XC3S100E_06 Datasheet, PDF (113/231 Pages) Xilinx, Inc – Configurable Logic Block (CLB)

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Functional Description
Production Stepping
The Spartan-3E FPGA family uses production stepping to
indicate improved capabilities or enhanced features.
All devices ordered using the standard part number support
Stepping 0 functionality and performance. Later steppings
are, by definition, a functional superset of any previous
stepping. Furthermore, configuration bitstreams generated
for any stepping are compatible with later steppings.
Xilinx ships both Stepping 0 and Stepping 1. Designs oper-
ating on the Stepping 0 devices perform similarly on a Step-
ping 1 device.
Differences Between Steppings
Table 70 summarizes the feature and performance differ-
ences between Stepping 0 devices and Stepping 1 devices.
Table 70: Differences between Spartan-3E Production Stepping Levels
Stepping 0
Stepping 1
Production status
Production
Production starting
March 2006
JTAG ID code
Different revision fields. See Table 66.
DCM DLL maximum input frequency
90 MHz
(200 MHz for XC3S1200E)
240 MHz (–4 speed grade)
275 MHz (–5 speed grade)
DCM DFS output frequency range(s)
Split ranges at 5 – 90 MHz and
220 – 307 MHz
(single range 5 – 307 MHz for
XC3S1200E)
Continuous range:
5 – 311 MHz (–4)
5 – 333 MHz (–5)
Supports multi-FPGA daisy-chain configurations
from SPI Flash
No, single FPGA only
Yes
JTAG configuration supported when FPGA in
BPI mode with a valid image in the attached
No⁽¹⁾
Yes
parallel NOR Flash PROM
JTAG EXTEST, INTEST, SAMPLE support
Yes: XC3S100E, XC3S250E, XC3S500E
No⁽²⁾: XC3S1200E, XC3S1600E
Yes
All Devices
Notes:
1. Workarounds exist. See Stepping 0 Limitations when Reprogramming via JTAG if FPGA Set for BPI Configuration.
2. JTAG BYPASS and JTAG configuration are supported
Ordering a Later Stepping
Spartan-3E FPGAs ordered using the standard part number
always support the Stepping 0 feature set. To order only the
later stepping, append an “S#” suffix to the standard order-
ing code, where ‘#’ is the stepping number, as indicated in
Table 71. Beginning with Stepping 1 and later, the stepping
level is marked on the device using a single number charac-
ter, as shown in Figure 2, Figure 3, and Figure 4 in Module
1. Stepping 0 devices are represented with either a ‘0’ mark
or no mark. See Ordering Information, page 7 in Module 1
for additional information.
Table 71: Spartan-3E Stepping Levels
Stepping
Number
Suffix Code
Status
0
None
Production
1
S1
Production
DS312-2 (v3.4) November 9, 2006
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Product Specification