IEEE 1386-2001 pdf download IEEE Standard for a Common Mezzanine Card (CMC) Family and IEEE Standard Physical and Environmental Layers for PCI Mezzanine Cards (PMC)
1. Overview
1.1 Scope
This standard defines the mechanics for a common set of slim mezzanine cards that can be used on VMEVME64 and VME64x boards, CompactPCI) boards, Multibus I and I boards; desktop computers; porta.ble computers; servers; and other similar computer applications. Mezzanine cards based on this standard canbe used to provide modular front panel I/0, backplane I/0, or general function expansion for the host computer.
1.2 Purpose
The majority of the popular reduced instruction set computer (RISC) and complex instruction set computer(CISC) microprocessors use the same logical and electrical layer for their high-speed local bus. These sameprocessors are being incorporated onto VME64x boards, CompactPCI boards, Multibus I and II boards.desktop computers, portable computers, servers, and other types of computer systems. There is a large mar-ket need for modular I/0 and modular local function expansion via slim mezzanine cards mounted parallelabove the host computer’s board.
This standard defines the ezzanine card mechanics for these types of applications. This mechanical defini-tion is based on IEEE Std 1301.4-1996
1.3 General arrangement
Mezzanine cards are intended to be used where slim parallel-card mounting is required as in embedded sin.gle-board computers, desktop computers. portable computers. and servers. Figure illustrates a single-sizeand a double-size mezzanine card defined by this standard.
Typical single- and double-size common mezzanine cards (CMCs) on VME64x boards are illustrated inFigure 2. Implementation of CMCs on CompactPCI and Multibus Il boards is similar to that of 6U VME64xboards except that Multibus ll boards are 220 mm deep and CompactPCI boards use a 2 mm connector sys.temCMCs can also be used on 3U VME64x and CompactPCI boards.
Multibus I boards do not use front panels. The I/0 is via the top edge of the board. Figure 3 illustrates a sin-gle CMC and two single CMCs on a Multibus I board.
The size and shape of desktop computers. portable computers, servers, and other similar types of computersvary considerably, depending on specific target markets and associated needs. Figure 4 illustrates how aCMC could be mounted inside a desktop or portable computer host. The I/0 panel arrangement would besimilar to one already illustrated.
1.4 Theory and operation of usage
CMCs are designed to be plugged into a slot above the host’s printed circuit board (PCB). The host mayplace low height components under the mezzanine card for additional functionality. The host is to provideone or more slot openings into which the mezzanine cards are plugged. The host slot opening providesmechanical support, as well as EMI shielding. For maximum utilization of component space, the mezzanine
IEEE 1386-2001 pdf download
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