KSZ8842-32MVL Micrel Inc, KSZ8842-32MVL Datasheet - Page 33
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KSZ8842-32MVL
Manufacturer Part Number
KSZ8842-32MVL
Description
2-Port Ethernet Switch/Repeater + Generic (32-bit) Bus Interface( )
Manufacturer
Micrel Inc
Specifications of KSZ8842-32MVL
Controller Type
Ethernet Switch Controller
Interface
PCI
Voltage - Supply
3.1 V ~ 3.5 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
128-LQFP
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
Data Rate (typ)
10/100Mbps
Vlan Support
Yes
Operating Temperature (max)
70C
Operating Temperature (min)
0C
Pin Count
128
Mounting
Surface Mount
Jtag Support
No
Operating Supply Voltage (max)
3.5V
Operating Supply Voltage (min)
3.1V
Operating Temperature Classification
Commercial
Data Rate
100Mbps
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
576-1635 - BOARD EVALUATION KSZ8842-16MVL
Current - Supply
-
Lead Free Status / RoHS Status
Compliant, Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
KSZ8842-32MVLI
Manufacturer:
Micrel
Quantity:
915
Forwarding
The KSZ8842M forwards packets using the algorithm that is depicted in the following flowcharts. Figure 10 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 11.
The packet is sent to PTF2.
Micrel, Inc.
October 2007
Figure 10. Destination Address Lookup Flow Chart in Stage One
Dynamic MAC Table
Search complete.
Static MAC Table
Search complete.
Get PTF1 from
Get PTF1 from
PTF1 = NULL
FOUND
FOUND
NO
33
Search complete.
Dynamic Table
Get PTF1 from
Search Static
VLAN table
VLAN ID
Search
valid?
Table
PTF1
Start
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
KSZ8842-16/32 MQL/MVL/MVLI/MBL
M9999-102207-1.9