LAN9313-NZW SMSC, LAN9313-NZW Datasheet - Page 80
![Ethernet ICs Three Port 10/100 Ethernet Switch](/photos/27/13/271356/lan9313_sml.jpg)
LAN9313-NZW
Manufacturer Part Number
LAN9313-NZW
Description
Ethernet ICs Three Port 10/100 Ethernet Switch
Manufacturer
SMSC
Type
Three Port Managed Ethernet Switchr
Datasheet
1.LAN9313-NZW.pdf
(399 pages)
Specifications of LAN9313-NZW
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)
3.6 V
Supply Voltage (min)
0 V
Supply Current (max)
155 mA, 270 mA
Maximum Operating Temperature
+ 70 C
Package / Case
TQFP-100
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LAN9313-NZW
Manufacturer:
Microchip Technology
Quantity:
10 000
Part Number:
LAN9313-NZW
Manufacturer:
SMSC
Quantity:
20 000
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Revision 1.7 (06-29-10)
6.5.6
EGRESS RATE
SETTING
1589
3973
7947
158
396
794
0-3
12
19
39
78
4
5
6
7
9
Note: Egress rate limiting occurs before the
The egress limiting is enabled per priority queue. After a packet is selected to be sent, its length is
recorded. The switch then waits a programmable amount of time, scaled by the packet length, before
servicing that queue once again. The amount of time per byte is programmed into the Buffer Manager
Egress Rate registers (refer to
definitions). The value programmed is in approximately 20 nS per byte increments. Typical values are
listed in
limiting the rate.
Note 6.3
Adding, Removing, and Changing VLAN Tags
Based on the port configuration and the received packet formation, a VLAN tag can be added to,
removed from, or modified in a packet. There are four received packet type cases: non-tagged, priority-
tagged, normal-tagged, and CPU special-tagged. There are also four possible settings for an egress
port: dumb, access, hybrid, and CPU. In addition, each VLAN table entry can specify the removal of
the VLAN tag (the entry’s un-tag bit).
The tagging/un-tagging rules are specified as follows:
Dumb Port - This port type generally does not change the tag.
When a received packet is non-tagged, priority-tagged, or normal-tagged, the packet passes
untouched.
When a packet is received special-tagged from a CPU port, the special tag is removed.
Access Port - This port type generally does not support tagging.
When a received packet in non-tagged, the packet passes untouched.
When a received packet is priority-tagged or normal-tagged, the tag is removed.
priority queue will be serviced if a higher priority queue is being rate limited.
Table
TIME PER BYTE
These are the unlimited max bandwidths when IFG and preamble are taken into account.
158960 nS
15900 nS
31800 nS
79480 nS
1580 nS
3180 nS
7940 nS
6.5. When a port is transmitting at 10 Mbps, any setting above 39 has the effect of not
100 nS
120 nS
140 nS
160 nS
200 nS
260 nS
400 nS
800 nS
80 nS
Table 6.5 Typical Egress Rate Settings
76 Mbps
64 BYTE PACKET
BANDWIDTH @
Section 13.3.4.14
DATASHEET
870 Kbps
440 Kbps
220 Kbps
8.6 Mbps
4.4 Mbps
2.2 Mbps
66 Mbps
55 Mbps
48 Mbps
42 Mbps
34 Mbps
26 Mbps
17 Mbps
87 Kbps
44 Kbps
(Note
80
Transmit Priority Queue
6.3)
through
512 BYTE PACKET
96 Mbps
BANDWIDTH @
990 Kbps
490 Kbps
250 Kbps
2.5 Mbps
78 Mbps
65 Mbps
56 Mbps
49 Mbps
39 Mbps
30 Mbps
20 Mbps
10 Mbps
98 Kbps
49 Kbps
5 Mbps
Section 13.3.4.19
Three Port 10/100 Managed Ethernet Switch with MII
(Note
6.3)
Servicing, such that a lower
SMSC LAN9313/LAN9313i
1518 BYTE PACKET
99 Mbps
BANDWIDTH @
for detailed register
500 Kbps
250 Kbps
100 Kbps
2.5 Mbps
80 Mbps
67 Mbps
57 Mbps
50 Mbps
40 Mbps
31 Mbps
20 Mbps
10 Mbps
50 Kbps
5 Mbps
1 Mbps
(Note
Datasheet
6.3)
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