PMC

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PMC Description

PMC: PCI Mezzanine Card. IEEE 1386.1; IEEE Standard Physical and Environmental Layers for PCI Mezzanine Cards: PMC.
IEEE 1386.1 is the electrical standard for a CMC module. PMC uses the PCI bus spec in a new form factor.
PMC board use either 3.3v or 5v signals over the PCI bus. Maximum power dissipation is also defined.
The PMC bus will support both 32 bit PCI at 33MHz and 64 bit PCI at 64MHz.
The single width card size is 74mm x 149mm x 8.2mm, allowing two PMC modules to exist on a 6U Euro-Card format ~ VME or cPCI card.
A double width card measures 149mm x 149mm x 8.2mm, but allows only one mezzanine card to reside on the mother board.
The component height off the board is 4.7mm, the reverse side allows for 3.5mm off the card.
Provided the PMC card resides 10mm above the mother board (rising above the P2 connectors) the card length may be increased to 155mm.

Five connectors are defined: (2 rows x 32 pins @ 1mm)
Pn1/Jn1 -Pn2/Jn2 connector: Provides 32 bit PCI
Pn3/Jn3 connector: Allows 64 bit PCI
Pn4/Jn4 connector: Provides 64 bit backplane I/O (Optional).
When 2 PMCs are mounted on a Mother Board. Either half of each PMC is mapped or all one PMC is mapped ~ but not all of both.
Pn5/Jn5 connector: Provides user defined signals (Optional)

VITA 20-199x - Conduction Cooled PCI Mezzanine Card (CCPMC)
VITA 32-199x - Processor PMC Standard For Processor PCI Mezzanine Cards [PPMC]
VITA 35-199x - PMC-P4 Pin Out Mapping To VME-P0 and MVE64x-P2
VITA 36-199x - PIM (PMC Interface Module) PMC I/O Module Standard (Rear I/O PMC)
PICMG 2.3 R1.0 - PMC I/O Pin Assignments on CompactPCI;
Defines user I/O pin mappings from IEEE 1386 PMC sites to J3/P3, J4/P4, and J5/P5 on a CompactPCI.

PMC modules support Mother Board front panel connections via a bezel ~ with the Mother board providing an opening in their front panel (71.8mm x 13.2mm). Other types of PMC mezzanine; PIM PMC Interface Module, uses rear I/O and does not utilize a front bezel; PTMC PCI Telcom Mezzanine Card, PMCx PCI-X on PMC, and PPMC Processor PMC uses the same pin out as the PMC module but increases the maximum component height.
PTMC is based on the four connector standard PCI Mezzanine Card (PMC). The PTMC provides all of the traditional PMC 32-bit PCI signals on the Pn1 and Pn2 connectors, and supports specialized telecom interfaces on Pn3 and Pn4. PTMC coexists with PMC and supports three popular industry standard telecom bus interfaces and Ethernet. The PCI Telecom Mezzanine Card Specification defines pin locations on Pn3/Jn3 and Pn4/Jn4 for signals of the RMII, Ethernet PHY Management Interface, UTOPIA Level 1, UTOPIA Level 2, POS-PHY Level 2, and ECTF H.110 interfaces.

Note the up-grade path for PMC modules is the PPMC Module [discussed below].

