LAN9215I-MT Standard Microsystems (SMSC), LAN9215I-MT Datasheet - Page 47
LAN9215I-MT
Manufacturer Part Number
LAN9215I-MT
Description
Manufacturer
Standard Microsystems (SMSC)
Datasheet
1.LAN9215I-MT.pdf
(139 pages)
Specifications of LAN9215I-MT
Operating Supply Voltage (typ)
3.3V
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
100
Lead Free Status / RoHS Status
Compliant
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16-bit Non-PCI 10/100 Ethernet Controller with HP Auto-MDIX and Industrial Temperature Support
Datasheet
SMSC LAN9215i
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 LAN9215i 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 3.12 Simplified Host TX Flow Diagram
Packet
Command
DATASHEET
(optional)
available
Padding
Check
space
Buffer
Write
FIFO
Write
Write
Start
Idle
init
TX
47
TX Status
Available
Not Last Buffer
(optional)
Read TX
Status
Revision 2.7 (03-15-10)
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