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Intel NetStructure
®
MPCMM0002 Chassis Management Module
July 2007 Hardware TPS
Order Number: 309247-004US 19
Module Components—MPCMM0002 CMM
4.3 Memory
The CMM has a SODIMM (Small Outline Dual Inline Memory Module) socket on board.
The SODIMM is populated with a 128 MByte unbuffered memory module.
The CMM also has four separate 16 MByte flash modules. These are Intel
®
E28F128
flash memory modules. Each memory module has multiple lockable regions within the
flash.
4.4 Ethernet
The CMM has two Intel
®
82551QM Fast Ethernet Multifunction Controllers with
integrated media access controllers and physical interfaces. The output from each of
these chips is passed to a dedicated multiplexing device (mux), the SN74CBT16124.
Each mux can be individually controlled to send the Ethernet signals to one of three
destinations: the front panel, an optional RTM connection, or a separate backplane
connection. Separate magnetics (six total) provide magnetic coupling for the 10BASE-T
or 100BASE-TX signaling commonly associated with 10/100 MByte/s Ethernet.
In Figure 3, “CMM Top View Layout” on page 16, the four magnetics for the RTM and
backplane connections are at the bottom of the board. The two magnetics for the front
panel are integrated into the front panel RJ-45 connectors.
4.5 Serial Port UARTs
The UART (Universal Asynchronous Receiver/Transmitter) controller on the CMM board
is a Texas Instruments* TL16C752B dual UART chip. The first serial port is connected to
an RJ-45 connector on the front panel; the second serial port is passed to the rear of
the card for an optional RTM connection. Full modem hardware signals are passed
through to the RTM.
The UART driver provides 15 kV of ESD protection (8 kV contact, 15 kV air discharge).