lan9221 Standard Microsystems Corp., lan9221 Datasheet - Page 31

• Manufacturer Part Number: lan9221
• Description: High-performance 16-bit Non-pci 10/100 Ethernet Controller With Variable Voltage I/o
• Manufacturer: Standard Microsystems Corp.

High-Performance 16-bit Non-PCI 10/100 Ethernet Controller with Variable Voltage I/O
Datasheet
SMSC LAN9221/LAN9221i
1DWORD
{DSAP, SSAP, CTRL, OUI[23:16]}
Example frame configurations:
1DWORD
DST
0
1DWORD
DST
0
DST
0
1
SRC
1
1
SRC
2
Figure 3.7 Ethernet Frame with Length Field and SNAP Header
SRC
2
2
8
1
0
0
3
p
r
o
t
V
I
D
3
L
e
n
3
t
y
p
e
4
S
N
A
P
0
Figure 3.6 Ethernet Frame with VLAN Tag
4
S
N
A
P
1
Figure 3.5 Type II Ethernet Frame
5
{OUI[15:0], PID[15:0]}
DATASHEET
Calculate Checksum
Calculate Checksum
31
L3 Packet
Calculate Checksum
L3 Packet
L3 Packet
C
S
F
Revision 2.6 (12-04-08)
C
F
S
F
C
S