Kontron AT8050 User Manual download pdf (Page 41)

25 AT8050

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•Fully compliant PCI-Express hot plug support

•Provision for telecom clocks on TCLKA, B, C, D

•SAS link from RTM connector

•Compliant to AMC.0, AMC.1, AMC.2 and AMC.3

•Serial Port (AMC port 15)

•50W maximum power budget

As per AMC.1 R2.0, the carrier board is required to provide PCIe 100MHz reference clock to the AMC on FCLKA.

However, modules are not required to use it. Kontron recommends using AMC-Express modules that use the

reference clock on FCLKA. If the module makes its own reference clock, then the spread spectrum of PCI-

Express clock synthetizer will be disabled by e-keying; otherwise the behavior of the PCI-Express link will be

erratic.

The SAS interface on port 2 allows to use a SAS AMC storage mezzanine on the AT8050 and also

accommodates SATA drives. AMC SATA/SAS electrical path are properly design for Hot Swap operation but

special care must be taken to ensure proper un-mount sequence within the operating system.

AMC port 3 is supplied by the RTM for SAS connectivity.

The telco clock signals allow the AT8050 to provide clocks to the AMC on TCLKA and TCLKC. It also allows an

AMC to retrieve a clock and to provide it to the system through TCLKB and TCLKD. For possible clock frequency

and connection with the backplane, refer to section Telecom Clock Option.

Note:

All electromagnetic compatibility testing has been done with spread spectrum. Disabling the spread

spectrum can complicate EMC.

BIOS Settings:

Advanced --> Drives Configuration

Advanced --> Expansion ROM Configuration

Advanced --> PCI Express Configuration

System Management --> OEM E-Keying Configuration

Software Usage:

To access the SAS BIOS press “CTRL-C” when the board boots.

You can also access the SAS controller by using the LSI Util (Linux Tool)

Software Usage:

AMC serial port is available on port 15.

AMC serial port GUID : 471C5D14-2AE7-42B9-A9B0-0628546B42CC

Signal Path:

To use the SAS interface, an RTM8050 must be installed.

Note:

The maximum power budget is 50W for an Advanced Mezzanane Card.

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Kontron AT8050 User Manual Page 41