K60P100M100SF2RM Datasheet, PDF (1185/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

44.4.3.2.2
Chapter 44 10/100-Mbps Ethernet MAC (ENET)
PTPv2 Header
Table 44-72. Common PTPv2 message Header
Bits
Offset
Octets
7
6
5
4
3
2
1
0
0
1
transportSpecific
messageId
1
1
reserved
versionPTP = 0x2
2
2
messageLength
4
1
domainNumber
5
1
reserved
6
2
flags
8
8
correctionField
16
4
reserved
20
10
sourcePortIdentity
30
2
sequenceId
32
1
control
33
1
logMeanMessageInterval
The type of message is encoded in the field messageId as follows:
Table 44-73. PTPv2 Message Type Identification
messageId
0x0
0x1
0x2
0x3
0x4–0x7
0x8
0x9
0xa
0xb
0xc
0xd
Message Name
SYNC
DELAY_REQ
PATH_DELAY_REQ
PATH_DELAY_RESP
—
FOLLOW_UP
DELAY_RESP
PATH_DELAY_FOLLOW_UP
ANNOUNCE
SIGNALING
MANAGEMENT
Message
Event message
Event message
Event message
Event message
reserved
General message
General message
General message
General message
General message
General message
The PTPv2 flags field contains further details on the type of message, especially if one-
step or two-step implementations are used. The flags field consists of two octets with the
following meanings for the bits. Reserved bits are cleared (false).
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.
1185