KS8999 Micrel Inc, KS8999 Datasheet - Page 25

• Manufacturer Part Number: KS8999
• Description: IC SWITCH 10/100 9PORT 208PQFP
• Manufacturer: Micrel Inc

Specifications of KS8999

• Applications: *
• Mounting Type: Surface Mount
• Package / Case: 208-MQFP, 208-PQFP
• Fiber Support: Yes
• Integrated Led Drivers: Yes
• Phy/transceiver Interface: MII/SNI
• Power Supply Type: Analog/Digital
• Package Type: PQFP
• Data Rate (typ): 10/100Mbps
• Vlan Support: Yes
• Operating Temperature (max): 70C
• Operating Temperature (min): 0C
• Mounting: Surface Mount
• Jtag Support: No
• Operating Temperature Classification: Commercial
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With: 576-1023 - BOARD EVAL EXPERIMENT FOR KS8999
• Lead Free Status / RoHS Status: Not Compliant, Contains lead / RoHS non-compliant

Note that the signal MRXER is not provided on the MII interface for the KS8999 for PHY mode operation and MTXER is not
represented for MAC mode. Normally this would indicate a receive / transmit error coming from the physical layer /MAC device,
but is not appropriate for this configuration. If the connecting device has a MRXER pin, this should be tied low on the other device
for reverse or if it has a MTXER pin in the forward mode it should also be tied low on the other device.
The following explains the KS8999 in PHY mode and MAC mode of operation:
January 2005
KS8999
KS8999 PHY Mode
KS8999 MAC Mode
Figure 3. Data Sent from External MAC Controller to KS8999 PHY Mode
Figure 6. Data Sent from KS8999 PHY Mode to External PHY Device
Figure 4. Data Sent from PHY Mode to External MAC Controller
Figure 5. Data Sent from PHY Device to KS8999 MAC Mode
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KS8999
Micrel