78Q21x3-DB Teridian Semiconductor, 78Q21x3-DB Datasheet - Page 2

• Manufacturer Part Number: 78Q21x3-DB
• Description: MII Evaluation Board
• Manufacturer: Teridian Semiconductor

TM
78Q21x3-DB MicroPHY
MII Evaluation Board
DEMO BOARD MANUAL
fd
MII ADAPTOR WITH MICROPHY
Use With the Netcom Smart-Bits
The Netcom expects to be the master and defaults to 100BASE-TX Half-Duplex operation. Fast-Ether Windows
may require the reconfiguration of the MicroPHY’s control register MR0 bits for similar operation. The MicroPHY
defaults to auto-negotiate with full capabilities.
After initialization the MicroPHY defaults to 100BASE-TX Full-Duplex operation. When connected to another fully
capable transceiver the transceivers will be in full-duplex mode. The default configuration of the Netcom is
100BASE-TX Half-Duplex operation. If data transfers were to commence, the Netcom would display Collision
errors (because it does not automatically read the transceivers and reconfigure).
The default MII PHY address for the MicroPHY is 0x001.
Additionally, the MicroPHY will respond to the
broadcast address 0x000.
If a transceiver is used which defaults to 100BASE-TX Half-Duplex operation, the MicroPHY will adjust itself for
half-duplex operation (assuming the MicroPHY is setup for the proper technologies).
To establish proper operation between the MicroPHY and the Netcom, click on the “Options” button followed by
selecting “Full Duplex MII”. Repeat selecting “Full Duplex MII” twice to ensure that everything is configured
identically.
The MicroPHY can be configured for half-duplex operation to minimize incompatibilities with other transceivers
and the Netcom.
www.DataSheet4U.com
© 2007 Teridian Semiconductor Corporation, Proprietary and Confidential
- 2 -
Rev_2.3