R
Spartan and Spartan-XL FPGA Families Data Sheet
Table 17: Spartan/XL Program Data
Device
XCS05
XCS10
XCS20
XCS30
XCS40
Max System
Gates
5,000
10,000
20,000
30,000
40,000
CLBs
100
196
400
576
784
(Row x Col.)
(10 x 10)
(14 x 14)
(20 x 20)
(24 x 24)
(28 x 28)
IOBs
80
112
160
192
205(4)
Part Number
Supply Voltage
Bits per Frame
Frames
XCS05 XCS05XL XCS10 XCS10XL XCS20 XCS20XL XCS30 XCS30XL XCS40 XCS40XL
5V
126
3.3V
127
5V
166
3.3V
167
573
5V
226
788
3.3V
227
789
5V
266
932
3.3V
267
933
5V
306
3.3V
307
428
429
572
1,076
1,077
Program Data
53,936
53,984
54,491
54,544
94,960
95,008
95,699 178,096 179,111 247,920 249,119 329,264 330,647
95,752 178,144 179,160 247,968 249,168 329,312 330,696
PROM Size
(bits)
Express Mode
PROM Size
(bits)
-
79,072
-
128,488
-
221,056
-
298,696
-
387,856
Notes:
1. Bits per Frame = (10 x number of rows) + 7 for the top + 13 for the bottom + 1 + 1 start bit + 4 error check bits (+1 for Spartan-XL
device)
Number of Frames = (36 x number of columns) + 26 for the left edge + 41 for the right edge + 1 (+ 1 for Spartan-XL device)
Program Data = (Bits per Frame x Number of Frames) + 8 postamble bits
PROM Size = Program Data + 40 (header) + 8, rounded up to the nearest byte
2. The user can add more "1" bits as leading dummy bits in the header, or, if CRC = off, as trailing dummy bits at the end of any frame,
following the four error check bits. However, the Length Count value must be adjusted for all such extra "one" bits, even for extra
leading ones at the beginning of the header.
3. Express mode adds 57 (XCS05XL, XCS10XL), or 53 (XCS20XL, XCS30XL, XCS40XL) bits per frame, + additional start-up bits.
4. XCS40XL provided 224 max I/O in CS280 package discontinued by PDN2004-01.
During Readback, 11 bits of the 16-bit checksum are added
to the end of the Readback data stream. The checksum is
computed using the CRC-16 CCITT polynomial, as shown
in Figure 29. The checksum consists of the 11 most signifi-
cant bits of the 16-bit code. A change in the checksum indi-
cates a change in the Readback bitstream. A comparison to
a previous checksum is meaningful only if the readback
data is independent of the current device state. CLB outputs
should not be included (Readback Capture option not
used), and if RAM is present, the RAM content must be
unchanged.
Statistically, one error out of 2048 might go undetected.
DS060 (v1.8) June 26, 2008
www.xilinx.com
33
Product Specification
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