lan9220 Standard Microsystems Corp., lan9220 Datasheet - Page 65

• Manufacturer Part Number: lan9220
• Description: 16-bit Non-pci Small Form Factor 10/100 Ethernet Controller With Variable Voltage I/o & Hp Auto-mdix Support
• Manufacturer: Standard Microsystems Corp.

16-bit Non-PCI Small Form Factor 10/100 Ethernet Controller with Variable Voltage I/O & HP Auto-MDIX Support
Datasheet
SMSC LAN9220
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
31
DATASHEET
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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Revision 2.6 (12-04-08)