HW-SPAR3E-SK-US-G Xilinx Inc, HW-SPAR3E-SK-US-G Datasheet - Page 108
HW-SPAR3E-SK-US-G
Manufacturer Part Number
HW-SPAR3E-SK-US-G
Description
KIT STARTER SPARTAN-3E
Manufacturer
Xilinx Inc
Specifications of HW-SPAR3E-SK-US-G
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
122-1507
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Functional Description
Readback
FPGA configuration data can be read back using either the
Slave Parallel or JTAG mode. This function is disabled if the
Bitstream Generator
or Level2.
Along with the configuration data, it is possible to read back
the contents of all registers and distributed RAM.
To synchronously control when register values are captured
for readback, use the CAPTURE_SPARTAN3 library primi-
tive, which applies for both Spartan-3 and Spartan-3E
FPGA families.
The Readback feature is available in most Spartan-3E
FPGA product options, as indicated in
back feature is not available in the XC3S1200E and
XC3S1600E FPGAs when using the -4 speed grade in the
Commercial temperature grade. Similarly, block RAM Read-
back support is not available in the -4 speed grade, Com-
mercial temperature devices. If Readback is required in an
XC3S1200E or XC3S1600E FPGA, or if block RAM Read-
back is required on any Spartan-3E FPGA, upgrade to
either the Industrial temperature grade version or the -5
speed grade.
108
Security
option is set to either Level1
Table
68. The Read-
www.xilinx.com
The Xilinx iMPACT programming software uses the Read-
back feature for its optional Verify and Readback opera-
tions. The Xilinx ChipScope™ software presently does not
use Readback but may in future updates.
Table 68: Readback Support in Spartan-3E FPGAs
Block RAM Readback
General Readback (registers, distributed RAM)
Temperature Range
All Spartan-3E
Speed Grade
XC3S1200E
XC3S1600E
XC3S100E
XC3S250E
XC3S500E
FPGAs
Yes
Yes
Yes
No
No
No
-4
Commercial
DS312-2 (v3.8) August 26, 2009
Product Specification
Yes
Yes
Yes
Yes
Yes
Yes
-5
Industrial
Yes
Yes
Yes
Yes
Yes
Yes
-4
R
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