XCS05-3BG100C XILINX [Xilinx, Inc], XCS05-3BG100C Datasheet - Page 33

• Manufacturer Part Number: XCS05-3BG100C
• Description: Spartan and Spartan-XL Families Field Programmable Gate Arrays
• Manufacturer: XILINX [Xilinx, Inc]

Table 17: Spartan/XL Program Data
Notes:
1.
2.
3.
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
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
DS060 (v1.6) September 19, 2001
Product Specification
Max System
Gates
CLBs
(Row x Col.)
IOBs
Part Number
Supply Voltage
Bits per Frame
Frames
Program Data
PROM Size
(bits)
Serial PROM
Express Mode
PROM Size
(bits)
Figure
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
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.
Express mode adds 57 (XCS05XL, XCS10XL), or 53 (XCS20XL, XCS30XL, XCS40XL) bits per frame, + additional start-up bits.
Device
29. The checksum consists of the 11 most signifi-
R
XCS05 XCS05XL XCS10 XCS10XL XCS20 XCS20XL XCS30 XCS30XL XCS40 XCS40XL
53,936
53,984
17S05
126
428
5V
-
(10 x 10)
XCS05
5,000
100
80
17S05XL
54,491
54,544
79,072
3.3V
127
429
94,960
95,008
17S10
166
572
5V
-
(14 x 14)
XCS10
10,000
196
112
17S10XL
128,488
95,699
95,752
Spartan and Spartan-XL Families Field Programmable Gate Arrays
3.3V
167
573
www.xilinx.com
1-800-255-7778
178,096
178,144
17S20
226
788
5V
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.
-
(20 x 20)
XCS20
20,000
400
160
17S20XL
179,111
179,160
221,056
3.3V
227
789
247,920 249,119
247,968 249,168
17S30
266
932
5V
-
(24 x 24)
XCS30
30,000
576
192
17S30XL
298,696
3.3V
267
933
329,264
329,312
17S40
1,076
306
5V
-
(28 x 28)
XCS40
40,000
784
224
17S40XL
330,647
330,696
387,856
1,077
3.3V
307
33