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Data Sheet
January 2003
ORCA
®
Series 2
Field-Programmable Gate Arrays
Features
■
■
■
■
■
■
■
■
■
■
■
High-performance, cost-effective, low-power
0.35 µm CMOS technology (OR2CxxA), 0.3 µm CMOS
technology (OR2TxxA), and 0.25 µm CMOS technology
(OR2TxxB), (four-input look-up table (LUT) delay less
than 1.0 ns with -8 speed grade)
High density (up to 43,200 usable, logic-only gates; or
99,400 gates including RAM)
Up to 480 user I/Os (OR2TxxA and OR2TxxB I/Os are
5 V tolerant to allow interconnection to both 3.3 V and
5 V devices, selectable on a per-pin basis)
Four 16-bit look-up tables and four latches/flip-flops per
PFU, nibble-oriented for implementing 4-, 8-, 16-, and/or
32-bit (or wider) bus structures
Eight 3-state buffers per PFU for on-chip bus structures
Fast, on-chip user SRAM has features to simplify RAM
design and increase RAM speed:
— Asynchronous single port: 64 bits/PFU
— Synchronous single port: 64 bits/PFU
— Synchronous dual port: 32 bits/PFU
Improved ability to combine PFUs to create larger RAM
structures using write-port enable and 3-state buffers
Fast, dense multipliers can be created with the multiplier
mode (4 x 1 multiplier/PFU):
— 8 x 8 multiplier requires only 16 PFUs
— 30% increase in speed
Flip-flop/latch options to allow programmable priority of
synchronous set/reset vs. clock enable
Enhanced cascadable nibble-wide data path
capabilities for adders, subtractors, counters, multipliers,
and comparators including internal fast-carry operation
■
■
■
■
■
■
■
■
■
Innovative, abundant, and hierarchical nibble-
oriented routing resources that allow automatic use of
internal gates for all device densities without sacrificing
performance
Upward bit stream compatible with the
ORCA
ATT2Cxx/
ATT2Txx series of devices
Pinout-compatible with new
ORCA
Series 3 FPGAs
TTL or CMOS input levels programmable per pin for the
OR2CxxA (5 V) devices
Individually programmable drive capability:
12 mA sink/6 mA source or 6 mA sink/3 mA source
Built-in boundary scan (
IEEE
*1149.1 JTAG) and
3-state all I/O pins, (TS_ALL) testability functions
Multiple configuration options, including simple, low pin-
count serial ROMs, and peripheral or JTAG modes for in-
system programming (ISP)
Full PCI bus compliance for all devices
Supported by industry-standard CAE tools for design
entry, synthesis, and simulation with
ORCA
Foundry
Development System support (for back-end implementa-
tion)
New, added features (OR2TxxB) have:
— More I/O per package than the OR2TxxA family
— No dedicated 5 V supply (V
DD
5)
— Faster configuration speed (40 MHz)
— Pin selectable I/O clamping diodes provide 5V or 3.3V
PCI compliance and 5V tolerance
— Full PCI bus compliance in both 5V and 3.3V PCI sys-
tems
*
IEEE
is a registered trademark of The Institute of Electrical and
Electronics Engineers, Inc.
Table 1
. ORCA
Series 2 FPGAs
Device
OR2C04A/OR2T04A
OR2C06A/OR2T06A
OR2C08A/OR2T08A
OR2C10A/OR2T10A
OR2C12A
OR2C15A/OR2T15A/OR2T15B
OR2C26A/OR2T26A
OR2C40A/OR2T40A/OR2T40B
Usable
Gates*
4,800—11,000
6,900—15,900
9,400—21,600
12,300—28,300
15,600—35,800
19,200—44,200
27,600—63,600
43,200—99,400
# LUTs
400
576
784
1024
1296
1600
2304
3600
Registers
400
576
724
1024
1296
1600
2304
3600
Max User
RAM Bits
6,400
9,216
12,544
16,384
20,736
25,600
36,864
57,600
User
I/Os
160
192
224
256
288
320
384
480
Array Size
10 x 10
12 x 12
14 x 14
16 x 16
18 x 18
20 x 20
24 x 24
30 x 30
* The first number in the usable gates column assumes 48 gates per PFU (12 gates per four-input LUT/FF pair) for logic-only designs. The
second number assumes 30% of a design is RAM. PFUs used as RAM are counted at four gates per bit, with each PFU capable of
implementing a 16 x 4 RAM (or 256 gates) per PFU.
