LAN9353 Datasheet, PDF (321/523 Pages) Microchip Technology – Interfaces at up to 200Mbps via Turbo MII

LAN9353
10.7.3.41 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). Refer to Section 8.0, "System Interrupts," on
page 84 for more information.
Bits
Description
31:15 RESERVED
14:11
Drop Reason B
When the Set B Valid bit is set, these bits indicate the reason a packet was
dropped per the table below:
Bit
Values
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
Description
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
Type
RO
RC
Default
-
0000b
 2015 Microchip Technology Inc.
DS00001925A-page 321