lan9312 Standard Microsystems Corp., lan9312 Datasheet - Page 63
lan9312
Manufacturer Part Number
lan9312
Description
Lan9312 High Performance Two Port 10/100 Managed Ethernet Switch With 32-bit Non-pci Cpu Interface
Manufacturer
Standard Microsystems Corp.
Datasheet
1.LAN9312.pdf
(458 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
lan9312-NU
Manufacturer:
Microchip Technology
Quantity:
10 000
Company:
Part Number:
lan9312-NZW
Manufacturer:
Standard
Quantity:
143
Company:
Part Number:
lan9312-NZW
Manufacturer:
Microchip Technology
Quantity:
10 000
- Current page: 63 of 458
- Download datasheet (6Mb)
High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Datasheet
SMSC LAN9312
Bit
6.4
6.4.1
Valid
56
Override
The switch engine (SWE) is a VLAN layer 2 (link layer) switching engine supporting 3 ports. The SWE
supports the following types of frame formats: untagged frames, VLAN tagged frames, and priority
tagged frames. The SWE supports both the 802.3 and Ethernet II frame formats.
The SWE provides the control for all forwarding/filtering rules. It handles the address learning and
aging, and the destination port resolution based upon the MAC address and VLAN of the packet. The
SWE implements the standard bridge port states for spanning tree and provides packet metering for
input rate control. It also implements port mirroring, broadcast throttling, and multicast pruning and
filtering. Packet priorities are supported based on the IPv4 TOS bits and IPv6 Traffic Class bits using
a DIFFSERV Table mapping, the non-DIFFSERV mapped IPv4 precedence bits, VLAN priority using
a per port Priority Regeneration Table, DA based static priority, and Traffic Class mapping to one of 4
QoS transmit priority queues.
The following sections detail the various features of the switch engine.
MAC Address Lookup Table
The Address Logic Resolution (ALR) maintains a 1024 entry MAC Address Table. The ALR searches
the table for the destination MAC address. If the search finds a match, the associated data is returned
indicating the destination port or ports, whether to filter the packet, the packets priority (used if
enabled), and whether to override the ingress and egress spanning tree port state.
the ALR table entry structure. Refer to the
(SWE_ALR_WR_DAT_0)
detailed descriptions of these bits.
Switch Engine (SWE)
Age /
55
Total multicast packets
Total packets with a late collision
Total packets with excessive collisions
Total packets with a single collision
Total packets with multiple collisions
Total collision count
Static
54
Filter
53
Figure 6.3 ALR Table Entry Structure
(Section 14.5.2.42, on page
and
(Section 14.5.2.37, on page
52
Switch Engine ALR Write Data 1 Register (SWE_ALR_WR_DAT_1)
Priority
DATASHEET
(Section 14.5.2.38, on page
51
(Section 14.5.2.40, on page
(Section 14.5.2.41, on page
(Section 14.5.2.39, on page
63
50
Switch Engine ALR Write Data 0 Register
364)
359)
Port
49
48
360)
362)
363)
361)
47
MAC Address
Revision 1.2 (04-08-08)
Figure 6.3
...
displays
0
for
Related parts for lan9312
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Interface, Integrated USB2.0 Compatible 3-Port Hub
Manufacturer:
Standard Microsystems Corp.
Datasheet:
Part Number:
Description:
Lan91c100fd Rev. B Feast Fast Ethernet Controller With Full Duplex Capability
Manufacturer:
Standard Microsystems Corp.
Datasheet:
Part Number:
Description:
Feast ? Ast Ethernet Controller
Manufacturer:
Standard Microsystems Corp.
Datasheet:
Part Number:
Description:
Com20022i 10 Mbps Arcnet Ansi 878.1 Controller With 2k X 8 On-chip Ram
Manufacturer:
Standard Microsystems Corp.
Part Number:
Description:
Lpc47n207 Lpc Super I/o Irda Hot Docking Chip With Uart Data Brief
Manufacturer:
Standard Microsystems Corp.
Datasheet:
Part Number:
Description:
Advanced I/o With X-bus Interface
Manufacturer:
Standard Microsystems Corp.
Datasheet:
Part Number:
Description:
Fdc37m707 Enhanced Super I/o Controller With Wake-up Features
Manufacturer:
Standard Microsystems Corp.
Datasheet:
Part Number:
Description:
Twenty Pin Uart Tpuart Corporation
Manufacturer:
Standard Microsystems Corp.
Datasheet:
Part Number:
Description:
Enhanced Small Device Interface Controller
Manufacturer:
Standard Microsystems Corp.
Part Number:
Description:
Rpm-based Pwm Fan Controller
Manufacturer:
Standard Microsystems Corp.
Datasheet:
Part Number:
Description:
Rpm-based Pwm Fan Controller
Manufacturer:
Standard Microsystems Corp.
Datasheet:
Part Number:
Description:
Emc1001 1.5?c Smbus Temperature Sensor In Miniature Sot-23
Manufacturer:
Standard Microsystems Corp.
Datasheet:
Part Number:
Description:
1 Degree C Triple Temperature Sensor With Beta Compensation And Hotter Of Two Zones
Manufacturer:
Standard Microsystems Corp.
Datasheet:
Part Number:
Description:
1 Degree C Multiple Temperature Sensor With Beta Compensation And Hottest Of Thermal Zones
Manufacturer:
Standard Microsystems Corp.
Datasheet:
Part Number:
Description:
1 Degree C Triple Temperature Sensor With Resistance Error Correction & Hotter Of Two Zones
Manufacturer:
Standard Microsystems Corp.
Datasheet: