Voltage Supplies To The Connector; Connector Pinout And Fpga Connections - Xilinx MIcroBlaze Development Spartan-3E 1600E Kit User Manual

Chapter 15: Expansion Connectors
Three signals are reserved primarily as clock signals between the board and FX2 connector,
although all three connect to full I/O pins.

Voltage Supplies to the Connector

The MicroBlaze Development Kit board provides power to the Hirose 100-pin FX
connector and any attached board via two supplies (see
provides a voltage source for any 5V logic on the attached board or alternately provides
power to any voltage regulators on the attached board.
A separate supply provides the same voltage at that applied to the FPGA's I/O Bank 0. All
FPGA I/Os that interface to the Hirose connector are in Bank 0. The I/O Bank 0 supply is
3.3V by default. However, the voltage level can be changed to 2.5V using jumper JP9. Some
FPGA I/O standards—especially the differential standards such as RSDS and LVDS—
require a 2.5V output supply voltage.
To support high-speed signals across the connector, a majority of pins on the B-side of the
FX2 connector are tied to GND.

Connector Pinout and FPGA Connections

Table 15-1
pin connections. The FX2 connect has two rows of connectors, both with 50 connections
each, shown in the table using light yellow shading.
Table 15-1
Accessory Headers (J1, J2, and J4), and the connectorless debugging header (J6).
116
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Spartan-3E FPGA
(See Table)
(See Table)
(C3)
(C15)
(E10)
(D10)
(D9)
2.5V
Figure 15-2: FPGA Connections to the Hirose 100-pin Edge Connector
shows the pinout for the Hirose 100-pin FX2 connector and the associated FPGA
also highlights the shared connections to the eight discrete LEDs, the three 6-pin
MicroBlaze Development Kit Spartan-3E 1600 Edition User Guide
Hirose 100-pin Expansion
Connector (J3)
FX2_IO<34:1>
(See Table)
FX2_IP<38:35>
(See Table)
FX2_IO<39>
(A.44)
FX2_IP<40>
(A.45)
FX2_CLKIN
(B.46)
FX2_CLKOUT
(A.47)
FX2_CLKIO
(B.48)
Bank 0 Supply
(JP9)
3.3V
5.0V
GND
Figure
UG257 (v1.1) December 5, 2007
UG257_15_02_060806
15-2). The 5.0V supply
R