channels.
Altera Corporation
FLEX 8000 Programmable Logic Device Family Data Sheet
Each LE in an LAB can drive up to two separate column interconnect
channels. Therefore, all 16 available column channels can be driven by the
LAB. The column channels run vertically across the entire device, and
share access to LABs in the same column but in different rows. The
MAX+PLUS II Compiler chooses which LEs must be connected to a
column channel. A row interconnect channel can be fed by the output of
the LE or by two column channels. These three signals feed a multiplexer
that connects to a specific row channel. Each LE is connected to one 3-to-1
multiplexer. In an LAB, the multiplexers provide all 16 column channels
with access to 8 row channels.
Each column of LABs has a dedicated column interconnect that routes
signals out of the LABs into the column. The column interconnect can then
drive I/O pins or feed into the row interconnect to route the signals to
other LABs in the device. A signal from the column interconnect, which
can be either the output of an LE or an input from an I/O pin, must
transfer to the row interconnect before it can enter an LAB. Table 4
summarizes the FastTrack Interconnect resources available in each
FLEX 8000 device.
3
Table 4. FLEX 8000 FastTrack Interconnect Resources
Rows
Channels per Row
Columns
Channels per Column
EPF8282A
EPF8282AV
2
168
13
16
EPF8452A
2
168
21
16
EPF8636A
3
168
21
16
EPF8820A
4
168
21
16
EPF81188A
6
168
21
16
EPF81500A
6
216
27
16
Figure 9 shows the interconnection of four adjacent LABs, with row,
column, and local interconnects, as well as the associated cascade and
carry chains.
Altera Corporation
17
FLEX 8000
Device
FLEX 8000 Programmable Logic Device Family Data Sheet
Figure 9. FLEX 8000 Device Interconnect Resources
Each LAB is named according to its physical row (A, B, C, etc.) and column (1, 2, 3, etc.) position within the device.
See Figure 12
for details.
IOE
IOE
Column
Interconnect
IOE
IOE
See Figure 11
for details.
Row
Interconnect
1 IOE
IOE 1
8 IOE
IOE 8
LAB
A2
LAB
A1
1 IOE
IOE 1
8 IOE
IOE 8
LAB
B1
LAB
B2
LAB Local
Interconnect
Cascade &
Carry Chain
IOE
IOE
IOE
IOE
I/O Element
An IOE contains a bidirectional I/O buffer and a register that can be used
either as an input register for external data that requires a fast setup time,
or as an output register for data that requires fast clock-to-output
performance. IOEs can be used as input, output, or bidirectional pins. The
MAX+PLUS II Compiler uses the programmable inversion option to
automatically invert signals from the row and column interconnect where
appropriate. Figure 10 shows the IOE block diagram.
18
Altera Corporation
FLEX 8000 Programmable Logic Device Family Data Sheet
Figure 10. FLEX 8000 IOE
Numbers in parentheses are for EPF81500A devices only.
I/O Controls
6
To Row or Column
Interconnect
(6)
Programmable
Inversion
VCC
From Row or Column
Interconnect
D
Q
CLRN
Slew-Rate
Control
3
(OE [4..9])
FLEX 8000
CLR0
CLR1/OE0
CLK0
CLK1/OE1
OE2
OE3
VCC
Row-to-IOE Connections
Figure 11 illustrates the connection between row interconnect channels
and IOEs. An input signal from an IOE can drive two separate row
channels. When an IOE is used as an output, the signal is driven by an
n-to-1 multiplexer that selects the row channels. The size of the
multiplexer varies with the number of columns in a device. EPF81500A
devices use a 27-to-1 multiplexer; EPF81188A, EPF8820A, EPF8636A, and
EPF8452A devices use a 21-to-1 multiplexer; and EPF8282A and
EPF8282AV devices use a 13-to-1 multiplexer. Eight IOEs are connected to
each side of the row channels.
Altera Corporation
19
FLEX 8000 Programmable Logic Device Family Data Sheet
Figure 11. FLEX 8000 Row-to-IOE Connections
Numbers in parentheses are for EPF81500A devices. See Note (1).
2
2
2
2
Each IOE can drive
up to two row
channels.
2
2
2
2
n
IOE 1
n
IOE 2
n
IOE 3
n
IOE 4
n
IOE 5
n
IOE 6
n
IOE 7
n
IOE 8
Row Interconnect
168
(216)
Each IOE is
driven by an
n-to-1
multiplexer.
168
(216)
2
2
2
2
2
2
2
2
Note:
(1)
n = 13 for EPF8282A and EPF8282AV devices.
n = 21 for EPF8452A, EPF8636A, EPF8820A, and EPF81188A devices.
n = 27 for EPF81500A devices.
Column-to-IOE Connections
Two IOEs are located at the top and bottom of the column channels (see
Figure 12). When an IOE is used as an input, it can drive up to two
separate column channels. The output signal to an IOE can choose from 8
of the 16 column channels through an 8-to-1 multiplexer.
20
Altera Corporation
FLEX 8000 Programmable Logic Device Family Data Sheet
Figure 12. FLEX 8000 Column-to-IOE Connections
Each IOE is
driven by an
8-to-1
multiplexer.
IOE
IOE
8
8
Each IOE can drive
up to two column
signals.
16
Column Interconnect
Signals enter the FLEX 8000 device either from the I/O pins that provide
general-purpose input capability or from the four dedicated inputs. The
IOEs are located at the ends of the row and column interconnect channels.
I/O pins can be used as input, output, or bidirectional pins. Each I/O pin
has a register that can be used either as an input register for external data
that requires fast setup times, or as an output register for data that
requires fast clock-to-output performance. The MAX+PLUS II Compiler
uses the programmable inversion option to invert signals automatically
from the row and column interconnect when appropriate.
The clock, clear, and output enable controls for the IOEs are provided by
a network of I/O control signals. These signals can be supplied by either
the dedicated input pins or by internal logic. The IOE control-signal paths
are designed to minimize the skew across the device. All control-signal
sources are buffered onto high-speed drivers that drive the signals around
the periphery of the device. This “peripheral bus” can be configured to
provide up to four output enable signals (10 in EPF81500A devices), and
up to two clock or clear signals. Figure 13 on page 22 shows how two
output enable signals are shared with one clock and one clear signal.
Altera Corporation
21
3
FLEX 8000
In addition to general-purpose I/O pins, FLEX 8000 devices have four
dedicated input pins. These dedicated inputs provide low-skew, devicewide signal distribution, and are typically used for global clock, clear, and
preset control signals. The signals from the dedicated inputs are available
as control signals for all LABs and I/O elements in the device. The
dedicated inputs can also be used as general-purpose data inputs because
they can feed the local interconnect of each LAB in the device.
FLEX 8000 Programmable Logic Device Family Data Sheet
The signals for the peripheral bus can be generated by any of the four
dedicated inputs or signals on the row interconnect channels, as shown in
Figure 13. The number of row channels in a row that can drive the
peripheral bus correlates to the number of columns in the FLEX 8000
device. EPF8282A and EPF8282AV devices use 13 channels; EPF8452A,
EPF8636A, EPF8820A, and EPF81188A devices use 21 channels; and
EPF81500A devices use 27 channels. The first LE in each LAB is the source
of the row channel signal. The six peripheral control signals (12 in
EPF81500A devices) can be accessed by each IOE.
Figure 13. FLEX 8000 Peripheral Bus
Numbers in parentheses are for EPF81500A devices.
Peripheral Control
Signals
Programmable
Inversion
4
Dedicated
Inputs
1
2
OE2
OE3
(OE[4..9])
CLK0
CLK1/OE1
CLR0
n (1)
CLR1/OE0
Row Channels
Note:
(1)
22
n = 13 for EPF8282A and EPF8282AV devices.
n = 21 for EPF8452A, EPF8636A, EPF8820A, and EPF81188A devices.
n = 27 for EPF81500A devices.
Altera Corporation
FLEX 8000 Programmable Logic Device Family Data Sheet
Table 5 lists the source of the peripheral control signal for each FLEX 8000
device by row.
Table 5. Row Sources of FLEX 8000 Peripheral Control Signals
Peripheral
Control Signal
EPF8282A
EPF8282AV
EPF8452A
EPF8636A
EPF8820A
EPF81188A
EPF81500A
CLK0
Row A
Row A
Row A
Row A
Row E
Row E
CLK1/OE1
Row B
Row B
Row C
Row C
Row B
Row B
CLR0
Row A
Row A
Row B
Row B
Row F
Row F
CLR1/OE0
Row B
Row B
Row C
Row D
Row C
Row C
OE2
Row A
Row A
Row A
Row A
Row D
Row A
OE3
Row B
Row B
Row B
Row B
Row A
Row A
OE4
–
–
–
–
–
Row B
OE5
–
–
–
–
–
Row C
OE6
–
–
–
–
–
Row D
OE7
–
–
–
–
–
Row D
OE8
–
–
–
–
–
Row E
OE9
–
–
–
–
–
Row F
FLEX 8000
Output
Configuration
3
This section discusses slew-rate control and MultiVolt I/O interface
operation for FLEX 8000 devices.
Slew-Rate Control
The output buffer in each IOE has an adjustable output slew rate that can
be configured for low-noise or high-speed performance. A slow slew rate
reduces system noise by slowing signal transitions, adding a maximum
delay of 3.5 ns. The slow slew-rate setting affects only the falling edge of
a signal. The fast slew rate should be used for speed-critical outputs in
systems that are adequately protected against noise. Designers can specify
the slew rate on a pin-by-pin basis during design entry or assign a default
slew rate to all pins on a global basis.
f
Altera Corporation
For more information on high-speed system design, go to Application
Note 75 (High-Speed Board Designs).
