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Teridian Semiconductor |
78Q21x3-DB MicroPHYTM
MII Evaluation Board
DEMO BOARD MANUAL
April 2007
DESCRIPTION
The 78Q21x3-DB is a design example for a
10/100BASE-TX Mbit/second Fast Ethernet MII
Interface adaptor. A 78Q2123 or 78Q2133
MicroPHY transceiver from Teridian provides the
network physical interface and MII (Medium
Independent Interface) interface.
Teridian Semiconductor’s MicroPHY is an auto-
sensing, auto-switching 10/100BASE-TX Fast
Ethernet transceiver with full duplex operation
capability. The device interfaces directly to the
IEEE-802.3u MII port.
Full-featured MII
management functions are included along with an
extended register set. The MicroPHY five bit PHY
address is defaulted to 0x001. The MicroPHY
interfaces to CAT5 UTP cable via a 1:1 transformer.
The transceiver’s transmitter includes on-chip the
pulse shaper and low power line driver. The
receiver incorporates a sophisticated combination of
real-time adaptive equalization, an adaptive DC
offset adjustment circuit and baseline wander
correction. Smart squelch circuitry further improves
the receiver’s noise rejection. Full featured auto-
negotiation or parallel detect modes are supported.
The demo board requires operation with a +3.3V
power supply.
Design Kit contains:
√ MicroPHY MII Demo Board
www.D√ataSheeDt4eUm.coomBoard Parts List
√ P.C.B. Gerber Files
√ Demo Board schematic
√ MicroPHY Data Sheet
10/100Base-TX Interface
RJ45 Pin Assignment
Pin Signal
Pin Signal
1 TX+
5 N/C
2 TX-
6 RX-
3 RX+
7 N/C
4 N/C
8 N/C
MII: Medium Independent Interface
Pin Assignment:
(40 Pin Male Subminiature D, 0.050)
Pin Signal
Pin Signal
1 +3.3V
21 +3.3V
2 MDIO
22 COMMON
3 MDC
23 COMMON
4 RXD3
24 COMMON
5 RXD2
25 COMMON
6 RXD1
26 COMMON
7 RXD0
27 COMMON
8 RXDV
28 COMMON
9 RXCLK
29 COMMON
10 RXER
30 COMMON
11 TXER
31 COMMON
12 TXCLK
32 COMMON
13 TXEN
33 COMMON
14 TXD0
34 COMMON
15 TXD1
35 COMMON
16 TXD2
36 COMMON
17 TXD3
37 COMMON
18 COL
38 COMMON
19 CRS
39 COMMON
20 +3.3V
40 +3.3V
Ordering Number
78Q21x3-DB
Description
MicroPHY MII Demo Board
© 2007 Teridian Semiconductor Corporation, Proprietary and Confidential
-1-
Rev_2.3
MII ADAPTOR WITH MICROPHY
78Q21x3-DB MicroPHYTM
MII Evaluation Board
DEMO BOARD MANUAL
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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
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