ORCA
Series 2 FPGAs
Data Sheet
January 2003
Table of Contents
Contents
Page
Contents
Page
Features .....................................................................1
Description ................................................................3
ORCA Foundry Development System Overview .......7
Architecture ...............................................................7
Programmable Logic Cells ........................................7
Programmable Function Unit .................................7
Look-Up Table Operating Modes ..........................9
Latches/Flip-Flops ...............................................17
PLC Routing Resources ......................................19
PLC Architectural Description .............................24
Programmable Input/Output Cells ...........................27
Inputs ...................................................................27
Outputs ................................................................28
5 V Tolerant I/O (OR2TxxB) .................................29
PCI Compliant I/O ................................................29
PIC Routing Resources .......................................30
PIC Architectural Description ..............................31
PLC-PIC Routing Resources ...............................32
Interquad Routing ....................................................34
Subquad Routing (OR2C40A/OR2T40A Only) ....36
PIC Interquad (MID) Routing ...............................38
Programmable Corner Cells ....................................39
Programmable Routing .......................................39
Special-Purpose Functions .................................39
Clock Distribution Network ....................................... 39
Primary Clock ......................................................39
Secondary Clock .................................................40
Selecting Clock Input Pins ..................................41
FPGA States of Operation .......................................42
Initialization ..........................................................42
Configuration .......................................................43
Start-Up ...............................................................44
Reconfiguration ...................................................44
Partial Reconfiguration ........................................45
Other Configuration Options ...............................45
Configuration Data Format ......................................45
Using
ORCA
Foundry to Generate
Configuration RAM Data ...................................46
Configuration Data Frame ...................................46
Bit Stream Error Checking .......................................49
FPGA Configuration Modes .....................................49
Master Parallel Mode ...........................................49
Master Serial Mode .............................................50
Asynchronous Peripheral Mode .......................... 51
Synchronous Peripheral Mode ............................51
Slave Serial Mode ................................................52
Slave Parallel Mode .............................................52
Daisy Chain .........................................................53
Special Function Blocks ..........................................54
Single Function Blocks ........................................54
Boundary Scan ....................................................56
2
Boundary-Scan Instructions ................................ 57
ORCA Boundary-Scan Circuitry ..........................58
ORCA Timing Characteristics .................................62
Estimating Power Dissipation ..................................63
OR2CxxA .............................................................63
OR2TxxA ..............................................................65
OR2T15B and OR2T40B .....................................67
Pin Information .........................................................68
Pin Descriptions ...................................................68
Package Compatibility .........................................70
Compatibility with Series 3 FPGAs .......................72
Package Thermal Characteristics .........................128
Theta JA .............................................................128
Theta JC ............................................................128
Theta JC ............................................................128
Theta JB .............................................................128
Package Coplanarity .............................................129
Package Parasitics ................................................129
Absolute Maximum Ratings ...................................131
Recommended Operating Conditions ..................131
Electrical Characteristics .......................................132
Timing Characteristics ...........................................134
Series 2 ..............................................................162
Measurement Conditions ......................................171
Output Buffer Characteristics ................................172
OR2CxxA ...........................................................172
OR2TxxA ............................................................173
OR2TxxB ............................................................174
Package Outline Drawings ....................................175
Terms and Definitions ........................................175
84-Pin PLCC ......................................................176
100-Pin TQFP .....................................................177
144-Pin TQFP .....................................................178
160-Pin QFP .......................................................179
208-Pin SQFP ....................................................180
208-Pin SQFP2 ..................................................181
240-Pin SQFP ....................................................182
240-Pin SQFP2 ..................................................183
256-Pin PBGA ....................................................184
304-Pin SQFP ....................................................185
304-Pin SQFP2 ..................................................186
352-Pin PBGA ....................................................187
432-Pin EBGA ....................................................188
Ordering Information ............................................189
Lattice Semiconductor
Data Sheet
January 2003
ORCA
Series 2 FPGAs
mable input/output cells (PICs). An array of PLCs is
surrounded by PICs as shown in Figure 1. Each PLC
contains a programmable function unit (PFU). The
PLCs and PICs also contain routing resources and
configuration RAM. All logic is done in the PFU. Each
PFU contains four 16-bit look-up tables (LUTs) and four
latches/flip-flops (FFs).
The PLC architecture provides a balanced mix of logic
and routing that allows a higher utilized gate/PFU than
alternative architectures. The routing resources carry
logic signals between PFUs and I/O pads. The routing
in the PLC is symmetrical about the horizontal and ver-
tical axes. This improves routability by allowing a bus of
signals to be routed into the PLC from any direction.