23
FLEX 8000 Programmable Logic Device Family Data Sheet
MultiVolt I/O Interface
The FLEX 8000 device architecture supports the MultiVolt I/O interface
feature, which allows EPF81500A, EPF81188A, EPF8820A, and EPF8636A
devices to interface with systems with differing supply voltages. These
devices in all packages—except for EPF8636A devices in 84-pin PLCC
packages—can be set for 3.3-V or 5.0-V I/O pin operation. These devices
have one set of VCC pins for internal operation and input buffers
(VCCINT), and another set for I/O output drivers (VCCIO).
The VCCINT pins must always be connected to a 5.0-V power supply. With
a 5.0-V VCCINT level, input voltages are at TTL levels and are therefore
compatible with 3.3-V and 5.0-V inputs.
The VCCIO pins can be connected to either a 3.3-V or 5.0-V power supply,
depending on the output requirements. When the VCCIO pins are
connected to a 5.0-V power supply, the output levels are compatible with
5.0-V systems. When the VCCIO pins are connected to a 3.3-V power
supply, the output high is at 3.3 V and is therefore compatible with 3.3-V
or 5.0-V systems. Devices operating with VCCIO levels lower than 4.75 V
incur a nominally greater timing delay of tOD2 instead of tOD1. See Table 8
on page 26.
IEEE Std.
1149.1 (JTAG)
Boundary-Scan
Support
The EPF8282A, EPF8282AV, EPF8636A, EPF8820A, and EPF81500A
devices provide JTAG BST circuitry. FLEX 8000 devices with JTAG
circuitry support the JTAG instructions shown in Table 6.
Table 6. EPF8282A, EPF8282AV, EPF8636A, EPF8820A & EPF81500A JTAG Instructions
JTAG Instruction
Description
SAMPLE/PRELOAD Allows a snapshot of the signals at the device pins to be captured and examined during
normal device operation, and permits an initial data pattern to be output at the device pins.
EXTEST
Allows the external circuitry and board-level interconnections to be tested by forcing a test
pattern at the output pins and capturing test results at the input pins.
BYPASS
Places the 1-bit bypass register between the TDI and TDO pins, which allows the BST
data to pass synchronously through the selected device to adjacent devices during
normal device operation.
24
Altera Corporation
FLEX 8000 Programmable Logic Device Family Data Sheet
The instruction register length for FLEX 8000 devices is three bits. Table 7
shows the boundary-scan register length for FLEX 8000 devices.
Table 7. FLEX 8000 Boundary-Scan Register Length
Device
Boundary-Scan Register Length
EPF8282A, EPF8282AV
273
EPF8636A
417
EPF8820A
465
EPF81500A
645
FLEX 8000 devices that support JTAG include weak pull-ups on the JTAG
pins. Figure 14 shows the timing requirements for the JTAG signals.
Figure 14. EPF8282A, EPF8282AV, EPF8636A, EPF8820A & EPF81500A
JTAG Waveforms
3
TMS
FLEX 8000
TDI
tJCP
tJCH
tJCL
tJPSU
tJPH
TCK
tJPZX
tJPXZ
tJPCO
TDO
tJSSU
Signal
to Be
Captured
tJSZX
tJSH
tJSCO
tJSXZ
Signal
to Be
Driven
Table 8 shows the timing parameters and values for EPF8282A,
EPF8282AV, EPF8636A, EPF8820A, and EPF81500A devices.
Altera Corporation
25
FLEX 8000 Programmable Logic Device Family Data Sheet
Table 8. JTAG Timing Parameters & Values
Symbol
Parameter
EPF8282A
EPF8282AV
EPF8636A
EPF8820A
EPF81500A
Min
Unit
Max
tJCP
TCK clock period
100
tJCH
TCK clock high time
50
ns
ns
tJCL
TCK clock low time
50
ns
tJPSU
JTAG port setup time
20
ns
tJPH
JTAG port hold time
45
tJPCO
JTAG port clock to output
25
ns
tJPZX
JTAG port high-impedance to valid output
25
ns
tJPXZ
JTAG port valid output to high-impedance
25
ns
tJSSU
Capture register setup time
20
tJSH
Capture register hold time
45
tJSCO
Update register clock to output
35
ns
tJSZX
Update register high-impedance to valid output
35
ns
tJSXZ
Update register valid output to high-impedance
35
ns
ns
ns
ns
f
For detailed information on JTAG operation in FLEX 8000 devices, refer to
Application Note 39 (IEEE 1149.1 (JTAG) Boundary-Scan Testing in Altera
Devices).
Generic Testing
Each FLEX 8000 device is functionally tested and specified by Altera.
Complete testing of each configurable SRAM bit and all logic
functionality ensures 100% configuration yield. AC test measurements for
FLEX 8000 devices are made under conditions equivalent to those shown
in Figure 15. Designers can use multiple test patterns to configure devices
during all stages of the production flow.
26
Altera Corporation
FLEX 8000 Programmable Logic Device Family Data Sheet
Figure 15. FLEX 8000 AC Test Conditions
Power supply transients can affect AC
measurements. Simultaneous transitions
of multiple outputs should be avoided for
accurate measurement. Threshold tests
must not be performed under AC
conditions. Large-amplitude, fast-groundcurrent transients normally occur as the
device outputs discharge the load
capacitances. When these transients flow
through the parasitic inductance between
the device ground pin and the test system
ground, significant reductions in
observable noise immunity can result.
Numbers in parentheses are for 3.3-V
devices or outputs. Numbers without
parentheses are for 5.0-V devices or
outputs.
Operating
Conditions
464 Ω
(703 Ω)
Device
Output
To Test
System
250 Ω
(8.06 KΩ)
C1 (includes
JIG capacitance)
Device input
rise and fall
times < 3 ns
Tables 9 through 12 provide information on absolute maximum ratings,
recommended operating conditions, operating conditions, and
capacitance for 5.0-V FLEX 8000 devices.
Parameter
Note (1)
Conditions
Max
Unit
V
V CC
Supply voltage
–2.0
7.0
VI
DC input voltage
–2.0
7.0
V
I OUT
DC output current, per pin
–25
25
mA
T STG
Storage temperature
No bias
–65
150
°C
T AMB
Ambient temperature
Under bias
–65
135
°C
TJ
Junction temperature
Ceramic packages, under bias
150
°C
PQFP and RQFP, under bias
135
°C
Altera Corporation
With respect to ground (2)
Min
27
3
FLEX 8000
Table 9. FLEX 8000 5.0-V Device Absolute Maximum Ratings
Symbol
VCC
FLEX 8000 Programmable Logic Device Family Data Sheet
Table 10. FLEX 8000 5.0-V Device Recommended Operating Conditions
Symbol
Parameter
Conditions
V CCINT Supply voltage for internal logic (3), (4)
and input buffers
V CCIO
Min
Max
Unit
4.75 (4.50)
5.25 (5.50)
V
Supply voltage for output
buffers, 5.0-V operation
(3), (4)
4.75 (4.50)
5.25 (5.50)
V
Supply voltage for output
buffers, 3.3-V operation
(3), (4)
3.00 (3.00)
3.60 (3.60)
V
–0.5
V CCINT + 0.5
V
0
V CCIO
V
VI
Input voltage
VO
Output voltage
TA
Operating temperature
For commercial use
For industrial use
0
70
°C
–40
85
°C
tR
Input rise time
40
ns
tF
Input fall time
40
ns
Max
Unit
Table 11. FLEX 8000 5.0-V Device DC Operating Conditions
Symbol
Parameter
Conditions
Notes (5), (6)
Min
Typ
V IH
High-level input voltage
2.0
V CCINT + 0.5
V
V IL
Low-level input voltage
–0.5
0.8
V
V OH
5.0-V high-level TTL output
voltage
I OH = –4 mA DC (7)
V CCIO = 4.75 V
2.4
V
3.3-V high-level TTL output
voltage
I OH = –4 mA DC (7)
V CCIO = 3.00 V
2.4
V
VCCIO – 0.2
V
3.3-V high-level CMOS output I OH = –0.1 mA DC (7)
V CCIO = 3.00 V
voltage
V OL
5.0-V low-level TTL output
voltage
I OL = 12 mA DC (7)
V CCIO = 4.75 V
0.45
V
3.3-V low-level TTL output
voltage
I OL = 12 mA DC (7)
V CCIO = 3.00 V
0.45
V
3.3-V low-level CMOS output I OL = 0.1 mA DC (7)
V CCIO = 3.00 V
voltage
0.2
V
II
Input leakage current
V I = V CC or ground
–10
10
µA
I OZ
Tri-state output off-state
current
V O = V CC or ground
–40
40
µA
I CC0
V CC supply current (standby) V I = ground, no load
10
mA
28
0.5
Altera Corporation
FLEX 8000 Programmable Logic Device Family Data Sheet
Table 12. FLEX 8000 5.0-V Device Capacitance
Symbol
Parameter
Note (8)
Conditions
Min
Max
Unit
C IN
Input capacitance
V IN = 0 V, f = 1.0 MHz
10
pF
C OUT
Output capacitance
V OUT = 0 V, f = 1.0 MHz
10
pF
Notes to tables:
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
See the Operating Requirements for Altera Devices Data Sheet.
Minimum DC input is –0.5 V. During transitions, the inputs may undershoot to –2.0 V or overshoot to 7.0 V for input
currents less than 100 mA and periods shorter than 20 ns.
The maximum V CC rise time is 100 ms.
Numbers in parentheses are for industrial-temperature-range devices.
Typical values are for T A = 25° C and V CC = 5.0 V.
