lan9215i Standard Microsystems Corp., lan9215i Datasheet - Page 53

• Manufacturer Part Number: lan9215i
• Description: Lan9215i 16-bit Non-pci 10/100 Ethernet Controller With Hp Auto-mdix And Industrial Temperature Support
• Manufacturer: Standard Microsystems Corp.

16-bit Non-PCI 10/100 Ethernet Controller with HP Auto-MDIX and Industrial Temperature Support
Datasheet
SMSC LAN9215i
Figure 3.14, "TX Example 1"
how data is passed to the TX data FIFO.
Note 3.16 The LAN9215i host bus interface supports 16-bit bus transfers; internally, all data paths
TX Com m and 'A'
Buffer End Alignment = 1
Data Start Offset = 7
First Segment = 1
Last Segment = 0
Buffer Size = 79
TX Com m and 'B'
Packet Length = 111
TX Com m and 'A'
Buffer End Alignment = 1
Data Start Offset = 0
First Segment = 0
Last Segment = 0
Buffer Size = 15
TX Com m and 'B'
Packet Length = 111
TX Com m and 'A'
Buffer End Alignment = 1
Data Start Offset = 10
First Segment = 0
Last Segment = 1
Buffer Size = 17
TX Com m and 'B'
Packet Length = 111
are 32-bits wide.
atomic 16-bit transactions.
31
31
31
Ethernet Controller
Data Written to the
7-Byte Data Start Offset
17-Byte Payload Data
5-Byte End Padding
End Offset Padding
Data Start Offset
TX Command 'A'
TX Command 'B'
TX Command 'A'
TX Command 'B'
TX Command 'A'
TX Command 'B'
79-Byte Payload
15-Byte Payload
Pad DWORD 1
End Padding
10-Byte
10-Byte
10-Byte
Figure 3.14
illustrates the TX command structure for this example, and also shows
Figure 3.14 TX Example 1
DATASHEET
1B
and
53
0
0
0
Figure 3.15
Data Passed to the
describe the host write ordering for pairs of
TX Data FIFO
TX Command 'A'
TX Command 'B'
TX Command 'A'
TX Command 'A'
79-Byte Payload
15-Byte Payload
17-Byte Payload
NOTE: Extra bytes
betw een buffers are
not transmitted
Revision 2.3 (08-06-08)