LAN9215-MT SMSC, LAN9215-MT Datasheet - Page 47

• Manufacturer Part Number: LAN9215-MT
• Description: CONTROLLER, ENET, NON-PCI, 100TQFP
• Manufacturer: SMSC

Specifications of LAN9215-MT

• Data Rate: 100Mbps
• No. Of Ports: 2
• Ethernet Type: IEEE 802.3 / 802.3u
• Supply Current: 40mA
• Supply Voltage Range: 2.97V To 3.63V
• Operating Temperature Range: 0°C To +70°C
• Digital Ic Case Style: TQFP
• Interface Type: HBI
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Highly Efficient Single-Chip 10/100 Ethernet Controller with HP Auto-MDIX and Industrial Temperature Support
Datasheet
SMSC
3.12.1
LAN9215i
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
DATASHEET
Command
(optional)
available
Padding
Check
space
Buffer
Write
Write
Write
FIFO
Start
Idle
init
TX
47
TX Status
Available
Not Last Buffer
(optional)
Read TX
Status
Revision 1.93 (12-12-07)