These values are specified in Table 10 on page 28.
The I OH parameter refers to high-level TTL or CMOS output current; the IOL parameter refers to low-level TTL or
CMOS output current.
Capacitance is sample-tested only.
Tables 13 through 16 provide information on absolute maximum ratings,
recommended operating conditions, operating conditions, and
capacitance for 3.3-V FLEX 8000 devices.
Symbol
Parameter
Note (1)
Conditions
With respect to ground (2)
Min
Max
Unit
V
V CC
Supply voltage
–2.0
5.3
VI
DC input voltage
–2.0
5.3
V
I OUT
DC output current, per pin
–25
25
mA
T STG
Storage temperature
No bias
–65
150
°C
T AMB
Ambient temperature
Under bias
–65
135
°C
TJ
Junction temperature
Plastic packages, under bias
135
°C
Min
Max
Unit
3.0
3.6
V
–0.3
V CC + 0.3
V
0
V CC
V
0
Table 14. FLEX 8000 3.3-V Device Recommended Operating Conditions
Symbol
Parameter
V CC
Supply voltage
Conditions
(3)
VI
Input voltage
VO
Output voltage
TA
Operating temperature
70
°C
tR
Input rise time
40
ns
tF
Input fall time
40
ns
Altera Corporation
For commercial use
29
FLEX 8000
Table 13. FLEX 8000 3.3-V Device Absolute Maximum Ratings
3
FLEX 8000 Programmable Logic Device Family Data Sheet
Table 15. FLEX 8000 3.3-V Device DC Operating Conditions
Symbol
Parameter
Note (4)
Conditions
Min
Typ
Max
Unit
V
V IH
High-level input voltage
2.0
V CC + 0.3
V IL
Low-level input voltage
–0.3
0.8
V OH
High-level output voltage
I OH = –0.1 mA DC (5)
V OL
Low-level output voltage
I OL = 4 mA DC (5)
II
Input leakage current
V I = V CC or ground
I OZ
Tri-state output off-state current V O = V CC or ground
I CC0
V CC supply current (standby)
V I = ground, no load (6)
Table 16. FLEX 8000 3.3-V Device Capacitance
Symbol
Parameter
V CC – 0.2
V
V
0.45
V
–10
10
µA
–40
40
µA
0.3
10
mA
Min
Note (7)
Max
Unit
C IN
Input capacitance
V IN = 0 V, f = 1.0 MHz
Conditions
10
pF
C OUT
Output capacitance
V OUT = 0 V, f = 1.0 MHz
10
pF
Notes to tables:
(1)
(2)
(3)
(4)
(5)
(6)
(7)
See the Operating Requirements for Altera Devices Data Sheet.
Minimum DC input voltage is –0.3 V. During transitions, the inputs may undershoot to –2.0 V or overshoot to 5.3 V
for input currents less than 100 mA and periods shorter than 20 ns.
The maximum VCC rise time is 100 ms. VCC must rise monotonically.
These values are specified in Table 14 on page 29.
The IOH parameter refers to high-level TTL output current; the IOL parameter refers to low-level TTL output current.
Typical values are for TA = 25° C and VCC = 3.3 V.
Capacitance is sample-tested only.
Figure 16 shows the typical output drive characteristics of 5.0-V
FLEX 8000 devices. The output driver is compliant with PCI Local Bus
Specification, Revision 2.2.
30
Altera Corporation
FLEX 8000 Programmable Logic Device Family Data Sheet
Figure 16. Output Drive Characteristics of 5.0-V FLEX 8000 Devices (Except EPF8282A)
200
200
IOL
150
VCCINT = 5.0 V
VCCIO = 5.0 V
Room Temperature
100
Typical IO
Output
Current (mA)
1
2
VCCINT = 5.0 V
VCCIO = 3.3 V
Room Temperature
100
IOH
IOH
50
IOL
15 0
Typical IO
Output
Current (mA)
50
3
4
1
5
Output Voltage (V)
2
3
4
Output Voltage (V)
Figure 17 shows the typical output drive characteristics of 5.0-V
EPF8282A devices. The output driver is compliant with PCI Local Bus
Specification, Revision 2.2.
3
150
IOL
120
VCC = 5.0 V
Room Temperature
Typical IO
90
Output
Current (mA)
IOH
60
30
1
2
3
4
5
Output Voltage (V)
Figure 18 shows the typical output drive characteristics of EPF8282AV
devices.
Altera Corporation
31
FLEX 8000
Figure 17. Output Drive Characteristics of EPF8282A Devices with 5.0-V V CCIO
FLEX 8000 Programmable Logic Device Family Data Sheet
Figure 18. Output Drive Characteristics of EPF8282AV Devices
100
IOL
75
Typical IO
Output
50
Current (mA)
VCC = 3.3 V
Room Temperature
IOH
25
1
2
3
4
Output Voltage (V)
Timing Model
The continuous, high-performance FastTrack Interconnect routing
structure ensures predictable performance and accurate simulation and
timing analysis. This predictable performance contrasts with that of
FPGAs, which use a segmented connection scheme and hence have
unpredictable performance. Timing simulation and delay prediction are
available with the MAX+PLUS II Simulator and Timing Analyzer, or with
industry-standard EDA tools. The Simulator offers both pre-synthesis
functional simulation to evaluate logic design accuracy and postsynthesis timing simulation with 0.1-ns resolution. The Timing Analyzer
provides point-to-point timing delay information, setup and hold time
prediction, and device-wide performance analysis.
Tables 17 through 20 describe the FLEX 8000 timing parameters and their
symbols.
32
Altera Corporation
FLEX 8000 Programmable Logic Device Family Data Sheet
Table 17. FLEX 8000 Internal Timing Parameters
Symbol
Note (1)
Parameter
IOE register data delay
IOE register control signal delay
t IOE
Output enable delay
t IOCO
IOE register clock-to-output delay
t IOCOMB
IOE combinatorial delay
t IOSU
IOE register setup time before clock; IOE register recovery time after asynchronous clear
t IOH
IOE register hold time after clock
t IOCLR
IOE register clear delay
t IN
Input pad and buffer delay
t OD1
Output buffer and pad delay, slow slew rate = off, V CCIO = 5.0 V C1 = 35 pF (2)
t OD2
Output buffer and pad delay, slow slew rate = off, V CCIO = 3.3 V C1 = 35 pF (2)
t OD3
Output buffer and pad delay, slow slew rate = on, C1 = 35 pF (3)
t XZ
Output buffer disable delay, C1 = 5 pF
t ZX1
Output buffer enable delay, slow slew rate = off, V CCIO = 5.0 V, C1 = 35 pF (2)
t ZX2
Output buffer enable delay, slow slew rate = off, V CCIO = 3.3 V, C1 = 35 pF (2)
t ZX3
Output buffer enable delay, slow slew rate = on, C1 = 35 pF (3)
Table 18. FLEX 8000 LE Timing Parameters
3
FLEX 8000
t IOD
t IOC
Note (1)
Symbol
Parameter
t LUT
LUT delay for data-in
t CLUT
LUT delay for carry-in
t RLUT
LUT delay for LE register feedback
t GATE
Cascade gate delay
t CASC
Cascade chain routing delay
t CICO
Carry-in to carry-out delay
t CGEN
Data-in to carry-out delay
t CGENR
LE register feedback to carry-out delay
tC
LE register control signal delay
t CH
LE register clock high time
t CL
LE register clock low time
t CO
LE register clock-to-output delay
t COMB
Combinatorial delay
t SU
LE register setup time before clock; LE register recovery time after asynchronous preset, clear, or
load
tH
LE register hold time after clock
t PRE
LE register preset delay
t CLR
LE register clear delay
Altera Corporation
33
FLEX 8000 Programmable Logic Device Family Data Sheet
Table 19. FLEX 8000 Interconnect Timing Parameters
Symbol
Note (1)
Parameter
t LABCASC
Cascade delay between LEs in different LABs
t LABCARRY
Carry delay between LEs in different LABs
t LOCAL
LAB local interconnect delay
t ROW
Row interconnect routing delay (4)
t COL
Column interconnect routing delay
t DIN_C
Dedicated input to LE control delay
t DIN_D
Dedicated input to LE data delay (4)
t DIN_IO
Dedicated input to IOE control delay
Table 20. FLEX 8000 External Reference Timing Characteristics
Symbol
Note (5)
Parameter
t DRR
Register-to-register delay via 4 LEs, 3 row interconnects, and 4 local interconnects (6)
tODH
Output data hold time after clock (7)
Notes to tables:
(1)
(2)
(3)
(4)
(5)
(6)
(7)
Internal timing parameters cannot be measured explicitly. They are worst-case delays based on testable and
external parameters specified by Altera. Internal timing parameters should be used for estimating device
performance. Post-compilation timing simulation or timing analysis is required to determine actual worst-case
performance.
These values are specified in Table 10 on page 28 or Table 14 on page 29.
For the tOD3 and tZX3 parameters, VCCIO = 3.3 V or 5.0 V.
The t ROW and t DIN_D delays are worst-case values for typical applications. Post-compilation timing simulation or
timing analysis is required to determine actual worst-case performance.
External reference timing characteristics are factory-tested, worst-case values specified by Altera. A representative
subset of signal paths is tested to approximate typical device applications.
For more information on test conditions, see Application Note 76 (Understanding FLEX 8000 Timing).
This parameter is a guideline that is sample-tested only and is based on extensive device characterization. This
parameter applies to global and non-global clocking, and for LE and I/O element registers.
