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| K60P100M100SF2RM Datasheet, PDF (1218/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual | |||
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Functional Description
Table 44-85. Receive Buffer Descriptor Field Definitions (continued)
Word
Offset + 18
â
Offset + 1E
Field
15â0
Description
Reserved, must be cleared.
1. The receive buffer pointer, containing the address of the associated data buffer, must always be evenly divisible by 16.
The buffer must reside in memory external to the MAC. The Ethernet controller never modifies this value.
44.4.14.2 Enhanced Transmit Buffer Descriptor
This section discusses the enhanced uDMA transmit buffer descriptor.
NOTE
The following addresses are shown for a big endian
implementation.
Table 44-86. Enhanced Transmit Buffer Descriptor (TxBD)
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Offset + 0 R TO1 W TO2 L TC â â â â â â â â â â
Offset + 2
Data Length
Offset + 4
Tx Data Buffer Pointer - A[31:16]
Offset + 6
Tx Data Buffer Pointer - A[15:0]
Offset + 8 â
INT
TS
PIN
S
IINS
â
â
â
â
â
â
â
â
â
â
â
Offset + A TXE â UE EE FE LCE OE TSE â â â â â â â â
Offset + C â â â â â â â â â â â â â â â â
Offset + E â â â â â â â â â â â â â â â â
Offset + 10 BDU â â â â â â â â â â â â â â â
Offset + 12 â â â â â â â â â â â â â â â â
Offset + 14
1588 timestamp [31:16]
Offset + 16
1588 timestamp [15:0]
Offset + 18 â â â â â â â â â â â â â â â â
Offset + 1A â â â â â â â â â â â â â â â â
Offset + 1C â â â â â â â â â â â â â â â â
Offset + 1E â â â â â â â â â â â â â â â â
1218
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.
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