LAN9312 Datasheet, PDF (411/458 Pages) SMSC Corporation – High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface

High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Datasheet
BITS
DESCRIPTION
10:9 Source Port B
When bit 8 is set, these bits indicate the source port on which the packet
was dropped.
00 = Port 0
01 = Port 1
10 = Port 2
11 = RESERVED
8 Set B Valid
When set, bits 14:9 are valid.
7:4 Drop Reason A
When bit 1 is set, these bits indicate the reason a packet was dropped. See
the Drop Reason B description above for definitions of each value of this
field.
3:2 Source port A
When bit 1 is set, these bits indicate the source port on which the packet
was dropped.
00 = Port 0
01 = Port 1
10 = Port 2
11 = RESERVED
1 Set A Valid
When set, bits 7:2 are valid.
0 Interrupt Pending
When set, a packet dropped event(s) is indicated.
TYPE
RC
RC
RC
RC
RC
RC
DEFAULT
00b
0b
0h
00b
0b
0b
SMSC LAN9312
411
DATASHEET
Revision 1.2 (04-08-08)