LAN9312-NU SMSC, LAN9312-NU Datasheet - Page 383

• Manufacturer Part Number: LAN9312-NU
• Description: Ethernet ICs Hi Per 2 Port 10/100 Ethernet Switch
• Manufacturer: SMSC
• Type: Two Port Managed Ethernet Switchr

Specifications of LAN9312-NU

• Ethernet Connection Type: 10 Base-T, 100 Base-TX
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Product: Ethernet Switches
• Number Of Transceivers: 1
• Standard Supported: 802.3, 802.3u
• Data Rate: 10 Mbps, 100 Mbps
• Supply Voltage (max): 3.3 V
• Supply Voltage (min): 0 V
• Supply Current (max): 185 mA, 295 mA
• Maximum Operating Temperature: + 70 C
• Package / Case: TQFP-100
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Datasheet
SMSC LAN9312
14.5.3.16
31:14
12:10
BITS
13
9
8
7
6
5
4
3
2
1
0
RESERVED
Allow Monitorin Echo
When set, monitored packets are allowed to be echoed back to the source
port. When cleared, monitored packets, like other packets, are never sent
back to the source port.
This bit is useful when the monitoring port wishes to receive it’s own IGMP
packets.
IGMP Monitoring Port
This field is the port bit map where IPv4 IGMP packets are sent.
Use IP
When set, the IPv4 TOS or IPv6 SC field is enabled as a transmit priority
queue choice.
RESERVED
Enable IGMP Monitoring
When set, IPv4 IGMP packets are monitored and sent to the IGMP
monitoring port.
SWE Counter Test
When this bit is set the Switch Engine counters that normally clear to 0 when
read will be set to 7FFF_FFFCh when read.
DA Highest Priority
When this bit is set and the Static bit in the ALR table for the destination
MAC address is set, the transmit priority queue that is selected is taken from
the ALR Priority bits (see the
(SWE_ALR_RD_DAT_1)).
Filter Multicast
When this bit is set, packets with a multicast destination address are filtered
if the address is not found in the ALR table. Broadcasts are not included in
this filter.
Drop Unknown
When this bit is set, packets with a unicast destination address are filtered
if the address is not found in the ALR table.
Use Precedence
When the priority is taken from an IPV4 packet (enabled via the Use IP bit),
this bit selects between precedence bits in the TOS octet or the DIFFSERV
table.
When set, IPv4 packets will use the precedence bits in the TOS octet to
select the transmit priority queue. When cleared, IPv4 packets will use the
DIFFSERV table to select the transmit priority queue.
VL Higher Priority
When this bit is set and VLANs are enabled, the priority from the VLAN tag
has higher priority than the IP TOS/SC field.
VLAN Enable
When set, VLAN ingress rules are enabled. This also enables the VLAN to
be used as the transmit priority queue selection.
Switch Engine Global Ingress Configuration Register (SWE_GLOBAL_INGRSS_CFG)
This register is used to configure the global ingress rules.
Register #:
1840h
Switch Engine ALR Read Data 1 Register
DESCRIPTION
DATASHEET
383
Size:
32 bits
TYPE
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
RO
Revision 1.7 (06-29-10)
DEFAULT
0b
0b
0b
0b
0b
0b
0b
0b
0b
1b
1b
0b
-