Cypress S6J3200 Series, Manual

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CHAPTER 21:Ethernet MAC
S6J3200 Series Hardware Manual Document Number: 002-04852 Rev. *G 603
IP DA (Octets 38 - 53) FF0X000000000181h
source IP port (Octets 54 – 55)
dest IP port (Octets 56 – 57) 013Fh
other stuff (Octets 58 – 61)
message type (Octet 62) 00h
other stuff (Octets 63 – 93)
version PTP (Octet 94) 02h
Example of a Pdelay_Req frame in the IEEE Std 1588 version 2 (UDP/IPv6) format:
Preamble/SFD 55555555555555D5
h
DA (Octets 0 – 5)
SA (Octets 6 – 11)
Type (Octets 12 – 13) 86DDh
IP stuff (Octets 14 – 19)
UDP (Octet 20) 11h
IP stuff (Octets 21 – 37)
IP DA (Octets 38 - 53) FF0200000000006Bh
source IP port (Octets 54 – 55)
dest IP port (Octets 56 – 57) 013Fh
other stuff (Octets 58 – 61)
message type (Octet 62) 03h
other stuff (Octets 63 – 93)
version PTP (Octet 94) 02h
Example of a Sync frame in the IEEE Std 1588 version 2 (Ethernet multicast) format. For the multicast
address 011B19000000
h
Sync and Delay_Req frames are recognized depending on the message type
field, 00h for Sync and 01h for Delay_Req:
Preamble/SFD 55555555555555D5
h
DA (Octets 0 – 5) 011B19000000
h
SA (Octets 6 – 11)
Type (Octets 12 – 13) 88F7h
message type (Octet 14) 00h
version PTP (Octet 15) 02h
Example of a Pdelay_Req frame in the IEEE Std 1588 version 2 (Ethernet multicast) format, these need a
special multicast address so they can get through ports blocked by the spanning tree protocol. For the
multicast address 0180C200000E
h
Sync, Pdelay_Req and Pdelay_Resp frames are recognized
depending on the message type field, 00h for Sync, 02h for Pdelay_Req and 03
h
for Pdelay_Resp:
Preamble/SFD 55555555555555D5
h
DA (Octets 0 – 5) 0180C200000E
h
SA (Octets 6 – 11)
Type (Octets 12 – 13) 88F7h
message type (Octet 14) 02h
version PTP (Octet 15) 02h