Single wide and double wide PMC board dimensions

Single-wide & Double-wide PMC Boards

PMC Pinout

**PMC/PPMC 32 Bit Connector Pin Outs and Signal Names**
Pin #	Signal Name	Pin #	Signal Name	Pin #	Signal Name	Pin #	Signal Name
PN1 Connector				PN2 Connector
1	TCK	2	-12v	1	+12v	2	TRST#
3	Ground	4	INTA#	3	TMS	4	TDO
5	INTB#	6	INTC#	5	TDI	6	Ground
7	PRESENT#	8	+5v	7	Ground	8	PCI-A9
9	INTD#	10	PCI-B14	9	PCI-B10	10	PCI-A11
11	Ground	12	3.3Vaux	11	PUP	12	+3.3v
13	PCICLK	14	Ground	13	RST#	14	PDN
15	Ground	16	GNT#	15	+3.3v	16	PDN
17	REQ#	18	+5v	17	PME#	18	Ground
19	V{I/O}	20	AD[31]	19	AD[30]	20	AD[29]
21	AD[28]	22	AD[27]	21	Ground	22	AD[26]
23	AD[25]	24	Ground	23	AD[24]	24	+3.3v
25	Ground	26	C/BE[3]#	25	IDSEL	26	AD[23]
27	AD[22]	28	AD[21]	27	+3.3v	28	AD[20]
29	AD[19]	30	+5v	29	AD[18]	30	Ground
31	V[I/O]	32	AD[17]	31	AD[16]	32	C/BE[2]#
33	FRAME#	34	Ground	33	Ground	34	IDSELB
35	Ground	36	IRDY#	35	TRDY#	36	+3.3v
37	DEVSEL#	38	+5v	37	Ground	38	STOP#
39	Ground	40	LOCK#	39	PERR#	40	Ground
41	PCI-A40	42	PCI-A41	41	+3.3v	42	SERR#
43	PAR	44	Ground	43	C/BE[1]#	44	Ground
45	V[I/O]	46	AD[15]	45	AD[14]	46	AD[13]
47	AD[12]	48	AD[11]	47	M66EN	48	AD[10]
49	AD[09]	50	+5v	49	AD[08]	50	+3.3v
51	Ground	52	C/BE[0]#	51	AD[07]	52	REQB#
53	AD[06]	54	AD[05]	53	+3.3v	54	GNTB#
55	AD[04]	56	Ground	55	PMC-RSVD	56	Ground
57	V[I/O]	58	AD[03]	57	PMC-RSVD	58	EREADY
59	AD[02]	60	AD[01]	59	Ground	60	RESETOUT#
61	AD[00]	62	+5v	61	ACK64#	62	+3.3v
63	Ground	64	REQ64#	63	Ground	64	MONARCH#

PPMC Board Description

Processor PMC [PrPMC], VITA32, For Processor PCI Mezzanine Cards.
Processor PMC is an extension to the PMC specification to support CPU based cards.
The purpose of the Processor PMC interface is to enhance the functionality of the PMC daughter boards allowing higher order processor functions.
The signaling protocols remains the same between the PMC board and Processor PMC boards.
However some of the pins used with PMC have been repurposed by the PPMC standard.
The upgraded PPMC standard allows the mezzanine card to operate at either 33MHz or 66MHz speeds.

The carrier card most be designed to handle a Processor PMC board, and or a PMC board.
If a PPMC board is plugged into a carrier card that operates with a PMC board than the PPMC board will default to PMC operation.
However if the carrier card is designed to accept a PPMC than the mezzanine card will function at 66MHz.
The mechanical format follows the Common Mezzanine Card [CMC] specification [IEEE1386].
The Processor PMC board formats follow the size of PMC boards.
Two board heights are allowed; 10mm and 20mm high boards.
Note; primarily the Processor PMC standard only covers the differences between the upgrade and the current PMC specification.

PMC-X Board Description

PMC-X: is a PCI-X interface in a Mezzanine Card 'PMC' format. A PCI Mezzanine Card, X revision, running at 100MHz or 133MHz.
PMC-X was defined in VITA 39 [2003], which is part of the VME series of specifications:
ANSI/VITA 39; PCI-X for PMC and Processor PMC.
PMC-X uses both IEEE 1386 CMC ("Common Mezzanine Card") and IEEE 1386.1 PMC ("PCI Mezzanine Card") specifications.
Also refer to the Mezzanine card descriptions page for other types of Mezzanine boards.
The PC expansions slot for the PCI-X bus was only found in industrial systems, primarily servers and embedded systems.
In other words the PCI-X version of PCI was a small off-shoot, seldom used outside mainstream personal computers.
PMC-X is the industrial follow on to PCI-X and moves PCI-X into the PMC form factor of mezzanine cards.

This board I/O format should not be used in a new design. The PCI interface was replaced by PCIe a few years ago.
The PCI-X was just a variation of that spec and only used when a small speed increase was required.
Another mezzanine format should be used unless the carrier card only uses PMC-X. See PMC or PrPMC [PPMC].

PMC-X Board Manufacturers

4DSP {Virtex-5 FPGA PMC/PMC-X, Virtex-4}

Dynatem {PMCX LAN, SCSI, SATA}

Technobox inc. {32/64 Bit 33/66 MHz PCI-X to PMC-X Adapter}

The main list of PMC-X Board Manufacturers for a more complete listing of circuit card assemblies [CCA].

A listing of companies that manufacture PMC-X Mezzanine cards
Don't expect new PMC-X format cards to be released.
The only cards being offered on the market should be as replacement boards for cards already sold.


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