KSZ8842-PMQLI Micrel Inc, KSZ8842-PMQLI Datasheet - Page 26
KSZ8842-PMQLI
Manufacturer Part Number
KSZ8842-PMQLI
Description
2-Port Ethernet Switch/Repeater + 32-bit/33MHz PCI Bus Interface, Ind Temp ( )
Manufacturer
Micrel Inc
Specifications of KSZ8842-PMQLI
Controller Type
Ethernet Switch Controller
Interface
PCI
Voltage - Supply
3.1 V ~ 3.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
128-MQFP, 128-PQFP
Number Of Primary Switch Ports
2
Internal Memory Buffer Size
32
Operating Supply Voltage (typ)
3.3V
Fiber Support
Yes
Integrated Led Drivers
Yes
Phy/transceiver Interface
MII
Power Supply Type
Analog/Digital
Package Type
PQFP
Data Rate (typ)
10/100Mbps
Vlan Support
Yes
Operating Temperature (max)
85C
Operating Temperature (min)
-40C
Pin Count
128
Mounting
Surface Mount
Jtag Support
No
Operating Supply Voltage (max)
3.5V
Operating Supply Voltage (min)
3.1V
Operating Temperature Classification
Industrial
Data Rate
100Mbps
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
576-1636 - BOARD EVALUATION KSZ8842-PMQL
Current - Supply
-
Lead Free Status / RoHS Status
Compliant, Lead free / RoHS Compliant
Other names
576-2121
KSZ8842-PMQLI
KSZ8842-PMQLI
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
KSZ8842-PMQLI
Manufacturer:
TI
Quantity:
3 100
Micrel, Inc.
Forwarding
The KSZ8842-PMQL/PMBL forwards packets using the algorithm that is depicted in the following flowcharts. Figure 7
shows stage one of the forwarding algorithm where the search engine looks up the VLAN ID, static table, and dynamic
table for the destination address, and comes up with “port to forward 1” (PTF1). PTF1 is then further modified by
spanning tree, IGMP snooping, port mirroring, and port VLAN processes to come up with “port to forward 2” (PTF2), as
shown in Figure 8. The packet is sent to PTF2.
October 2007
Dynamic MAC Table
Search complete.
Static MAC Table
Search complete.
Get PTF1 from
Get PTF1 from
PTF1 = NULL
Figure 7. Destination Address Lookup Flow Chart, Stage 1
FOUND
FOUND
NO
Search complete.
Dynamic Table
Get PTF1 from
Search Static
VLAN table
VLAN ID
Search
valid?
Table
PTF1
Start
26
FOUND
FOUND
YES
NOT
NOT
- Search VLAN table
- Ingress VLAN filtering
- Discard NPVID check
This search is based on
DA or DA+FID
This search is based on
DA+FID
KSZ8842-PMQL/PMBL
M9999-100207-1.5