Artesyn MVME2502 Installation and Use (April 2015) - Manual (Page 99)

Functional Description
MVME2502 Installation and Use (6806800R96E) 99
The MVME2502 have a keying pin at the 3.3V location at each PMC site. The MVME2502 boards
are not 5 volt PMC IO compatible. The MVME2502 also has a 5 volt keying pin location at each
PMC site. At PMC site 2, the 5 volt keying pin hole is used to mount the SATA adapter card.
Warning label covers 5 volt keying pin at PMC site 1 and also at PMC site 2. If 5 volt PMC or XMC
devices are operated on MVME2502 it may cause damage to the board.
The MVME2502 utilizes the P2020 x2 link PCI Express interface for PMC/XMC1 and x1 link PCI
Express interface for PMC/XMC2. It is designed such that same PCI Express interface is used for
either PMC or XMC. It is made possible by using PCIe Mux/DeMux chip. The CPLD via on-board
switch controls the enable pin.
The CPLD controls the PCIe Mux/DeMux at both sites. The CPLD detects the presence signal
provided by the XMC or PMC board and it will be used to configure the routing of PCIe
Mux/DeMux correspondingly.
4.9.1 PMC Add-on Card
The MVME2502 PMC interface utilizes IDT’s TSI384 as the PCie/PCI-X bridge. It supports up to
8.5 Gbps (64 bits x 133 Mhz). The on-board switch S2-5 configures the TSI384 to run on either
100 Mhz or 133 Mhz, with 133 Mhz as default.
The MVME2502 supports multi-function PMCs and processor PMCs (PrPMCs). The PMC site
has two IDSELs, two REQ/GNT pairs, and EREADY to support PrPMC as defined by VITA39.
4.9.2 XMC Add-on Card
The x2 links the PCI-E Gen 1 and is directly routed to the P15 XM connector through Pericom
MUX Switch. The on-board switch S2-4 should be set to "ON".
The XMC add-on cards are required to operate at +5V or +12V (from carrier to XMC). The
MVME2502 provides +5V to the XMC VPWR (Variable Power) pins. The MVME2502 does not
provide +12V to the XMC VPWR pins. Voltage tolerances for VPWR and all carrier supplied
voltage (+3.3 V, +12 V, -12 V) are defined by the base XMC standard.