LAN9220-ABZJ Standard Microsystems (SMSC), LAN9220-ABZJ Datasheet - Page 50
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LAN9220-ABZJ
Manufacturer Part Number
LAN9220-ABZJ
Description
10/100 NON-PCI ETHERNET CONTROLLER
Manufacturer
Standard Microsystems (SMSC)
Datasheet
1.LAN9220-ABZJ.pdf
(151 pages)
Specifications of LAN9220-ABZJ
Operating Supply Voltage (typ)
1.8/3.3V
Operating Supply Voltage (max)
3.6V
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Pin Count
56
Lead Free Status / RoHS Status
Compliant
Available stocks
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Manufacturer
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Part Number:
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Part Number:
LAN9220-ABZJ
Manufacturer:
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Revision 2.7 (03-15-10)
3.12.1
TX Buffer Format
TX buffers exist in the host’s memory in a given format. The host writes a TX command word into the
TX data buffer before moving the Ethernet packet data. The TX command A and command B are 32-
bit values that are used by the LAN9220 in the handling and processing of the associated Ethernet
packet data buffer. Buffer alignment, segmentation and other packet processing parameters are
included in the command structure. The following diagram illustrates the buffer format.
Last Buffer in
Figure 3.13 Simplified Host TX Flow Diagram
Packet
16-bit Non-PCI Small Form Factor 10/100 Ethernet Controller with Variable Voltage I/O & HP Auto-MDIX Support
DATASHEET
Command
(optional)
available
Padding
Check
space
Buffer
Write
FIFO
Write
Write
Start
Idle
init
TX
50
TX Status
Available
Not Last Buffer
(optional)
Read TX
Status
SMSC LAN9220
Datasheet
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