LAN9312-NU Standard Microsystems (SMSC), LAN9312-NU Datasheet - Page 130
LAN9312-NU
Manufacturer Part Number
LAN9312-NU
Description
Manufacturer
Standard Microsystems (SMSC)
Datasheet
1.LAN9312-NU.pdf
(458 pages)
Specifications of LAN9312-NU
Number Of Primary Switch Ports
2
Operating Supply Voltage (typ)
3.3V
Fiber Support
No
Phy/transceiver Interface
MII
Power Supply Type
Analog
Data Rate (typ)
10/100Mbps
Vlan Support
Yes
Operating Temperature (max)
70C
Operating Temperature (min)
0C
Pin Count
128
Mounting
Surface Mount
Jtag Support
No
Operating Supply Voltage (max)
3.6V
Operating Supply Voltage (min)
3V
Operating Temperature Classification
Commercial
Data Rate
100Mbps
Lead Free Status / RoHS Status
Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LAN9312-NU
Manufacturer:
Microchip Technology
Quantity:
10 000
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Revision 1.7 (06-29-10)
9.8.6.2
TX Command 'A'
Buffer End Alignment = 0
Data Start Offset = 6
First Segment = 1
Last Segment = 1
Buffer Size =183
TX Command 'B'
Packet Length = 183
TX Example 2
In this example, a single 183-Byte Ethernet packet will be transmitted. This packet is in a single buffer
as follows:
Figure 9.6
to the TX Data FIFO. Note that the packet resides in a single TX Buffer, therefore both the FS and LS
bits are set in TX command ‘A’.
2-Byte “Data Start Offset”
183-Bytes of payload data
4-Byte “Buffer End Alignment”
illustrates the TX command structure for this example, and also shows how data is passed
31
Data Written to the
TX Data FIFO Port
6-Byte Data Start Offset
183-Byte Payload Data
Memory Mapped
TX Command 'A'
TX Command 'B'
3B End Padding
High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Figure 9.6 TX Example 2
DATASHEET
130
0
NOTE: Extra bytes between buffers
are not transmitted
Data Passed to the
183-Byte Payload Data
TX Data FIFO
TX Command 'A'
TX Command 'B'
SMSC LAN9312
Datasheet
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