MPC8536-RDK Freescale Semiconductor, MPC8536-RDK Datasheet - Page 913

• Manufacturer Part Number: MPC8536-RDK
• Description: BOARD REF COMEXPRESS MPC8536
• Manufacturer: Freescale Semiconductor
• Series: PowerQUICC ™r
• Type: MPUr

Specifications of MPC8536-RDK

• Contents: CSB1880, CSB1801, Cables, Documentation, Enclosure, Power Supply with cord
• For Use With/related Products: MPC8536
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

14.6.3.5.1
To substitute a custom preamble, the user must ensure that:
The definition of the 8-byte custom preamble sequence is shown in
The fields of the custom preamble sequence are described in
preamble octets matching the standard start of frame delimiter (0xD5) can be expected to trigger premature
frame reception by the receiving station.
14.6.3.5.2
To return the received preamble, the user must ensure that:
Freescale Semiconductor
Bytes
Byte Offsets
0–1
2–3
4–5
6–7
•
•
•
•
•
0–1
2–3
4–5
6–7
MACCFG2[PreAm TxEN] bit is set
The first TxBD of every frame containing a custom preamble has its PRE bit set
An 8-byte custom preamble sequence appears before the Ethernet DA field in the first transmit data
buffer
MACCFG2[PreAm RxEN] bit is set
Space for an 8-byte preamble sequence is allowed before the Ethernet DA field in the first receive
data buffer of each frame
8–15
8–15
8–15
8–15
Bits
0–7
0–7
0–7
0–7
User-Defined Preamble Transmission
User-Visible Preamble Reception
0
PreOct0 Octet #0 of custom transmit preamble. This is the first octet of preamble sent.
PreOct1 Octet #1 of custom transmit preamble. This is the second octet of preamble sent.
PreOct2 Octet #2 of custom transmit preamble. This is the third octet of preamble sent.
PreOct3 Octet #3 of custom transmit preamble. This is the fourth octet of preamble sent.
PreOct4 Octet #4 of custom transmit preamble. This is the fifth octet of preamble sent.
PreOct5 Octet #5 of custom transmit preamble. This is the sixth octet of preamble sent.
PreOct6 Octet #6 of custom transmit preamble. This is the seventh octet of preamble sent. The last octet
Name
—
MPC8536E PowerQUICC III Integrated Processor Reference Manual, Rev. 1
1
(the start of frame delimiter) is generated by the MAC automatically.
Reserved; should be cleared.
Figure 14-141. Definition of Custom Preamble Sequence
2
Table 14-150. Custom Preamble Field Descriptions
PreOct0
PreOct2
PreOct4
PreOct6
3
4
5
6
7
Description
8
Table
9
14-150. It should be noted that use of
Figure
Enhanced Three-Speed Ethernet Controllers
10
14-141.
11
PreOct1
PreOct3
PreOct5
12
13
14
14-165
15