Datasheet

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Frame Segment Value
Type (Octets 12–13) 86dd
IP stuff (Octets 14–19) —
UDP (Octet 20) 11
IP stuff (Octets 21–37) —
IP DA (Octets 38–53) FF0200000000006B
Source IP port (Octets 54–55) —
Dest IP port (Octets 56–57) 013F
Other stuff (Octets 58–61) —
Message type (Octet 62) 03
Other stuff (Octets 63–93) —
Version PTP (Octet 94) 02
For the multicast address 011B19000000 sync and delay request frames are recognized depending on
the message type field, 00 for sync and 01 for delay request.
Table 24-11. Example of Sync Frame in 1588 Version 2 (Ethernet Multicast) Format
Frame Segment Value
Preamble/SFD 55555555555555D5
DA (Octets 0–5) 011B19000000
SA (Octets 6–11) —
Type (Octets 12–13) 88F7
Message type (Octet 14) 00
Version PTP (Octet 15) 02
Pdelay request frames need a special multicast address so they can pass through ports blocked by the
spanning tree protocol. For the multicast address 0180C200000E sync, Pdelay_Req and Pdelay_Resp
frames are recognized depending on the message type field, 00 for sync, 02 for pdelay request and 03
for pdelay response.
Table 24-12. Example of Pdelay_Req Frame in 1588 Version 2 (Ethernet Multicast) Format
Frame Segment Value
Preamble/SFD 55555555555555D5
DA (Octets 0–5) 0180C200000E
SA (Octets 6–11) —
Type (Octets 12–13) 88F7
Message type (Octet 14) 00
SAM D5x/E5x Family Data Sheet
GMAC - Ethernet MAC
© 2019 Microchip Technology Inc.
Datasheet
DS60001507E-page 502