Specifications

4
Update channel connections to the AMC bay
47
TheconnectionstoPort13ofeachAMCbayareusedforsingle‐endedgeneral‐purposeI/
O(GPIO)signals.ThesignalsonPort13powerupdisabledonboththeAMCandtheCPM,
andareE‐Keyed.TheE‐KeyingfunctionisprovidedbytheIPMContheCPMandtheMMC
ontheAMCmodules.EachcontrolstheenablepinsoftheirrespectivebufferswithGPO
pins.
IfanAMCmodulechoosestousePort13,itmustdriveGPOoutputsontheAMC‐sideTX+
andTX‐pins.Thecorrespondingcarrier‐sideRX+andRX‐signalsareappliedtotheinput
oftheredundantCPMandAMC.Thebuffersdrivethecarrier‐sideTX+andTX‐pinswith
signalsreceivedfromtheredundantCPM.TheAMCmodulereceivesthesesignalsonits
RX+andRX‐pins,andcaneitherconnectthemtoGPIinputsorinterruptinputs.
ThefastpathupdatechannelisillustratedinFigure 10.
Figure 10. AMC bay fast path update channel
Backplane
AMC
Port 12
PM8380_3
I
2
C
Port B[0]
Port A[0]
Port A[1]
IPMC
Port A[3]
Port A[2]
AMC
CPM
CPM
Buffer
I
2
C (Bus 3)
Zone 2
Connector
J20
Update
Channel 0
Zone 2
Connector
J20
Update
Channel 0
Port 12