ML410 Embedded Development Platform
www.xilinx.com
55
UG085 (v1.7.2) December 11, 2008
Detailed Description
R
PCI Express
ML410 platforms that are equipped with PCI Express host connectors (P53 and P54) are
capable of supporting PCI Express cores. Power distribution is handled by a MIC2959B
dual-slot PCI Express hot-plug controller (
Figure 2-16
) that also provides comprehensive
system protection and fault isolation. The MIC2959B controls the power delivered through
MOSFETs to the Slot A (P53) and Slot B (P54) PCI Express connectors. The MIC2592B also
incorporates an SMBus interface that provides control for and status of each PCI Express
slot.
Although two 16x PCI Express connectors are mounted on ML410 platforms, not all 16
lanes are wired for use. Refer to
Appendix A, “Board Revisions”
for a summary of features
and devices available on each board.
The PCI Express interface supports MGTs operating at 2.5 Gb/s. Power is activated to the
PCI Express slots only when the proper MIC2959B IIC commands are delivered to the
MIC2959B at address
0x8E
over the IIC interface. For more on IIC, see
“IIC/SMBus
Interface,” page 69
. For details on the power controller, see the
MIC2959B data sheet
at
www.micrel.com
. For more on clocking, see
“Clock Generation,” page 26
.
Figure 2-16:
PCI Express Power Management and Clocking
UG085_29_0526406
PCIE Slot A
PCIE Slot B
U14/U16
U51/U52
MOSFETs
MIC2592B
PCI Express
Power Management
U55
ADDR:
0x8E
+3.3
IIC_SCL
IIC_SDA
+12V
+3.3V @ 3A
+12V @ 2.1A
25 MHz
100 MHz
X5
CLK100_Q0
U48
U53
ICS874003
CLK100_NQ0
100 MHz
PCIE_SLOTA_CLK
PCIE_SLOTA_NCLK
PCIE_SLOTB_CLK
PCIE_SLOTB_NCLK
FPGA (U37)
XC4VFX60
P53
P54
MGT
MGT
MGT
MGT
MGT
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