The FLEX 8000 timing model shows the delays for various paths and
functions in the circuit. See Figure 19. This model contains three distinct
parts: the LE; the IOE; and the interconnect, including the row and column
FastTrack Interconnect, LAB local interconnect, and carry and cascade
interconnect paths. Each parameter shown in Figure 19 is expressed as a
worst-case value in Tables 22 through 49. Hand-calculations that use the
FLEX 8000 timing model and these timing parameters can be used to
estimate FLEX 8000 device performance. Timing simulation or timing
analysis after compilation is required to determine the final worst-case
performance. Table 21 summarizes the interconnect paths shown in
Figure 19.
f
34
For more information on timing parameters, go to Application Note 76
(Understanding FLEX 8000 Timing).
Altera Corporation
Carry-In from
Previous LE
Cascade-In from
Previous LE
LE
LUT Delay
Cascade
Gate Delay
Register
Delays
tGATE
tCO
tCOMB
tSU
tH
tPRE
tCLR
IOE
Output Data
Delay
I/O Register
Delays
Output
Delays
tIOCO
tIOCOMB
tIOSU
tIOH
tIOCLR
tOD1
tOD2
tOD3
tXZ
tZX1
tZX2
tZX3
tLUT
tRLUT
tCLUT
tLOCAL
Carry Chain
Delay
tCGEN
tIOD
LE-Out
I/O Register
Control
tIOC
tCOL
tIOE
tCICO
Input
Delay
Register
Control
tIN
tC
tCASC
Cascade
Routing Delay
Data-In
Dedicated
Input Delays
tDIN_D
tLABCARRY
tLABCASC
tDIN_C
tDIN_IO
Carry-Out
to Next LE
in Same
LAB
Carry-Out
to Next LE
in Next
LAB
Cascade-Out Cascade-Out
to Next LE in to Next LE in
Same LAB
Next LAB
35
FLEX 8000 Programmable Logic Device Family Data Sheet
tCGENR
I/O Pin
Figure 19. FLEX 8000 Timing Model
Altera Corporation
tROW
3
FLEX 8000
FLEX 8000 Programmable Logic Device Family Data Sheet
Table 21. FLEX 8000 Timing Model Interconnect Paths
Source
Destination
Total Delay
LE-Out
LE in same LAB
t LOCAL
LE-Out
LE in same row, different LAB
t ROW + t LOCAL
LE-Out
LE in different row
t COL + t ROW + t LOCAL
LE-Out
IOE on column
t COL
LE-Out
IOE on row
t ROW
IOE on row
LE in same row
t ROW + t LOCAL
IOE on column
Any LE
t COL + t ROW + t LOCAL
Tables 22 through 49 show the FLEX 8000 internal and external timing
parameters.
Table 22. EPF8282A Internal I/O Element Timing Parameters
Symbol
Speed Grade
A-2
Min
Unit
A-3
Max
Min
A-4
Max
Min
Max
t IOD
0.7
0.8
0.9
ns
t IOC
1.7
1.8
1.9
ns
t IOE
1.7
1.8
1.9
ns
tIOCO
1.0
1.0
1.0
ns
t IOCOMB
0.3
0.2
0.1
ns
t IOSU
1.4
1.6
1.8
t IOH
0.0
0.0
0.0
ns
ns
t IOCLR
1.2
1.2
1.2
ns
t IN
1.5
1.6
1.7
ns
t OD1
1.1
1.4
1.7
ns
t OD2
–
–
–
ns
t OD3
4.6
4.9
5.2
ns
t XZ
1.4
1.6
1.8
ns
t ZX1
1.4
1.6
1.8
ns
t ZX2
–
–
–
ns
t ZX3
4.9
5.1
5.3
ns
36
Altera Corporation
FLEX 8000 Programmable Logic Device Family Data Sheet
Table 23. EPF8282A Interconnect Timing Parameters
Symbol
Speed Grade
A-2
Min
Unit
A-3
Max
Min
A-4
Max
Min
Max
t LABCASC
0.3
0.3
0.4
ns
t LABCARRY
0.3
0.3
0.4
ns
t LOCAL
0.5
0.6
0.8
ns
t ROW
4.2
4.2
4.2
ns
t COL
2.5
2.5
2.5
ns
t DIN_C
5.0
5.0
5.5
ns
t DIN_D
7.2
7.2
7.2
ns
t DIN_IO
5.0
5.0
5.5
ns
3
FLEX 8000
Altera Corporation
37
FLEX 8000 Programmable Logic Device Family Data Sheet
Table 24. EPF8282A LE Timing Parameters
Symbol
Speed Grade
A-2
Min
Unit
A-3
Max
Min
A-4
Max
Min
Max
t LUT
2.0
2.5
3.2
ns
t CLUT
0.0
0.0
0.0
ns
t RLUT
0.9
1.1
1.5
ns
t GATE
0.0
0.0
0.0
ns
t CASC
0.6
0.7
0.9
ns
t CICO
0.4
0.5
0.6
ns
t CGEN
0.4
0.5
0.7
ns
t CGENR
0.9
1.1
1.5
ns
tC
1.6
2.0
2.5
ns
t CH
4.0
4.0
4.0
t CL
4.0
4.0
4.0
t CO
0.4
ns
0.5
0.4
t COMB
ns
0.5
t SU
0.8
1.1
1.2
tH
0.9
1.1
1.5
0.6
ns
0.6
ns
ns
ns
t PRE
0.6
0.7
0.8
ns
t CLR
0.6
0.7
0.8
ns
Table 25. EPF8282A External Timing Parameters
Symbol
Speed Grade
A-2
Min
t DRR
t ODH
38
A-3
Max
Min
15.8
1.0
Unit
A-4
Max
Min
19.8
1.0
Max
24.8
1.0
ns
ns
Altera Corporation
FLEX 8000 Programmable Logic Device Family Data Sheet
Table 26. EPF8282AV I/O Element Timing Parameters
Symbol
Speed Grade
A-3
Min
Unit
A-4
Max
Min
Max
tIOD
0.9
2.2
ns
tIOC
1.9
2.0
ns
tIOE
1.9
2.0
ns
tIOCO
1.0
2.0
ns
tIOCOMB
0.1
0.0
ns
tIOSU
1.8
2.8
ns
tIOH
0.0
0.2
ns
1.2
2.3
ns
1.7
3.4
ns
tOD1
1.7
4.1
ns
tOD2
–
–
ns
tOD3
5.2
7.1
ns
tXZ
1.8
4.3
ns
tZX1
1.8
4.3
ns
tZX2
–
–
ns
tZX3
5.3
8.3
ns
3
FLEX 8000
tIOCLR
tIN
Table 27. EPF8282AV Interconnect Timing Parameters
Symbol
Speed Grade
A-3
Min
Altera Corporation
Unit
A-4
Max
Min
Max
tLABCASC
0.4
1.3
ns
tLABCARRY
0.4
0.8
ns
tLOCAL
0.8
1.5
ns
tROW
4.2
6.3
ns
tCOL
2.5
3.8
ns
tDIN_C
5.5
8.0
ns
tDIN_D
7.2
10.8
ns
tDIN_IO
5.5
9.0
ns
39
FLEX 8000 Programmable Logic Device Family Data Sheet
Table 28. EPF8282AV Logic Element Timing Parameters
Symbol
Unit
Speed Grade
A-3
Min
A-4
Max
Min
Max
tLUT
3.2
7.3
ns
tCLUT
0.0
1.4
ns
tRLUT
1.5
5.1
ns
tGATE
0.0
0.0
ns
tCASC
0.9
2.8
ns
tCICO
0.6
1.5
ns
tCGEN
0.7
2.2
ns
tCGENR
1.5
3.7
ns
4.7
ns
2.5
tC
tCH
4.0
6.0
tCL
4.0
6.0
ns
ns
tCO
0.6
0.9
ns
tCOMB
0.6
0.9
ns
tSU
1.2
2.4
ns
tH
1.5
4.6
ns
tPRE
0.8
1.3
ns
tCLR
0.8
1.3
ns
Table 29. EPF8282AV External Timing Parameters
Symbol
Speed Grade
A-3
Min
tDRR
tODH
40
A-4
Max
Min
24.8
1.0
Unit
Max
50.1
1.0
ns
ns
Altera Corporation
FLEX 8000 Programmable Logic Device Family Data Sheet
Table 30. EPF8452A I/O Element Timing Parameters
Symbol
Unit
Speed Grade
A-2
Min
A-3
Max
Min
A-4
Max
Min
Max
t IOD
0.7
0.8
0.9
ns
t IOC
1.7
1.8
1.9
ns
t IOE
1.7
1.8
1.9
ns
t IOCO
1.0
1.0
1.0
ns
t IOCOMB
0.3
0.2
0.1
t IOSU
1.4
t IOH
0.0
1.6
1.8
0.0
ns
ns
0.0
ns
1.2
1.2
1.2
ns
t IN
1.5
1.6
1.7
ns
t OD1
1.1
1.4
1.7
ns
t OD2
–
–
–
ns
t OD3
4.6
4.9
5.2
ns
t XZ
1.4
1.6
1.8
ns
t ZX1
1.4
1.6
1.8
ns
t ZX2
–
–
–
ns
t ZX3
4.9
5.1
5.3
ns
Table 31. EPF8452A Interconnect Timing Parameters
Symbol
Speed Grade
A-2
Min
Unit
A-3
Max
Min
A-4
Max
Min
Max
t LABCASC
0.3
0.4
0.4
ns
t LABCARRY
0.3
0.4
0.4
ns
t LOCAL
0.5
0.5
0.7
ns
t ROW
5.0
5.0
5.0
ns
t COL
3.0
3.0
3.0
ns
t DIN_C
5.0
5.0
5.5
ns
t DIN_D
7.0
7.0
7.5
ns
t DIN_IO
5.0
5.0
5.5
ns
Altera Corporation
41
3
FLEX 8000
t IOCLR
FLEX 8000 Programmable Logic Device Family Data Sheet
