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36 www.xilinx.com ML310 User Guide
1-800-255-7778 UG068 (v1.01) August 25, 2004
Chapter 2: ML310 Embedded Development Platform
R
Arbiter IP. Please see the EDK Processor IP Reference Guide for more information about the
EDK IP mentioned in this section.
The FPGA is responsible generating the PCI RST signal as well as the PCI CLK signal. The
FPGA fabric is used to generate six PCI Clocks that drive each of the PCI devices/slots
shown in the Figure 2-11. All six PCI Clock outputs are length matched. Since the FPGA
generates all PCI Clocks, the downstream PCI devices have no clock input prior to or
during FPGA configuration therefore, PCI Reset should be de-asserted after the PCI CLK
has stabilized. Please review the PCI Local Bus Specification, Revision 2.2 for more detailed
information.
The on-board 33MHz/32 bit PCI Bus is connected to three fixed PCI devices that are part of
the ML310 board. These devices are listed below and more information on the devices can
be found in the following sections as well their data sheets on the ML310 CDROM
♦ Texas Instruments, TI2250, PCI-to-PCI Bridge
♦ Intel, GD82559, 10/100 PCI Ethernet NIC.
♦ Ali, M1535D+, PCI South Bridge
In addition to the three fixed PCI devices, there are a total of four 33MHz/32 Bit PCI slots
available for use. For more information on the PCI slot pinouts, refer to the PCI Local Bus
Specification, Revision 2.2 and the ML310 schematics.
♦ 2 - 3.3V Keyed PCI Add In Card Slots (P5 and P3)
♦ 2 - 5.0V Keyed PCI Add In Card Slots (P6 and P4)
Note:
The 5.0V PCI slots differ from the 3.3V slots. See the Important Instructions sheet (PN
0402263) packaged with the ML310 kit before using Universal PCI add-in cards with the ML310
board.
Figure 2-11 shows the connectivity of the PCI bus and PCI devices. For more information
on the PCI slot pinouts, refer to the PCI 2.2 Specification or review the ML310 schematics.
The 5.0V PCI slots differ from the 3.3V slots. See the Important Instructions sheet
(PN 0402263) packaged with the ML310 kit before using Universal PCI add-in cards with
the ML310 board.