Intel MPCMM0002 manual Ethernet Routing, Chassis Elements Directly Driven by CMM Hardware

Backplane Considerations—MPCMM0002 CMM

Table 5.	Chassis Elements Directly Driven by CMM Hardware
	Chassis	Component	Notes
	Element
		EEPROM + others	50 mA @ 5 V max; typically uses series resistance to drop
	CDM		voltage to 3.3.V.
		LED	Tricolor LEDs driven by CMM
	Filter Tray	2 Thermistors	NTC sensors, such as US Sensor USX2257
		LED	Red plus green LEDs driven by CMM
	Power switch	Dual pole switch	Soft power switch to CMMs
	LAN ports	2 LEDs each (4 total)	Speed on one LED, Link and Activity on the other

6.2.5Ethernet Routing

Each CMM provides two Ethernet channels that can be routed to the base interface of PICMG* 3.0 hub slots. The PICMG 3.0 specification only allocates space for one ShMC slot, but the backplane can typically be set up to “poach” an unused slot in order to provide a connectivity option.

A 14-slot chassis typically uses 14 base interface channels (13 for other slots plus one for the ShMC). However, the specification defines 16 total channels for the base interface. The second port from each CMM can be routed to an unused upper channel of the opposite hub or fabric board.

Figure 13. Ethernet Port Poaching

CMM 1

LAN A LAN B

Ethernet

Fabric A

Port 0

Port 1

...

Port 14

Port 15

CMM 2

LAN A LAN B

Ethernet

Fabric B

Port 0

Port 1

...

Port 14

Port 15

	Intel NetStructure® MPCMM0002 Chassis Management Module
July 2007	Hardware TPS
Order Number: 309247-004US	31