11850-029
R1.1, July 2021
Backplane
5
3.2 Backplane Features
• GbE Links from MCH to all AMC Slots
• Direct S-ATA / SAS connections:
- AMC 1 <-> AMC 3: Port 2
- AMC 2 <-> AMC 4: Port 3
- AMC 1 & 3: Port 3 <-> SATA Headers on eCLK connector
• Fat pipe and extended fat pipe contains 4 PCIe Gen 3 x4 MUX’s that allows the user to
select through the eMCH two different fat pipe / extended fat pipe configurations
Configuration 1
- AMC1 port 4-5 to AMC4 port 4-5;
- AMC1 port 6-7 to AMC3 port 4-5;
- AMC1 port 8-11 to AMC2 port 4-7;
- AMC2 port 8-11 to AMC4 port 8-11;
- AMC3 port 6-7 to AMC 4 port 6-7
Configuration 2
- AMC1 port 4-5 to AMC4 port 4-5;
- AMC1 port 6-7 to AMC4 port 6-7;
- AMC1 port 8-11 to AMC2 port 4-7;
- AMC2 port 8-11 to AMC4 port 8-11
Note:
As 4 PCIe MUX’s are in the fat pipe / extended fat pipe backplane signal lines, only AMC
modules that support PCIe on fat pipe / extended fat pipe can be installed.
• FCLK for PCIe Gen3 clock generated on backplane
• eMCH / Backplane provide power and cooling unit functionality
3.3 Intelligent Platform Management Bus (IPMB)
MicroTCA uses an Intelligent Platform Management Bus (IPMB) for management
communications.
3.3.1 IPMB-L
Radial IPMB from eMCH to the AMCs.
3.4 Power Management
The integrated power management circuitry on the backplane provides 12 V payload power
distribution branches to the AMC Slots. It also generates the 3.3 V management power and
distributes it to all slots.
The current to the AMC slots is limited to:
• 8 A (Payload Power)
• 250 mA (Management Power)
