
Spartan-3 FPGA Family: Pinout Descriptions
44
www.xilinx.com
DS099-4 (v1.6) January 17, 2005
Product Specification
R
FT256: 256-lead Fine-pitch Thin Ball
Grid Array
The 256-lead fine-pitch thin ball grid array package, FT256,
supports three different Spartan-3 devices, including the
XC3S200, the XC3S400, and the XC3S1000. The footprints
for all three devices are identical, as shown in
Table 26
and
Figure 12
.
All the package pins appear in
Table 26
and are sorted by
bank number, then by pin name. Pairs of pins that form a dif-
ferential I/O pair appear together in the table. The table also
shows the pin number for each pin and the pin type, as
defined earlier.
An electronic version of this package pinout table and foot-
print diagram is available for download from the Xilinx web-
site at
http://www.xilinx.com/bvdocs/publications/s3_pin.zip
.
Pinout Table
Table 26:
FT256 Package Pinout
Bank
XC3S200
XC3S400
XC3S1000
Pin Name
FT256
Pin
Number
Type
0
IO
A5
I/O
0
IO
A7
I/O
0
IO/VREF_0
A3
VREF
0
IO/VREF_0
D5
VREF
0
IO_L01N_0/VRP_0
B4
DCI
0
IO_L01P_0/VRN_0
A4
DCI
0
IO_L25N_0
C5
I/O
0
IO_L25P_0
B5
I/O
0
IO_L27N_0
E6
I/O
0
IO_L27P_0
D6
I/O
0
IO_L28N_0
C6
I/O
0
IO_L28P_0
B6
I/O
0
IO_L29N_0
E7
I/O
0
IO_L29P_0
D7
I/O
0
IO_L30N_0
C7
I/O
0
IO_L30P_0
B7
I/O
0
IO_L31N_0
D8
I/O
0
IO_L31P_0/VREF_0
C8
VREF
0
IO_L32N_0/GCLK7
B8
GCLK
0
IO_L32P_0/GCLK6
A8
GCLK
0
VCCO_0
E8
VCCO
0
VCCO_0
F7
VCCO
0
VCCO_0
F8
VCCO
1
IO
A9
I/O
1
IO
A12
I/O
1
IO
C10
I/O
1
IO/VREF_1
D12
VREF
1
IO_L01N_1/VRP_1
A14
DCI
1
IO_L01P_1/VRN_1
B14
DCI
1
IO_L10N_1/VREF_1
A13
VREF
1
IO_L10P_1
B13
I/O
1
IO_L27N_1
B12
I/O
1
IO_L27P_1
C12
I/O
1
IO_L28N_1
D11
I/O
1
IO_L28P_1
E11
I/O
1
IO_L29N_1
B11
I/O
1
IO_L29P_1
C11
I/O
1
IO_L30N_1
D10
I/O
1
IO_L30P_1
E10
I/O
1
IO_L31N_1/VREF_1
A10
VREF
1
IO_L31P_1
B10
I/O
1
IO_L32N_1/GCLK5
C9
GCLK
1
IO_L32P_1/GCLK4
D9
GCLK
1
VCCO_1
E9
VCCO
1
VCCO_1
F9
VCCO
1
VCCO_1
F10
VCCO
2
IO
G16
I/O
2
IO_L01N_2/VRP_2
B16
DCI
2
IO_L01P_2/VRN_2
C16
DCI
2
IO_L16N_2
C15
I/O
2
IO_L16P_2
D14
I/O
2
IO_L17N_2
D15
I/O
2
IO_L17P_2/VREF_2
D16
VREF
2
IO_L19N_2
E13
I/O
2
IO_L19P_2
E14
I/O
2
IO_L20N_2
E15
I/O
2
IO_L20P_2
E16
I/O
2
IO_L21N_2
F12
I/O
2
IO_L21P_2
F13
I/O
2
IO_L22N_2
F14
I/O
2
IO_L22P_2
F15
I/O
2
IO_L23N_2/VREF_2
G12
VREF
2
IO_L23P_2
G13
I/O
2
IO_L24N_2
G14
I/O
2
IO_L24P_2
G15
I/O
Table 26:
FT256 Package Pinout
(Continued)
Bank
XC3S200
XC3S400
XC3S1000
Pin Name
FT256
Pin
Number
Type