Manual

75 AT8050
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4.3.4 Clock E-Keying Information
The clock ekeying is used to find and activate matching clock pairs to/from available clock sources and clock
receivers.
The board has a clock generator used as the (PCIe) FCLKA of AMC B1. Additionally, clocks from/to the ATCA
backplane can be driven to/from the AMC B1 site using an on-carrier clock multiplexer.
The following table gives the clock resources id assignment mapping.
Table 4-33:Clock resources id assignment mapping
4.3.4.1 Clock Point-To-Point Connectivity Information
The following table gives all the clock link paths available on the Front Board Unit, as they appear in the FRU
data in the Carrier Clock Point-to-Point Connectivity Record Table record.
Table 4-34:Carrier Clock Point-to-Point Connectivity Record Table
OnBoard Clock Device Clock Resource Id
PCIe Clock Generator 0
Clock Multiplexer 1
Field Value Description
Record Type ID C0h
Record format version 02h
Record Length *Calculated
Record Checksum *Calculated
Header Checksum *Calculated
Manufacturer ID 00315Ah PICMG Record ID
PICMG Record ID 2Ch Carrier Clock Point-To-Point Connectivity Record
Record Format Version 00h
Clock Point-To-Point Resource Descriptor Count (m) 0x02
Clock Point-To-Point Resource Descriptor
Clock Resource Id 0x00
7:6 00b = On-Carrier device
5:4 0h (reserved)
3:0 On-Carrier Device 0 ( PCIe clock generator )
Clock Point-to-Point Connection Count 0x01
Point-to-Point Clock Connection descriptor
Local Clock Id 0x00 On-Carrier Clock Id 0
Remote Clock Id 0x05 AMC.0 R2.0 FCLKA clock
Remote Clock Resource Id 0x45
7:6 01b = AMC
5:4 0h (reserved)
3:0 AMC Site Number ( 5 = AMC B1)
Clock Point-To-Point Resource Descriptor