Specifications

3
Rear transition module (RTM) interface
29
Rear transition module (RTM) interface
TheCPMincludesthestandardZone3backplaneinterfacetoprovideconnectivitytoan
optionalRTM,suchastheATCA‐5400.Thisinterfaceconsistsoftwoconnectors:J30for
commonandmaintenancesignals,andJ31forSerDes(serialization/deserialization
connectivity).Fordetails,refertoZone3J30connectorpinoutandZone3J31connector
pinoutonpage 146.
TheelectricalconnectionsbetweentheCPMandtheassociatedRTMinclude:
•Switched+12Vpower,underthecontroloftheIPMC
•Switched+3.3VIPMCpower,underthecontroloftheIPMC
•I
2
CmanagementbusfromtheIPMC
•Hotswapcontrolsignals
•OneJTAGboundaryscaninterface
•Switchoversignals
•RTMlinksignals
•Serialport
•I
2
Cmanagementbus,connectedtoI/OControllerHubSMBus
•TwoSerial‐Attached‐SCSI(SAS)channels
•Two1‐GbEthernetinterfacesfromtheCPMfront/rearEthernetcontroller,supporting
SerDesorSGMII
•TwoI
2
Cinterfacesfromthefront/rearEthernetcontrollerforSGMIImodesupport
•Four1‐GbinterfacesfromtheAMCbay,supportingSerDesorSGMII
•OneI
2
CportfromtheAMCbaytoprovideSFPandLEDcontrolfunctions
•OneSATAportfromtheI/OControllerHub(ICH10R)
•RTM_RESET#signalusedtocoldresetICsontheRTM
•Twox4PCIExpressgeneration2portsfromtheIntel5520I/OHub(36D)
TheRTMEthernetportsaredisabledwhen
thefront‐panelEthernetportsareinuse.Refer
toConfiguringthefrontorrearEthernetportsonpage 75formoreinformation.
AcurrentlimitswitchcontrolstheamountofcurrentthattheRTMcandraw.Referto
Powerconsumptiononpage 94formoreinformation.
Other physical interfaces
ForinformationabouttheDDR3DIMMinterface,refertoSupportedDIMMcombinations
onpage 17andtoDDR3SDRAMonpage 34.