KSZ8842-16MQL Micrel Inc, KSZ8842-16MQL Datasheet - Page 28

• Manufacturer Part Number: KSZ8842-16MQL
• Description: IC SWITCH 10/100 16BIT 128PQFP
• Manufacturer: Micrel Inc

Specifications of KSZ8842-16MQL

• Data Rate: 100Mbps
• 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-MQFP, 128-PQFP
• No. Of Ports: 1
• Ethernet Type: IEEE 802.3u
• Supply Current: 122mA
• Supply Voltage Range: 3.1V To 3.5V
• Operating Temperature Range: 0°C To +70°C
• Digital Ic Case Style: QFP
• No. Of: RoHS Compliant
• 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): 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
• Interface Type: PCI
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 576-1634 - BOARD EVALUATION KSZ8842-16MQL
• Current - Supply: -
• Lead Free Status / RoHS Status: Compliant, Lead free / RoHS Compliant
• Other names: 576-1478-5

The KSZ8842M will not forward the following packets:
1. Error packets.
2. 802.3x pause frames.
3. "Local" packets.
Micrel Confidential
November 2005
These include framing errors, Frame Check Sequence (FCS) errors, alignment errors, and illegal size packet errors.
The KSZ8842M intercepts these packets and performs the flow control.
Based on destination address (DA) lookup. If the destination port from the lookup table matches the port from which
the packet originated, the packet is defined as "local."
Figure 10. Destination Address Resolution Flow Chart in Stage Two
Spanning Tree
IGMP Process
Membership
Port Mirror
Port VLAN
Process
Process
Check
PTF1
PTF2
- Check receiving port's receive enable bit
- Check destination port's transmit enable bit
- Check whether packets are special (BPDU)
or specified
- Applied to MAC #1 and MAC #2
- IGMP will be forwarded to the host port
- RX Mirror
- TX Mirror
- RX or TX Mirror
- RX and TX Mirror
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KSZ8842-16/32 MQL/MVL
Rev. 1.4