XCR3128 Datasheet, PDF (1/18 Pages) Xilinx, Inc – XCR3128: 128 Macrocell CPLD

APPLICATION NOTE
0
R
XCR3128: 128 Macrocell CPLD
DS034 (v1.2) August 10, 2000
0 14* _{Product Specification}
Introduction
• Industry's first TotalCMOS™ PLD - both CMOS design
and process technologies
• Fast Zero Power (FZP™) design technique provides
ultra-low power and very high speed
• IEEE 1149.1-compliant, JTAG Testing Capability
- Four pin JTAG interface (TCK, TMS, TDI, TDO)
- IEEE 1149.1 TAP Controller
- JTAG commands include: Bypass, Sample/Preload,
Extest, Usercode, Idcode, HighZ
• 3.3V, In-System Programmable (ISP) using the JTAG
interface
- On-chip supervoltage generation
- ISP commands include: Enable, Erase, Program,
Verify
- Supported by multiple ISP programming plat-
forms
• High speed pin-to-pin delays of 10 ns
• Ultra-low static power of less than 100 µA
• 100% routable with 100% utilization while all pins and
all macrocells are fixed
• Deterministic timing model that is extremely simple to
use
• Four clocks available
• Programmable clock polarity at every macrocell
• Support for asynchronous clocking
• Innovative XPLA™ architecture combines high-speed
with extreme flexibility
• 1000 erase/program cycles guaranteed
• 20 years data retention guaranteed
• Logic expandable to 37 product terms
• PCI compliant
• Advanced 0.5µ E²CMOS process
• Security bit prevents unauthorized access
• Design entry and verification using industry standard
and Xilinx CAE tools
• Reprogrammable using industry standard device
programmers
• Innovative control term structure provides either sum
terms or product terms in each logic block for:
- Programmable 3-state buffer
- Asynchronous macrocell register preset/reset
- Programmable global 3-state pin facilitates "bed of
nails" testing without using logic resources
- Available in PLCC, VQFP, and PQFP packages
- Available in both commercial and industrial grades
Description
The XCR3128 CPLD (Complex Programmable Logic
Device) is the third in a family of CoolRunner^® CPLDs from
Xilinx. These devices combine high speed and zero power
in a 128 macrocell CPLD. With the FZP design technique,
the XCR3128 offers true pin-to-pin speeds of 10 ns, while
simultaneously delivering power that is less than 100 µA at
standby without the need for ‘ turbo-bits’ or other
power-down schemes. By replacing conventional sense
amplifier methods for implementing product terms (a tech-
nique that has been used in PLDs since the bipolar era)
with a cascaded chain of pure CMOS gates, the dynamic
power is also substantially lower than any competing
CPLD. These devices are the first TotalCMOS PLDs, as
they use both a CMOS process technology and the pat-
ented full CMOS FZP design technique. For 5V applica-
tions, Xilinx also offers the high speed XCR5128 CPLD that
offers these features in a full 5V implementation.
The Xilinx FZP CPLDs utilize the patented XPLA
(eXtended Programmable Logic Array) architecture. The
XPLA architecture combines the best features of both PLA
and PAL type structures to deliver high speed and flexible
logic allocation that results in superior ability to make
design changes with fixed pinouts. The XPLA structure in
each logic block provides a fast 10 ns PAL path with five
dedicated product terms per output. This PAL path is joined
by an additional PLA structure that deploys a pool of 32
product terms to a fully programmable OR array that can
allocate the PLA product terms to any output in the logic
block. This combination allows logic to be allocated effi-
ciently throughout the logic block and supports as many as
37 product terms on an output. The speed with which logic
is allocated from the PLA array to an output is only 2.5 ns,
regardless of the number of PLA product terms used, which
results in worst case t_PD’s of only 12.5 ns from any pin to
any other pin. In addition, logic that is common to multiple
outputs can be placed on a single PLA product term and
shared across multiple outputs via the OR array, effectively
increasing design density.
The XCR3128 CPLDs are supported by industry standard
CAE tools (CadencE/OrCAD, Exemplar Logic, Mentor,
Synopsys, Synario, Viewlogic, and Synplicity), using text
(ABEL, VHDL, Verilog) and/or schematic entry. Design ver-
ification uses industry standard simulators for functional
and timing simulation. Development is supported on per-
sonal computer, Sparc, and HP platforms. Device fitting
uses a Xilinx developed tool, XPLA Professional (available
on the Xilinx web site).
DS034 (v1.2) August 10, 2000
www.xilinx.com
1
1-800-255-7778