Table 32. EPF8452A LE Timing Parameters
Symbol
Speed Grade
A-2
Min
Unit
A-3
Max
Min
A-4
Max
Min
Max
t LUT
2.0
2.3
3.0
ns
t CLUT
0.0
0.2
0.1
ns
t RLUT
0.9
1.6
1.6
ns
t GATE
0.0
0.0
0.0
ns
t CASC
0.6
0.7
0.9
ns
t CICO
0.4
0.5
0.6
ns
t CGEN
0.4
0.9
0.8
ns
t CGENR
0.9
1.4
1.5
ns
tC
1.6
1.8
2.4
ns
t CH
4.0
4.0
4.0
t CL
4.0
4.0
4.0
ns
ns
t CO
0.4
0.5
0.6
ns
t COMB
0.4
0.5
0.6
ns
t SU
0.8
1.0
1.1
ns
tH
0.9
1.1
1.4
ns
t PRE
0.6
0.7
0.8
ns
t CLR
0.6
0.7
0.8
ns
Table 33. EPF8452A External Timing Parameters
Symbol
Speed Grade
A-2
Min
t DRR
tODH
42
A-3
Max
Min
16.0
1.0
Unit
A-4
Max
Min
20.0
1.0
Max
25.0
1.0
ns
ns
Altera Corporation
FLEX 8000 Programmable Logic Device Family Data Sheet
Table 34. EPF8636A I/O Element Timing Parameters
Symbol
Speed Grade
A-2
Min
Unit
A-3
Max
Min
A-4
Max
Min
Max
t IOD
0.7
0.8
0.9
ns
t IOC
1.7
1.8
1.9
ns
t IOE
1.7
1.8
1.9
ns
t IOCO
1.0
1.0
1.0
ns
t IOCOMB
0.3
0.2
0.1
ns
t IOSU
1.4
1.6
1.8
ns
t IOH
0.0
0.0
0.0
ns
1.2
1.2
1.2
ns
1.5
1.6
1.7
ns
t OD1
1.1
1.4
1.7
ns
t OD2
1.6
1.9
2.2
ns
t OD3
4.6
4.9
5.2
ns
t XZ
1.4
1.6
1.8
ns
t ZX1
1.4
1.6
1.8
ns
t ZX2
1.9
2.1
2.3
ns
t ZX3
4.9
5.1
5.3
ns
Table 35. EPF8636A Interconnect Timing Parameters
Symbol
Unit
Speed Grade
A-2
Min
A-3
Max
Min
A-4
Max
Min
Max
t LABCASC
0.3
0.4
0.4
ns
t LABCARRY
0.3
0.4
0.4
ns
t LOCAL
0.5
0.5
0.7
ns
t ROW
5.0
5.0
5.0
ns
t COL
3.0
3.0
3.0
ns
t DIN_C
5.0
5.0
5.5
ns
t DIN_D
7.0
7.0
7.5
ns
t DIN_IO
5.0
5.0
5.5
ns
Altera Corporation
43
3
FLEX 8000
t IOCLR
t IN
FLEX 8000 Programmable Logic Device Family Data Sheet
Table 36. EPF8636A LE Timing Parameters
Symbol
Speed Grade
A-2
Min
Unit
A-3
Max
Min
A-4
Max
Min
Max
t LUT
2.0
2.3
3.0
ns
t CLUT
0.0
0.2
0.1
ns
t RLUT
0.9
1.6
1.6
ns
t GATE
0.0
0.0
0.0
ns
t CASC
0.6
0.7
0.9
ns
t CICO
0.4
0.5
0.6
ns
t CGEN
0.4
0.9
0.8
ns
t CGENR
0.9
1.4
1.5
ns
tC
1.6
1.8
2.4
ns
t CH
4.0
4.0
4.0
t CL
4.0
4.0
4.0
ns
ns
t CO
0.4
0.5
0.6
ns
t COMB
0.4
0.5
0.6
ns
t SU
0.8
1.0
1.1
ns
tH
0.9
1.1
1.4
ns
t PRE
0.6
0.7
0.8
ns
t CLR
0.6
0.7
0.8
ns
Table 37. EPF8636A External Timing Parameters
Symbol
Speed Grade
A-2
Min
t DRR
tODH
44
A-3
Max
Min
16.0
1.0
Unit
A-4
Max
Min
20.0
1.0
Max
25.0
1.0
ns
ns
Altera Corporation
FLEX 8000 Programmable Logic Device Family Data Sheet
Table 38. EPF8820A I/O Element Timing Parameters
Symbol
Speed Grade
A-2
Min
Unit
A-3
Max
Min
A-4
Max
Min
Max
t IOD
0.7
0.8
0.9
ns
t IOC
1.7
1.8
1.9
ns
t IOE
1.7
1.8
1.9
ns
t IOCO
1.0
1.0
1.0
ns
t IOCOMB
0.3
0.2
0.1
ns
t IOSU
1.4
1.6
1.8
ns
t IOH
0.0
0.0
0.0
ns
1.2
1.2
1.2
ns
1.5
1.6
1.7
ns
t OD1
1.1
1.4
1.7
ns
t OD2
1.6
1.9
2.2
ns
t OD3
4.6
4.9
5.2
ns
t XZ
1.4
1.6
1.8
ns
t ZX1
1.4
1.6
1.8
ns
t ZX2
1.9
2.1
2.3
ns
t ZX3
4.9
5.1
5.3
ns
3
FLEX 8000
t IOCLR
t IN
Table 39. EPF8820A Interconnect Timing Parameters
Symbol
Speed Grade
A-2
Min
Unit
A-3
Max
Min
A-4
Max
Min
Max
t LABCASC
0.3
0.3
0.4
ns
t LABCARRY
0.3
0.3
0.4
ns
t LOCAL
0.5
0.6
0.8
ns
t ROW
5.0
5.0
5.0
ns
t COL
3.0
3.0
3.0
ns
t DIN_C
5.0
5.0
5.5
ns
t DIN_D
7.0
7.0
7.5
ns
t DIN_IO
5.0
5.0
5.5
ns
Altera Corporation
45
FLEX 8000 Programmable Logic Device Family Data Sheet
Table 40. EPF8820A LE Timing Parameters
Symbol
Unit
Speed Grade
A-2
Min
A-3
Max
Min
A-4
Max
Min
Max
t LUT
2.0
2.5
3.2
ns
t CLUT
0.0
0.0
0.0
ns
t RLUT
0.9
1.1
1.5
ns
t GATE
0.0
0.0
0.0
ns
t CASC
0.6
0.7
0.9
ns
t CICO
0.4
0.5
0.6
ns
t CGEN
0.4
0.5
0.7
ns
t CGENR
0.9
1.1
1.5
ns
2.5
ns
1.6
tC
2.0
t CH
4.0
4.0
4.0
t CL
4.0
4.0
4.0
ns
ns
t CO
0.4
0.5
0.6
ns
t COMB
0.4
0.5
0.6
ns
t SU
0.8
1.1
1.2
tH
0.9
1.1
1.5
ns
ns
t PRE
0.6
0.7
0.8
ns
t CLR
0.6
0.7
0.8
ns
Table 41. EPF8820A External Timing Parameters
Symbol
Speed Grade
A-2
Min
t DRR
tODH
46
A-3
Max
Min
16.0
1.0
Unit
A-4
Max
Min
20.0
1.0
Max
25.0
1.0
ns
ns
Altera Corporation
FLEX 8000 Programmable Logic Device Family Data Sheet
Table 42. EPF81188A I/O Element Timing Parameters
Symbol
Speed Grade
A-2
Min
Unit
A-3
Max
Min
A-4
Max
Min
Max
t IOD
0.7
0.8
0.9
ns
t IOC
1.7
1.8
1.9
ns
t IOE
1.7
1.8
1.9
ns
t IOCO
1.0
1.0
1.0
ns
t IOCOMB
0.3
0.2
0.1
ns
t IOSU
1.4
1.6
1.8
ns
t IOH
0.0
0.0
0.0
ns
1.2
1.2
1.2
ns
1.5
1.6
1.7
ns
t OD1
1.1
1.4
1.7
ns
t OD2
1.6
1.9
2.2
ns
t OD3
4.6
4.9
5.2
ns
t XZ
1.4
1.6
1.8
ns
t ZX1
1.4
1.6
1.8
ns
t ZX2
1.9
2.1
2.3
ns
t ZX3
4.9
5.1
5.3
ns
3
FLEX 8000
t IOCLR
t IN
Table 43. EPF81188A Interconnect Timing Parameters
Symbol
Speed Grade
A-2
Min
Unit
A-3
Max
Min
A-4
Max
Min
Max
t LABCASC
0.3
0.3
0.4
ns
t LABCARRY
0.3
0.3
0.4
ns
t LOCAL
0.5
0.6
0.8
ns
t ROW
5.0
5.0
5.0
ns
t COL
3.0
3.0
3.0
ns
t DIN_C
5.0
5.0
5.5
ns
t DIN_D
7.0
7.0
7.5
ns
t DIN_IO
5.0
5.0
5.5
ns
Altera Corporation
47
FLEX 8000 Programmable Logic Device Family Data Sheet
Table 44. EPF81188A LE Timing Parameters
Symbol
Speed Grade
A-2
Min
Unit
A-3
Max
Min
A-4
Max
Min
Max
t LUT
2.0
2.5
3.2
ns
t CLUT
0.0
0.0
0.0
ns
t RLUT
0.9
1.1
1.5
ns
t GATE
0.0
0.0
0.0
ns
t CASC
0.6
0.7
0.9
ns
t CICO
0.4
0.5
0.6
ns
t CGEN
0.4
0.5
0.7
ns
t CGENR
0.9
1.1
1.5
ns
tC
1.6
2.0
2.5
ns
t CH
4.0
4.0
4.0
t CL
4.0
4.0
4.0
ns
ns
t CO
0.4
0.5
0.6
ns
t COMB
0.4
0.5
0.6
ns
t SU
0.8
1.1
1.2
ns
tH
0.9
1.1
1.5
ns
t PRE
0.6
0.7
0.8
ns
t CLR
0.6
0.7
0.8
ns
Table 45. EPF81188A External Timing Parameters
Symbol
Speed Grade
A-2
Min
t DRR
t ODH
48
A-3
Max
Min
16.0
1.0
Unit
A-4
Max
Min
20.0
1.0
Max
25.0
1.0
ns
ns
Altera Corporation
FLEX 8000 Programmable Logic Device Family Data Sheet
Table 46. EPF81500A I/O Element Timing Parameters
Symbol
Speed Grade
A-2
Min
Unit
A-3
Max
Min
A-4
Max
Min
Max
t IOD
0.7
0.8
0.9
ns
t IOC
1.7
1.8
1.9
ns
t IOE
1.7
1.8
1.9
ns
t IOCO
1.0
1.0
1.0
ns
t IOCOMB
0.3
0.2
0.1
ns
t IOSU
1.4
1.6
1.8
ns
t IOH
0.0
0.0
0.0
ns
1.2
1.2
1.2
ns
t IN
1.5
1.6
1.7
ns
t OD1
1.1
1.4
1.7
ns
t OD2
1.6
1.9
2.2
ns
t OD3
4.6
4.9
5.2
ns
t XZ
1.4
1.6
1.8
ns
t ZX1
1.4
1.6
1.8
ns
t ZX2
1.9
2.1
2.3
ns
t ZX3
4.9
5.1
5.3
ns
3
FLEX 8000
t IOCLR
Table 47. EPF81500A Interconnect Timing Parameters
Symbol
Speed Grade
A-2
Min
Unit
