lan9221 Standard Microsystems Corp., lan9221 Datasheet - Page 66

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

Revision 2.6 (12-04-08)
3.13.3
29:16
BITS
9:8
31
30
15
14
13
12
10
11
Reserved. This bit is reserved. Reads 0.
Filtering Fail. When set, this bit indicates that the associated frame failed the address recognizing
filtering.
Packet Length. The size, in bytes, of the corresponding received frame.
Error Status (ES). When set this bit indicates that the MIL has reported an error. This bit is the
Internal logical “or” of bits 11,7,6 and 1.
Reserved. These bits are reserved. Reads 0.
Broadcast Frame. When set, this bit indicates that the received frame has a Broadcast address.
Length Error (LE). When set, this bit indicates that the actual length does not match with the
length/type field of the received frame.
Runt Frame. When set, this bit indicates that frame was prematurely terminated before the collision
window (64 bytes). Runt frames are passed on to the host only if the Pass Bad Frames bit MAC_CR
Bit [16] is set.
Multicast Frame. When set, this bit indicates that the received frame has a Multicast address.
Reserved. These bits are reserved. Reads 0.
RX Status Format
Figure 3.21 RX Packet Format with RX Checksum
Host Read
Order
Last
2nd
1st
DATASHEET
31
ofs + First Data DWORD
Checksum
Optional offset DWORD0
Optional offset DWORDn
Optional Pad DWORD0
Optional Pad DWORDn
Last Data DWORD
RX
DESCRIPTION
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High-Performance 16-bit Non-PCI 10/100 Ethernet Controller with Variable Voltage I/O
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SMSC LAN9221/LAN9221i
Datasheet