124 MicroBlaze Development Kit Spartan-3E 1600 Edition User Guide
www.xilinx.com UG257 (v1.1) December 5, 2007
Chapter 15: Expansion Connectors
R
Header J4
The J4 header, shown in Figure 15-10, is located immediately to the left of the J1 header. It
uses a 6-pin header consisting of 0.1-inch centered stake pins. Four FPGA pins connect to
the J4 header, J4<4:1>. Four FPGA pins connect to the J4<4:1> header. The board supplies
3.3V to the accessory board mounted in the J4 socket on the bottom pin.
UCF Location Constraints
Figure 15-11 provides the User Constraint File (UCF) constraints for accessory headers,
including the I/O pin assignment and the I/O standard used. These header connections
are shared with the FX2 connector, as shown in Figure 15-7, page 122.
Figure 15-10: FPGA Connections to the J4 Accessory Header
J4
(R14)
J4<0>
J4<1>
J4<2>
J4<3>
(T14)
(R13)
(P13)
Spartan-3E FPGA
GND
3.3V
UG257_15_10_082907
Figure 15-11: UCF Location Constraints for Accessory Headers
# ==== 6-pin header J1 ====
# These four connections are shared with the FX2 connector
#NET "J1<0>" LOC = "B4" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 6 ;
#NET "J1<1>" LOC = "A4" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 6 ;
#NET "J1<2>" LOC = "D5" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 6 ;
#NET "J1<3>" LOC = "C5" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 6 ;
# ==== 6-pin header J2 ====
# These four connections are shared with the FX2 connector
#NET "J2<0>" LOC = "A6" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 6 ;
#NET "J2<1>" LOC = "B6" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 6 ;
#NET "J2<2>" LOC = "E7" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 6 ;
#NET "J2<3>" LOC = "F7" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 6 ;
# ==== 6-pin header J4 ====
# These four connections are shared with the FX2 connector
#NET "J4<0>" LOC = "D7" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 6 ;
#NET "J4<1>" LOC = "C7" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 6 ;
#NET "J4<2>" LOC = "F8" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 6 ;
#NET "J4<3>" LOC = "E8" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 6 ;
UG257_15_11_062106
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