A-3
Max
Min
A-4
Max
Min
Max
t LABCASC
0.3
0.3
0.4
ns
t LABCARRY
0.3
0.3
0.4
ns
t LOCAL
0.5
0.6
0.8
ns
t ROW
6.2
6.2
6.2
ns
t COL
3.0
3.0
3.0
ns
t DIN_C
5.0
5.0
5.5
ns
t DIN_D
8.2
8.2
8.7
ns
t DIN_IO
5.0
5.0
5.5
ns
Altera Corporation
49
FLEX 8000 Programmable Logic Device Family Data Sheet
Table 48. EPF81500A LE Timing Parameters
Symbol
Speed Grade
A-2
Min
Unit
A-3
Max
Min
A-4
Max
Min
Max
t LUT
2.0
2.5
3.2
ns
t CLUT
0.0
0.0
0.0
ns
t RLUT
0.9
1.1
1.5
ns
t GATE
0.0
0.0
0.0
ns
t CASC
0.6
0.7
0.9
ns
t CICO
0.4
0.5
0.6
ns
t CGEN
0.4
0.5
0.7
ns
t CGENR
0.9
1.1
1.5
ns
tC
1.6
2.0
2.5
ns
t CH
4.0
4.0
4.0
t CL
4.0
4.0
4.0
t CO
0.4
ns
0.5
0.4
t COMB
ns
0.5
t SU
0.8
1.1
1.2
tH
0.9
1.1
1.5
0.6
ns
0.6
ns
ns
ns
t PRE
0.6
0.7
0.8
ns
t CLR
0.6
0.7
0.8
ns
Table 49. EPF81500A External Timing Parameters
Symbol
Speed Grade
A-2
Min
t DRR
t ODH
50
A-3
Max
Min
16.1
1.0
Unit
A-4
Max
Min
20.1
1.0
Max
25.1
1.0
ns
ns
Altera Corporation
FLEX 8000 Programmable Logic Device Family Data Sheet
Power
Consumption
The supply power (P) for FLEX 8000 devices can be calculated with the
following equation:
P = PINT + PIO = [(I CCSTANDBY + I CCACTIVE) × VCC] + PIO
Typical I CCSTANDBY values are shown as I CC0 in Table 11 on page 28 and
Table 15 on page 30. The PIO value, which depends on the device output
load characteristics and switching frequency, can be calculated using the
guidelines given in Application Note 74 (Evaluating Power for Altera
Devices). The ICCACTIVE value depends on the switching frequency and
the application logic. This value can be calculated based on the amount of
current that each LE typically consumes.
The following equation shows the general formula for calculating
ICCACTIVE:
µA
ICC AC TIVE = K × f MAX × N × togLC × ---------------------------MHz × LE
The parameters in this equation are shown below:
=
=
=
=
3
Maximum operating frequency in MHz
Total number of logic cells used in the device
Average percentage of logic cells toggling at each clock
Constant, shown in Table 50
FLEX 8000
fMAX
N
togLC
K
Table 50. Values for Constant K
Device
K
5.0-V FLEX 8000 devices
75
3.3-V FLEX 8000 devices
60
This calculation provides an I CC estimate based on typical conditions
with no output load. The actual I CC value should be verified during
operation because this measurement is sensitive to the actual pattern in
the device and the environmental operating conditions.
Figure 20 shows the relationship between I CC and operating frequency
for several LE utilization values.
Altera Corporation
51
FLEX 8000 Programmable Logic Device Family Data Sheet
Figure 20. FLEX 8000 I CCACTIVE vs. Operating Frequency
5.0-V FLEX 8000 Devices
1,000
1,500 LEs
800
600
1,000 LEs
ICC Supply
Current (mA)
400
500 LEs
200
0
30
60
Frequency (MHz)
3.3-V FLEX 8000 Devices
100
200 LEs
90
80
70
150 LEs
60
ICC Supply
Current (mA)
50
100 LEs
40
30
50 LEs
20
10
0
30
60
Frequency (MHz)
Configuration &
Operation
f
52
The FLEX 8000 architecture supports several configuration schemes to
load a design into the device(s) on the circuit board. This section
summarizes the device operating modes and available device
configuration schemes.
For more information, go to Application Note 33 (Configuring FLEX 8000
Devices) and Application Note 38 (Configuring Multiple FLEX 8000 Devices).
Altera Corporation
FLEX 8000 Programmable Logic Device Family Data Sheet
Operating Modes
The FLEX 8000 architecture uses SRAM elements that require
configuration data to be loaded whenever the device powers up and
begins operation. The process of physically loading the SRAM
programming data into the device is called configuration. During
initialization, which occurs immediately after configuration, the device
resets registers, enables I/O pins, and begins to operate as a logic device.
The I/O pins are tri-stated during power-up, and before and during
configuration. The configuration and initialization processes together are
called command mode; normal device operation is called user mode.
SRAM elements allow FLEX 8000 devices to be reconfigured in-circuit
with new programming data that is loaded into the device. Real-time
reconfiguration is performed by forcing the device into command mode
with a device pin, loading different programming data, reinitializing the
device, and resuming user-mode operation. The entire reconfiguration
process requires less than 100 ms and can be used to dynamically
reconfigure an entire system. In-field upgrades can be performed by
distributing new configuration files.
The configuration data for a FLEX 8000 device can be loaded with one of
six configuration schemes, chosen on the basis of the target application.
Both active and passive schemes are available. In the active configuration
schemes, the FLEX 8000 device functions as the controller, directing the
loading operation, controlling external configuration devices, and
completing the loading process. The clock source for all active
configuration schemes is an oscillator on the FLEX 8000 device that
operates between 2 MHz and 6 MHz. In the passive configuration
schemes, an external controller guides the FLEX 8000 device. Table 51
shows the data source for each of the six configuration schemes.
Table 51. Data Source for Configuration
Configuration Scheme
Altera Corporation
Acronym
Data Source
Active serial
AS
Altera configuration device
Active parallel up
APU
Parallel configuration device
Active parallel down
APD
Parallel configuration device
Passive serial
PS
Serial data path
Passive parallel synchronous
PPS
Intelligent host
Passive parallel asynchronous
PPA
Intelligent host
53
FLEX 8000
Configuration Schemes
3
FLEX 8000 Programmable Logic Device Family Data Sheet
Device
Pin-Outs
Tables 52 through 54 show the pin names and numbers for the dedicated
pins in each FLEX 8000 device package.
