Xilinx MIcroblaze Development Spartan-3E 1600E - Manual (Page 123)

MicroBlaze Development Kit Spartan-3E 1600 Edition User Guide 121
UG257 (v1.1) December 5, 2007 www.xilinx.com
Hirose 100-pin FX2 Edge Connector (J3) R
Using Differential Outputs
Differential input signals do not require any special voltage. LVDS and RSDS differential
outputs signals, on the other hand, require a 2.5V supply on I/O Bank 0. The board
provides the option to power I/O Bank 0 with either 3.3V or 2.5V. Figure 15-1, page 115
highlights the location of jumper JP9.
If using differential outputs on the FX2 connector, set jumper JP9 to 2.5V. If the jumper is
not set correctly, the outputs switch correctly but the signal levels are out of specification.
Figure 15-4: Location of Termination Resistor Pads on Top Side of Board
Figure 15-5: Location of Termination Resistor Pads on Bottom Side of Board
UG257_15_04_060806
UG257_15_05_060806
Figure 15-6: Differential Outputs
LxxN_0
LxxP_0
PAD
Signal
FPGA
UG257_15_06_060806