PCI Mezzanine Card - Variants

Variants

Additional standards exist that define variants of the standard PMC. For example,

• PMC-X (PCI-X PMC) defined by the VITA 39 standard
• PPMC (aka PrPMC; processor PMC) defined by the VITA 32 standard. I.e. for allowing processors to have host or monarch, support on a PMC. Additional signaling is defined so that the PrPMC can work as the host processor on a PCI bus. The intention is to allow a monarch PMC to control the PCI bus. This is usually a requirement if the PMC is to act as a host processor module.
• CCPMC (conduction-cooled PMC) defined by the VITA 20 standard
• XMC, or Switched Mezzanine Card, (PMC with high-speed serial fabric interconnect) defined by the VITA 42 standard. XMC specifies a 5th connector ("P5") that supports PCI Express (VITA 42.3) or other high speed serial formats such as Serial RapidIO (VITA 42.2) and Parallel RapidIO (VITA 42.1).