Table 52. FLEX 8000 84-, 100-, 144- & 160-Pin Package Pin-Outs (Part 1 of 3)
Pin Name
nSP (2)
84-Pin
PLCC
EPF8282A
75
84-Pin
PLCC
EPF8452A
EPF8636A
75
100-Pin
100-Pin
TQFP
TQFP
EPF8282A EPF8452A
EPF8282AV
75
76
144-Pin
TQFP
EPF8820A
160-Pin
PGA
EPF8452A
160-Pin
PQFP
EPF8820A
(1)
110
R1
1
MSEL0 (2)
74
74
74
75
109
P2
2
MSEL1 (2)
53
53
51
51
72
A1
44
nSTATUS (2)
32
32
24
25
37
C13
82
nCONFIG (2)
33
33
25
26
38
A15
81
DCLK (2)
10
10
100
100
143
P14
125
CONF_DONE (2)
11
11
1
1
144
N13
124
nWS
30
30
22
23
33
F13
87
nRS
48
48
42
45
31
C6
89
RDCLK
49
49
45
46
12
B5
110
nCS
29
29
21
22
4
D15
118
CS
28
28
19
21
3
E15
121
RDYnBUSY
77
77
77
78
20
P3
100
CLKUSR
50
50
47
47
13
C5
107
ADD17
51
51
49
48
75
B4
40
ADD16
36
55
28
54
76
E2
39
ADD15
56
56
55
55
77
D1
38
ADD14
57
57
57
57
78
E1
37
ADD13
58
58
58
58
79
F3
36
ADD12
60
60
59
60
83
F2
32
ADD11
61
61
60
61
85
F1
30
ADD10
62
62
61
62
87
G2
28
ADD9
63
63
62
64
89
G1
26
ADD8
64
64
64
65
92
H1
22
ADD7
65
65
65
66
94
H2
20
ADD6
66
66
66
67
95
J1
18
ADD5
67
67
67
68
97
J2
16
ADD4
69
69
68
70
102
K2
11
ADD3
70
70
69
71
103
K1
10
ADD2
71
71
71
72
104
K3
8
ADD1
76
72
76
73
105
M1
7
54
Altera Corporation
FLEX 8000 Programmable Logic Device Family Data Sheet
Table 52. FLEX 8000 84-, 100-, 144- & 160-Pin Package Pin-Outs (Part 2 of 3)
Pin Name
84-Pin
PLCC
EPF8282A
84-Pin
PLCC
EPF8452A
EPF8636A
100-Pin
100-Pin
TQFP
TQFP
EPF8282A EPF8452A
EPF8282AV
144-Pin
TQFP
EPF8820A
160-Pin
PGA
EPF8452A
160-Pin
PQFP
EPF8820A
(1)
6
ADD0
78
76
78
77
106
N3
DATA7
3
2
90
89
131
P8
140
DATA6
4
4
91
91
132
P10
139
DATA5
6
6
92
95
133
R12
138
DATA4
7
7
95
96
134
R13
136
DATA3
8
8
97
97
135
P13
135
DATA2
9
9
99
98
137
R14
133
DATA1
13
13
4
4
138
N15
132
DATA0
14
14
5
5
140
K13
129
SDOUT (3)
79
78
79
79
23
P4
97
TDI (4)
55
45 (5)
54
–
96
–
17
3
27
27 (5)
18
–
18
–
102
72
44 (5)
72
–
88
–
27
TMS (4)
20
43 (5)
11
–
86
–
29
TRST (7)
52
52 (8)
50
–
71
–
45
Dedicated
Inputs (10)
12, 31, 54,
73
12, 31, 54,
73
3, 23, 53, 73 3, 24, 53,
74
9, 26, 82,
99
C3, D14,
N2, R15
14, 33, 94,
113
VCCINT
17, 38, 59,
80
17, 38, 59,
80
6, 20, 37, 56, 9, 32, 49,
70, 87
59, 82
8, 28, 70,
90, 111
B2, C4, D3, 3, 24, 46,
D8, D12,
92, 114,
G3, G12,
160
H4, H13,
J3, J12,
M4, M7,
M9, M13,
N12
VCCIO
–
–
–
16, 40, 60,
69, 91,
112, 122,
141
–
Altera Corporation
–
23, 47, 57,
69, 79,
104, 127,
137, 149,
159
55
FLEX 8000
TDO (4)
TCK (4), (6)
FLEX 8000 Programmable Logic Device Family Data Sheet
Table 52. FLEX 8000 84-, 100-, 144- & 160-Pin Package Pin-Outs (Part 3 of 3)
Pin Name
84-Pin
PLCC
EPF8282A
84-Pin
PLCC
EPF8452A
EPF8636A
100-Pin
100-Pin
TQFP
TQFP
EPF8282A EPF8452A
EPF8282AV
144-Pin
TQFP
EPF8820A
160-Pin
PGA
EPF8452A
160-Pin
PQFP
EPF8820A
(1)
7, 17, 27,
39, 54,
80, 81,
100,101,
128, 142
C12, D4,
D7, D9,
D13, G4,
G13, H3,
H12, J4,
J13, L1,
M3, M8,
M12, M15,
N4
12, 13, 34,
35, 51, 63,
75, 80, 83,
93, 103,
115, 126,
131, 143,
155
GND
5, 26, 47, 68 5, 26, 47,
68
2, 13, 30, 44, 19, 44, 69,
52, 63, 80,
94
94
No Connect
(N.C.)
–
–
–
2, 6, 13, 30, –
37, 42, 43,
50, 52, 56,
63, 80, 87,
92, 93, 99
–
–
Total User I/O
Pins (9)
64
64
74
64
116
116
56
108
Altera Corporation
FLEX 8000 Programmable Logic Device Family Data Sheet
Table 53. FLEX 8000 160-, 192- & 208-Pin Package Pin-Outs (Part 1 of 2)
Pin Name
160-Pin
PQFP
EPF8452A
160-Pin
PQFP
EPF8636A
192-Pin PGA
208-Pin
208-Pin
208-Pin
EPF8636A
PQFP
PQFP
PQFP
EPF8820A EPF8636A (1) EPF8820A (1) EPF81188A (1)
nSP (2)
120
1
R15
207
207
5
MSEL0 (2)
117
3
T15
4
4
21
MSEL1 (2)
84
38
T3
49
49
33
nSTATUS (2) 37
83
B3
108
108
124
81
C3
103
103
107
1
120
C15
158
158
154
CONF_DONE
(2)
4
118
B15
153
153
138
nWS
30
89
C5
114
114
118
nRS
71
50
B5
66
116
121
RDCLK
73
48
C11
64
137
137
nCS
29
91
B13
116
145
142
CS
27
93
A16
118
148
144
RDYnBUSY
125
155
A8
201
127
128
CLKUSR
76
44
A10
59
134
134
ADD17
78
43
R5
57
43
46
ADD16
91
33
U3
43
42
45
ADD15
92
31
T5
41
41
44
ADD14
94
29
U4
39
40
39
ADD13
95
27
R6
37
39
37
ADD12
96
24
T6
31
35
36
ADD11
97
23
R7
30
33
31
ADD10
98
22
T7
29
31
30
ADD9
99
21
T8
28
29
29
ADD8
101
20
U9
24
25
26
ADD7
102
19
U10
23
23
25
ADD6
103
18
U11
22
21
24
ADD5
104
17
U12
21
19
18
ADD4
105
13
R12
14
14
17
ADD3
106
11
U14
12
13
16
ADD2
109
9
U15
10
11
10
ADD1
110
7
R13
8
10
9
ADD0
123
157
U16
203
9
8
DATA7
144
137
H17
178
178
177
DATA6
150
132
G17
172
176
175
DATA5
152
129
F17
169
174
172
Altera Corporation
3
FLEX 8000
nCONFIG (2) 40
DCLK (2)
57
FLEX 8000 Programmable Logic Device Family Data Sheet
Table 53. FLEX 8000 160-, 192- & 208-Pin Package Pin-Outs (Part 2 of 2)
Pin Name
160-Pin
PQFP
EPF8452A
160-Pin
PQFP
EPF8636A
192-Pin PGA
208-Pin
208-Pin
208-Pin
EPF8636A
PQFP
PQFP
PQFP
EPF8820A EPF8636A (1) EPF8820A (1) EPF81188A (1)
DATA4
154
127
E17
165
172
170
DATA3
157
124
G15
162
171
168
DATA2
159
122
F15
160
167
166
DATA1
11
115
E16
149
165
163
DATA0
12
113
C16
147
162
161
SDOUT (3)
128
152
C7 (11)
198
124
119
TDI (4)
–
55
R11
72
20
–
TDO (4)
–
95
B9
120
129
–
TCK (4), (6)
–
57
U8
74
30
–
TMS (4)
–
59
U7
76
32
–
TRST (7)
–
40
R3
54
54
–
Dedicated
Inputs (10)
5, 36, 85, 116
6, 35, 87, 116 A5, U5, U13,
A13
7, 45, 112,
150
17, 36, 121,
140
13, 41, 116,
146
VCCINT
(5.0 V)
21, 41, 53, 67,
4, 5, 26, 85,
80, 81, 100, 121, 106
133, 147, 160
5, 6, 33, 110,
137
5, 6, 27, 48,
119, 141
4, 20, 35, 48,
50, 102, 114,
131, 147
VCCIO
(5.0 V or
3.3 V)
–
25, 41, 60, 70, D3, D4, D9,
32, 55, 78, 91, 26, 55, 69, 87, 3, 19, 34, 49,
80, 107, 121, D14, D15, G4, 102, 138, 159, 102, 131, 159, 69, 87, 106,
140, 149, 160 G14, L4, L14, 182, 193, 206 173, 191, 206 123, 140, 156,
P4, P9, P14
174, 192
GND
13, 14, 28, 46,
60, 75, 93, 107,
108, 126, 140,
155
15, 16, 36, 37,
45, 51, 75, 84,
86, 96, 97,
117, 126, 131,
154
C4, D7, D8,
D10, D11, H4,
H14, K4, K14,
P7, P8, P10,
P11
19, 20, 46, 47,
60, 67, 96,
109, 111, 124,
125, 151, 164,
171, 200
15, 16, 37, 38,
60, 78, 96,
109, 110, 120,
130, 142, 152,
164, 182, 200
11, 12, 27, 28,
42, 43, 60, 78,
96, 105, 115,
122, 132, 139,
148, 155, 159,
165, 183, 201
No Connect
(N.C.)
