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Intel
IXF1104 4-Port Gigabit Ethernet Media Access Controller
Figure 7. Packet Buffering FIFO
SPI3 Interface
High Watermark
MAC Transfer Threshold
High Watermark
TXPAUSEFR (External
5.1.2.1.1
PAUSE frames are MAC control frames that are padded to the minimum size (64 bytes).
and
Figure 9
Figure 8. Ethernet Frame Format
Number of bytes
64 yte Minimum / 1518 bytes Maximum
Note:
71
Low Watermark
Low Watermark
Strobe)
Pause Frame Format
illustrate the frame format and contents.
7
1
6
S
Preamble
F
DA
D
TX FIFO
Data Flow
Data Flow
RX FIFO
RX FIFO High
802.3 Flow
Control
802.3x Pause Frame Generation
6
2
Type/
SA
Length
Ethernet Frame
MDI
TX Side
MAC
RX Side
MAC
B3231-01
Figure 8
46-1500
4
Data
FCS
2277-02
Datasheet
Document Number: 278757
Revision Number: 009
Revision Date: 27-Oct-2005
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