CICS paper on XC2000 series (1986) [apparently not available online]
W. S. Carter, K. Duong, R. H. Freeman, H.-C Hsieh, J. Y. Ja, J. E. Mahoney, L. T. Ngo, and S. L. Sze, "A user programmable reconfigurable logic array," Proceedings of the Custom Integrated Circuits Conference, pp. 233-235, 1986.
This was fabbed in a 2um process, according to (see page 2) of Xcell15.pdf, copied from from http://www.xilinx.com/publications/archives/xcell/Xcell15.pdf.
This was the original product data sheet, a current data sheet that has a compatible version of this part is available here, copied from http://www.xilinx.com/support/documentation/data_sheets/xc3000.htm.
See also: CICS paper on the XC3090 (1998):
"A 9000-gate user-programmable gate array", or locally here.
This was the original product data sheet, copied from http://www.alldatasheet.com/view.jsp?sSearchword=XC4004.
Data sheets for a forward-compatible version of the part are available at: http://www.xilinx.com/support/documentation/xc4000.htm
See also: CICS paper on the XC4000 series (1990): "Third-generation architecture boosts speed and density of field-programmable gate arrays", or locally here.
FPGA conference paper on interconnect of XC4000EX, or locally here.
jbits.pdf, copied from http://www.imamu.edu.sa/dcontent/IT_Topics/java/jbits.pdf. XC4000 Jbits paper by Xilinx authors.
xcell3.pdf. Xcell XC4000 description (page 4), copied from http://www.xilinx.com/publications/archives/xcell/Xcell3.pdf.
xcell10.pdf. Xcell descriptions of XC3000 and XC4000 product updates (page 11), copied from http://www.xilinx.com/publications/archives/xcell/Xcell10.pdf.
xcell13.pdf. Xcell XC4025 description (page 14). Copied from http://www.xilinx.com/publications/archives/xcell/Xcell13.pdf.
xcell18.pdf. Xcell XC4000E RAM and FIFO capabilities (page 31). Copied from http://www.xilinx.com/publications/archives/xcell/Xcell18.pdf.
CICS paper on the XC5000 (1995): "Logic block and routing considerations for a new SRAM-based FPGA architecture"
xcell15.pdf. Xcell XC5000 introduction (page 14). Copied from http://www.xilinx.com/publications/archives/xcell/Xcell15.pdf.
CICS paper on XC8100 (1996): Here.
xcell18.pdf. Xcell introduction (page 20), copied from http://www.xilinx.com/publications/archives/xcell/Xcell18.pdf.
xcell18.pdf. Xcell introduction (page 22), copied from http://www.xilinx.com/publications/archives/xcell/Xcell18.pdf
Paper by Xilinx authors: "The XC6200 FastMap Processor Interface", Stephen Churcher, Tom Kean, and Bill Wilkie (Xilinx Inc). Copied from http://www-bd.fnal.gov/icalepcs/abstracts/PDF/m4ad.pdf.
Many papers exist by academic users, example paper: "Run-time parameterised circuits for the Xilinx XC6200", Rob Payne.
xcell27.pdf. Xcell preview (pages 4-5), copied from http://www.xilinx.com/publications/archives/xcell/Xcell27.pdf
xcell31.pdf. Xcell product release (page 4), copied from http://www.xilinx.com/publications/archives/xcell/Xcell31.pdf
xcell27.pdf. Xcell preview (page 6), copied from http://www.xilinx.com/publications/archives/xcell/Xcell27.pdf
xcell28.pdf. Spartan power consumption analysis (page 6), copied from http://www.xilinx.com/publications/archives/xcell/Xcell28.pdf
xcell34.pdf. Xcell feature (page 5), copied from http://www.xilinx.com/publications/archives/xcell/Xcell34.pdf
Xcell feature (page 4) http://www.xilinx.com/publications/archives/xcell/Xcell40.pdf
FPGA Conference Paper by Xilinx Authors Dynamic power consumption in Virtex-II FPGA family http://portal.acm.org/citation.cfm?id=503072
DATEC Paper by Xilinx Authors (follow-ons also exist) A lightweight approach for embedded reconfiguration of FPGAs "http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1253642"
Xcell special issue (page 6, page 10) http://www.xilinx.com/publications/archives/xcell/Xcell42.pdf 2003: Spartan-3 Xilinx Data Sheet Page: http://www.xilinx.com/support/documentation/spartan-3.htm
Xcell special issue (page 7) http://www.xilinx.com/publications/archives/xcell/Xcell46.pdf
FPGA conference paper by Trimberger http://portal.acm.org/citation.cfm?doid=1117201.1117203
Xcell cover story (page 9) http://www.xilinx.com/publications/archives/xcell/Xcell45.pdf
Hot-Chips Slides http://www.hotchips.org/archives/hc17/3_Tue/HC17.S7/HC17.S7T2.pdf
Xcell introduction (page 33) http://www.xilinx.com/publications/archives/xcell/Xcell51.pdf
Xcell special issue: http://www.xilinx.com/publications/archives/xcell/Xcell52.pdf
Xcell introduction (page 13) http://www.xilinx.com/publications/archives/xcell/Xcell53.pdf
Hot-Chips Slides: http://www.hotchips.org/archives/hc18/2_Mon/HC18.S4/HC18.S4T1.pdf
CICC paper, Xilinx authors CAD Techniques for Power Optimization in Virtex-5 FPGAs http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=4405687
Xcell special issue: http://www.xilinx.com/publications/archives/xcell/Xcell59.pdf
http://www.xilinx.com/support/documentation/spartan-3a.htm
Hot-Chips Slides: http://www.hotchips.org/archives/hc20/3_Tues/HC20.26.511.pdf
Xcell cover story: http://www.xilinx.com/publications/archives/xcell/Xcell64.pdf
Hot-Chips Slides: http://www.hotchips.org/archives/hc21/3_tues/HC21.25.700.FPGAs-Epub/HC21.25.7300.Alfke-Xilinx-Virtex6-Spartan6.pdf
Xcell feature story (page 8) http://www.xilinx.com/publications/archives/xcell/Xcell68.pdf
Xcell Xilinx-7 preview (page 6) http://www.xilinx.com/publications/archives/xcell/Xcell72.pdf
Xcell ARM architure preview (page 6) http://www.xilinx.com/publications/archives/xcell/Xcell71.pdf