LAN9313 Datasheet, PDF (355/398 Pages) SMSC Corporation – Three Port 10/100 Managed Ethernet Switch with MII

Three Port 10/100 Managed Ethernet Switch with MII
Datasheet
13.3.3.40 Switch Engine Interrupt Pending Register (SWE_IPR)
Register #:
1881h
Size:
32 bits
This register contains the Switch Engine interrupt status. The status is double buffered. All interrupts
in this register may be masked via the Switch Engine Interrupt Mask Register (SWE_IMR) register.
Refer to Chapter 5, "System Interrupts," on page 52 for more information.
BITS
DESCRIPTION
31:15 RESERVED
14:11
Drop Reason B
When bit 8 is set, these bits indicate the reason a packet was dropped per
the table below:
TYPE
RO
RC
BIT
VALUES
DESCRIPTION
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
Admit Only VLAN was set and the packet was untagged or priority tagged.
The destination address was not in the ALR table (unknown or broadcast),
Enable Membership Checking on ingress was set, Admit Non Member was
cleared and the source port was not a member of the incoming VLAN.
The destination address was found in the ALR table but the source port was
not in the forwarding state.
The destination address was found in the ALR table but the destination port
was not in the forwarding state.
The destination address was found in the ALR table but Enable Membership
Checking on ingress was set and the destination port was not a member of the
incoming VLAN.
The destination address was found in the ALR table but the Enable
Membership Checking on ingress was set, Admit Non Member was cleared and
the source port was not a member of the incoming VLAN.
Drop Unknown was set and the destination address was a unicast but not in
the ALR table.
Filter Multicast was set and the destination address was a multicast and not in
the ALR table.
The packet was a broadcast but exceeded the Broadcast Throttling limit.
The destination address was not in the ALR table (unknown or broadcast) and
the source port was not in the forwarding state.
The destination address was found in the ALR table but the source and
destination ports were the same.
The destination address was found in the ALR table and the Filter bit was set
for that address.
RESERVED
RESERVED
A packet was received with a VLAN ID of FFFh
RESERVED
DEFAULT
-
0h
SMSC LAN9313/LAN9313i
355
DATASHEET
Revision 1.2 (04-08-08)