Some examples of the resources required and the per-
formance that can be achieved using these devices are
represented in Table 2.
Description
The
ORCA
Series 2 series of SRAM-based FPGAs are
an enhanced version of the ATT2C/2T architecture.
The latest
ORCA
series includes patented architectural
enhancements that make functions faster and easier to
design while conserving the use of PLCs and routing
resources.
The Series 2 devices can be used as drop-in replace-
ments for the ATT2Cxx/ATT2Txx series, respectively,
and they are also bit stream compatible with each
other. The usable gate counts associated with each
series are provided in Table 1. Both series are offered
in a variety of packages, speed grades, and tempera-
ture ranges.
The
ORCA
series FPGA consists of two basic ele-
ments: programmable logic cells (PLCs) and program-
Table 2
. ORCA
Series 2CA System Performance
Function
16-bit loadable up/down
counter
16-bit accumulator
8 x 8 parallel multiplier:
— Multiplier mode,
unpipelined
1
— ROM mode, unpipelined
2
— Multiplier mode, pipelined
3
32 x 16 RAM:
— Single port (read and write/
cycle)
4
— Single port
5
— Dual port
6
36-bit parity check (internal)
32-bit address decode
(internal)
#
PFUs
Speed Grade
-3
66.7
66.7
19.3
55.6
69.0
-4
87.0
87.0
25.1
71.9
82.0
Unit
MHz
MHz
MHz
MHz
MHz
4
4
22
9
44
9
9
16
4
3.25
28.6
52.6
52.6
11.0
9.5
36.2
69.0
83.3
9.1
7.5
MHz
MHz
MHz
ns
ns
1.Implemented using 4 x 1 multiplier mode (unpipelined), register-to-register, two 8-bit inputs, one 16-bit output.
2. Implemented using two 16 x 12 ROMs and one 12-bit adder, one 8-bit input, one fixed operand, one 16-bit output.
3. Implemented using 4 x 1 multiplier mode (fully pipelined), two 8-bit inputs, one 16-bit output (28 of 44 PFUs contain only pipelining registers).
4. Implemented using 16 x 4 synchronous single-port RAM mode allowing both read and write per clock cycle, including write/read address
multiplexer.
5. Implemented using 16 x 4 synchronous single-port RAM mode allowing either read or write per clock cycle, including write/read address mul-
tiplexer.
6. Implemented using 16 x 2 synchronous dual-port RAM mode.
Lattice Semiconductor
3
ORCA
Series 2 FPGAs
Table 3
. ORCA
Series 2TA System Performance
Speed Grade
Function
16-bit loadable up/down
counter
16-bit accumulator
8 x 8 parallel multiplier:
— Multiplier mode,
unpipelined
1
— ROM mode, unpipelined
2
— Multiplier mode, pipelined
3
32 x 16 RAM:
— Single port (read and write/
cycle)
4
— Single port
5
— Dual port
6
36-bit parity check (internal)
32-bit address decode
(internal)
#
PFUs
Data Sheet
January 2003
Unit
-4
-5
104.2
104.2
31.0
87.7
103.1
-6
129.9
129.9
36.0
107.5
125.0
-7
144.9
144.9
40.3
122.0
142.9
4
4
22
9
44
87.0
87.0
25.1
71.9
82.0
MHz
MHz
MHz
MHz
MHz
9
9
16
4
3.25
36.2
69.0
83.3
9.1
7.5
53.8
92.6
92.6
7.4
6.1
53.8
92.6
92.6
5.6
4.6
62.5
96.2
96.2
5.2
4.3
MHz
MHz
MHz
ns
ns
1.Implemented using 4 x 1 multiplier mode (unpipelined), register-to-register, two 8-bit inputs, one 16-bit output.
2. Implemented using two 16 x 12 ROMs and one 12-bit adder, one 8-bit input, one fixed operand, one 16-bit output.
3. Implemented using 4 x 1 multiplier mode (fully pipelined), two 8-bit inputs, one 16-bit output (28 of 44 PFUs contain only pipelining registers).
4. Implemented using 16 x 4 synchronous single-port RAM mode allowing both read and write per clock cycle, including write/read address
multiplexer.
5. Implemented using 16 x 4 synchronous single-port RAM mode allowing either read or write per clock cycle, including write/read address mul-
tiplexer.
6. Implemented using 16 x 2 synchronous dual-port RAM mode.
4
Lattice Semiconductor
PCB Design
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