2, 3, 38, 39, 70, 2, 39, 82, 119 C6, C12, C13,
82, 83, 118, 119,
C14, E3, E15,
148
F3, J3, J4,
J14, J15, N3,
N15, P3, P15,
R4 (12)
1, 2, 3, 16, 17,
18, 25, 26, 27,
34, 35, 36, 50,
51, 52, 53,
104, 105, 106,
107, 121, 122,
123, 130, 131,
132, 139, 140,
141, 154, 155,
156, 157, 208
1, 2, 3, 50, 51,
52, 53, 104,
105, 106, 107,
154, 155, 156,
157, 208
1, 2, 51, 52, 53,
54, 103, 104,
157, 158, 207,
208
Total User
I/O Pins (9)
116
148
144
58
114
C8, C9, C10,
R8, R9, R10,
R14
132, 148 (13) 132
Altera Corporation
FLEX 8000 Programmable Logic Device Family Data Sheet
Table 54. FLEX 8000 225-, 232-, 240-, 280- & 304-Pin Package Pin-Outs (Part 1 of 3)
Pin Name
225-Pin
BGA
EPF8820A
232-Pin
PGA
EPF81188A
240-Pin
PQFP
EPF81188A
240-Pin
PQFP
EPF81500A
280-Pin
PGA
EPF81500A
304-Pin
RQFP
EPF81500A
nSP (2)
A15
C14
237
237
W1
304
MSEL0 (2)
B14
G15
21
19
N1
26
MSEL1 (2)
R15
L15
40
38
H3
51
nSTATUS (2)
P2
L3
141
142
G19
178
nCONFIG (2)
R1
R4
117
120
B18
152
B2
C4
184
183
U18
230
CONF_DONE (2)
A1
G3
160
161
M16
204
nWS
L4
P1
133
134
F18
167
nRS
K5
N1
137
138
G18
171
RDCLK
F1
G2
158
159
M17
202
nCS
D1
E2
166
167
N16
212
CS
C1
E3
169
170
N18
215
RDYnBUSY
J3
K2
146
147
J17
183
CLKUSR
G2
H2
155
156
K19
199
ADD17
M14
R15
58
56
E3
73
ADD16
L12
T17
56
54
E2
71
ADD15
M15
P15
54
52
F4
69
ADD14
L13
M14
47
45
G1
60
ADD13
L14
M15
45
43
H2
58
ADD12
K13
M16
43
41
H1
56
ADD11
K15
K15
36
34
J3
47
ADD10
J13
K17
34
32
K3
45
ADD9
J15
J14
32
30
K4
43
ADD8
G14
J15
29
27
L1
34
ADD7
G13
H17
27
25
L2
32
ADD6
G11
H15
25
23
M1
30
ADD5
F14
F16
18
16
N2
20
ADD4
E13
F15
16
14
N3
18
ADD3
D15
F14
14
12
N4
16
ADD2
D14
D15
7
5
U1
8
ADD1
E12
B17
5
3
U2
6
ADD0
C15
C15
3
1
V1
4
DATA7
A7
A7
205
199
W13
254
DATA6
D7
D8
203
197
W14
252
DATA5
A6
B7
200
196
W15
250
Altera Corporation
3
FLEX 8000
DCLK (2)
59
FLEX 8000 Programmable Logic Device Family Data Sheet
Table 54. FLEX 8000 225-, 232-, 240-, 280- & 304-Pin Package Pin-Outs (Part 2 of 3)
Pin Name
225-Pin
BGA
EPF8820A
232-Pin
PGA
EPF81188A
240-Pin
PQFP
EPF81188A
240-Pin
PQFP
EPF81500A
280-Pin
PGA
EPF81500A
304-Pin
RQFP
EPF81500A
DATA4
A5
C7
198
194
W16
248
DATA3
B5
D7
196
193
W17
246
DATA2
E6
B5
194
190
V16
243
DATA1
D5
A3
191
189
U16
241
DATA0
C4
A2
189
187
V17
239
SDOUT (3)
K1
N2
135
136
F19
169
80 (14)
TDI
F15 (4)
–
–
63 (14)
B1 (14)
TDO
J2 (4)
–
–
117
C17
149
TCK (6)
J14 (4)
–
–
116 (14)
A19 (14)
148 (14)
TMS
J12 (4)
–
–
64 (14)
C2 (14)
81 (14)
TRST (7)
P14
–
–
115 (14)
A18 (14)
145 (14)
C1, C17, R1,
R17
10, 51, 130,
171
8, 49, 131,
172
F1, F16, P3,
P19
12, 64, 164,
217
Dedicated Inputs F4, L1, K12,
(10)
E15
VCCINT
(5.0 V)
F5, F10, E1,
L2, K4, M12,
P15, H13,
H14, B15,
C13
E4, H4, L4,
P12, L14,
H14, E14,
R14, U1
20, 42, 64, 66, 18, 40, 60, 62,
114, 128, 150, 91, 114, 129,
172, 236
151, 173, 209,
236
B17, D3, D15,
E8, E10, E12,
E14, R7, R9,
R11, R13,
R14, T14
24, 54, 77,
144, 79, 115,
162, 191, 218,
266, 301
VCCIO
(5.0 V or 3.3 V)
H3, H2, P6,
R6, P10, N10,
R14, N13,
H15, H12,
D12, A14,
B10, A10, B6,
C6, A2, C3,
M4, R2
N10, M13,
M5, K13, K5,
H13, H5, F5,
E10, E8, N8,
F13
19, 41, 65, 81,
99, 116, 140,
162, 186, 202,
220, 235
D14, E7, E9,
E11, E13, R6,
R8, R10, R12,
T13, T15
22, 53, 78, 99,
119, 137, 163,
193, 220, 244,
262, 282, 300
60
17, 39, 61, 78,
94, 108, 130,
152, 174, 191,
205, 221, 235
Altera Corporation
FLEX 8000 Programmable Logic Device Family Data Sheet
Table 54. FLEX 8000 225-, 232-, 240-, 280- & 304-Pin Package Pin-Outs (Part 3 of 3)
Pin Name
232-Pin
PGA
EPF81188A
240-Pin
PQFP
EPF81188A
240-Pin
PQFP
EPF81500A
280-Pin
PGA
EPF81500A
304-Pin
RQFP
EPF81500A
GND
B1, D4, E14,
F7, F8, F9,
F12, G6, G7,
G8, G9, G10,
H1, H4, H5,
H6, H7, H8,
H9, H10, H11,
J6, J7, J8, J9,
J10, K6, K7,
K8, K9, K11,
L15, N3, P1
A1, D6, E11,
E7, E9, G4,
G5, G13,
G14, J5, J13,
K4, K14, L5,
L13, N4, N7,
N9, N11, N14
8, 9, 30, 31,
52, 53, 72, 90,
108, 115, 129,
139, 151, 161,
173, 185, 187,
193, 211, 229
6, 7, 28, 29,
50, 51, 71, 85,
92, 101, 118,
119, 140, 141,
162, 163, 184,
185, 186, 198,
208, 214, 228
D4, D5, D16,
E4, E5, E6,
E15, E16, F5,
F15, G5, G15,
H5, H15, J5,
J15, K5, K15,
L5, L15, M5,
M15, N5,
N15, P4, P5,
P15, P16, R4,
R5, R15, R16,
T4, T5, T16,
U17
9, 11, 36, 38,
65, 67, 90,
108, 116,
128, 150,
151, 175, 177,
206, 208, 231,
232, 237, 253,
265, 273, 291
No Connect
(N.C.)
–
–
61, 62, 119,
–
120, 181, 182,
239, 240
–
10, 21, 23, 25,
35, 37, 39, 40,
41, 42, 52, 55,
66, 68, 146,
147, 161, 173,
174, 176, 187,
188, 189, 190,
192, 194, 195,
205, 207, 219,
221, 233, 234,
235, 236, 302,
303
Total User I/O
Pins (9)
148
180
180
204
204
Altera Corporation
177
61
3
FLEX 8000
225-Pin
BGA
EPF8820A
FLEX 8000 Programmable Logic Device Family Data Sheet
Notes to tables:
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
(14)
Perform a complete thermal analysis before committing a design to this device package. See Application Note 74
(Evaluating Power for Altera Devices) for more information.
This pin is a dedicated pin and is not available as a user I/O pin.
SDOUT will drive out during configuration. After configuration, it may be used as a user I/O pin. By default, the
MAX+PLUS II software will not use SDOUT as a user I/O pin; the user can override the MAX+PLUS II software and
use SDOUT as a user I/O pin.
If the device is not configured to use the JTAG BST circuitry, this pin is available as a user I/O pin.
JTAG pins are available for EPF8636A devices only. These pins are dedicated user I/O pins.
If this pin is used as an input in user mode, ensure that it does not toggle before or during configuration.
TRST is a dedicated input pin for JTAG use. This pin must be grounded if JTAG BST is not used.
Pin 52 is a V CC pin on EPF8452A devices only.
The user I/O pin count includes dedicated input pins and all I/O pins.
Unused dedicated inputs should be tied to ground on the board.
SDOUT does not exist in the EPF8636GC192 device.
These pins are no connect (N.C.) pins for EPF8636A devices only. They are user I/O pins in EPF8820A devices.
EPF8636A devices have 132 user I/O pins; EPF8820A devices have 148 user I/O pins.
For EPF81500A devices, these pins are dedicated JTAG pins and are not available as user I/O pins. If JTAG BST is
not used, TDI, TCK, TMS, and TRST should be tied to GND.
Revision
History
62
The information contained in the FLEX 8000 Programmable Logic Device
Family Data Sheet version 11.1 supersedes information published in
previous versions. The FLEX 8000 Programmable Logic Device Family Data
Sheet version 11.1 contains the following change: minor textual updates.
Altera Corporation