LAN9312 datasheet(410/458 Pages) SMSC

410 / 458 page

High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface

Datasheet

Revision 1.2 (04-08-08)

410

SMSC LAN9312

DATASHEET

14.5.3.40

Switch Engine Interrupt Pending Register (SWE_IPR)

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 49 for more information.

1881h

Size:

32 bits

BITS

DESCRIPTION

TYPE

DEFAULT

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:

BIT

VALUES

DESCRIPTION

0000

Admit Only VLAN was set and the packet was untagged or priority tagged.

0001

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.

0010

The destination address was found in the ALR table but the source port was

not in the forwarding state.

0011

The destination address was found in the ALR table but the destination port

was not in the forwarding state.

0100

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.

0101

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.

0110

Drop Unknown was set and the destination address was a unicast but not in

the ALR table.

0111

Filter Multicast was set and the destination address was a multicast and not in

the ALR table.

1000

The packet was a broadcast but exceeded the Broadcast Throttling limit.

1001

The destination address was not in the ALR table (unknown or broadcast) and

the source port was not in the forwarding state.

1010

The destination address was found in the ALR table but the source and

destination ports were the same.

1011

The destination address was found in the ALR table and the Filter bit was set

for that address.

1100

RESERVED

1101

RESERVED

1110

A packet was received with a VLAN ID of FFFh

1111

RESERVED

LAN9312 Datasheet(PDF) 410 Page - SMSC Corporation

LAN9312 Datasheet(HTML) 410 Page - SMSC Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL