STE100A ST Microelectronics, Inc., STE100A Datasheet - Page 15
STE100A
Manufacturer Part Number
STE100A
Description
PCI 10/100 Ethernet Controller with Integrated PHY (3.3v)
Manufacturer
ST Microelectronics, Inc.
Datasheet
1.STE100A.pdf
(82 pages)
- Current page: 15 of 82
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STE10/100A
3.2.2
Descriptor management
OWN bit = 1, ready for network side access
OWN bit = 0, ready for host side access
Transmit descriptors
Figure 7.
Ext packet to be transmitted
Ext packet to be transmitted
Own bit=1,
Own bit=1,
packet 1 and packet 2
packet 1 and packet 2
are ready to transmit
are ready to transmit
Empty descriptor pointer
Empty descriptor pointer
Transmit descriptor management
Descriptor ring
Descriptor ring
End of ring
End of ring
0
0
1
1
1
1
1
1
0
0
0
0
Buffer 1 pointer
Buffer 1 pointer
Buffer 2 pointer
Buffer 2 pointer
Packet1
Packet1
Packet1
Packet1
Packet2
Packet2
Length 2
Length 2
·
·
·
·
·
·
Length1
Length1
Functional description
Data buffer
Data buffer
Data
Data
Data
Data
PC00352
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