lan9117 Standard Microsystems Corp., lan9117 Datasheet - Page 54

• Manufacturer Part Number: lan9117
• Description: Lan9117 High-performance Single-chip 10/100 Non-pci Ethernet Controller
• Manufacturer: Standard Microsystems Corp.

Revision 1.5 (07-11-08)
TX Com m and 'A'
Buff er End Alignment = 1
Data Start Of fset = 7
First Segment = 1
Last Segment = 0
Buff er Size = 79
TX Com m and 'B'
Packet Length = 111
TX Com m and 'A'
Buff er End Alignment = 1
Data Start Of fset = 0
First Segment = 0
Last Segment = 0
Buff er Size = 15
TX Com m and 'B'
Packet Length = 111
TX Com m and 'A'
Buff er End Alignment = 1
Data Start Of fset = 10
First Segment = 0
Last Segment = 1
Buff er Size = 17
TX Com m and 'B'
Packet Length = 111
Note 3.16 The LAN9117 host bus interface supports 16-bit bus transfers; internally, all data paths are
32-bits wide.
atomic 16-bit transactions.
31
31
31
Ethernet Controller
Data W ritten 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 DW ORD 1
End Padding
Figure 3.15
10-Byte
10-Byte
10-Byte
Figure 3.15 TX Example 1
DATASHEET
and
1B
54
High Performance Single-Chip 10/100 Non-PCI Ethernet Controller
Figure 3.16
0
0
0
describe the host write ordering for pairs of
Data Passed to the
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 buff ers are
not transmitted
SMSC LAN9117
Datasheet