78Q21x3-DB Teridian Semiconductor, 78Q21x3-DB Datasheet
78Q21x3-DB
Manufacturer Part Number
78Q21x3-DB
Description
MII Evaluation Board
Manufacturer
Teridian Semiconductor
Datasheet
1.78Q21X3-DB.pdf
(15 pages)
www.DataSheet4U.com
DESCRIPTION
The 78Q21x3-DB is a design example for a
10/100BASE-TX Mbit/second Fast Ethernet MII
Interface adaptor.
MicroPHY transceiver from Teridian provides the
network
Independent Interface) interface.
Teridian Semiconductor’s MicroPHY is an auto-
sensing,
Ethernet transceiver with full duplex operation
capability.
IEEE-802.3u
management functions are included along with an
extended register set. The MicroPHY five bit PHY
address is defaulted to 0x001.
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.
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:
√
√
√
√
√
© 2007 Teridian Semiconductor Corporation, Proprietary and Confidential
MicroPHY MII Demo Board
Demo Board Parts List
P.C.B. Gerber Files
Demo Board schematic
MicroPHY Data Sheet
physical
auto-switching
The device interfaces directly to the
MII
interface
port.
A 78Q2123 or 78Q2133
10/100BASE-TX
and
Full-featured
The MicroPHY
MII
(Medium
Fast
The
MII
Ordering Number
78Q21x3-DB
- 1 -
10/100Base-TX Interface
RJ45 Pin Assignment
Pin
1
2
3
4
MII:
Pin Assignment:
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Signal
TX+
TX-
RX+
N/C
Medium Independent Interface
(40 Pin Male Subminiature D, 0.050)
Signal
+3.3V
MDIO
MDC
RXD3
RXD2
RXD1
RXD0
RXDV
RXCLK
RXER
TXER
TXCLK
TXEN
TXD0
TXD1
TXD2
TXD3
COL
CRS
+3.3V
78Q21x3-DB MicroPHY
DEMO BOARD MANUAL
MII Evaluation Board
Description
MicroPHY MII Demo Board
Pin
5
6
7
8
Pin
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
Signal
N/C
RX-
N/C
N/C
Signal
+3.3V
COMMON
COMMON
COMMON
COMMON
COMMON
COMMON
COMMON
COMMON
COMMON
COMMON
COMMON
COMMON
COMMON
COMMON
COMMON
COMMON
COMMON
COMMON
+3.3V
April 2007
Rev_2.3
TM
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