Atmel Xplained Pro Evaluation Kit ATSAM4E-XPRO ATSAM4E-XPRO Data Sheet

SAM4E [DATASHEET]

Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14

1208

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.

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.

The TSU consists of a timer and registers to capture the time at which PTP event frames cross the message
timestamp point. An interrupt is issued when a capture register is updated.

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

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

Preamble/SFD

55555555555555D5

DA (Octets 0–5)

0180C200000E

SA (Octets 6–11)

—

Type (Octets 12–13)

88F7

message type (Octet 14)

00

version PTP (Octet 15)

02