
142
Agere Systems Inc.
T8302 Internet Protocol Telephone
Advanced RISC Machine (
ARM
)
Data Sheet
July 2001
12 Ethernet 10/100 PHY(s)
Please refer to
Agere’s
DNC3X3225 Ethernet Transceiver Macrocell
Data Sheet for references.
A twisted pair 10/100 Ethernet transceiver macrocell supports transmission and reception over category three
unshielded twisted pair (UTP) cable and category 5 UTP. It has been designed specifically for applications that sup-
port both 10Base-T and 100Base-X, such as network interface cards (NICs), and switches.
The features of the 10/100 Ethernet transceiver macrocell are listed below.
12.1 10 Mbits Transceiver Features
I
DSP based.
I
Compatible with
IEEE
802.3u 1995 10Base-T standard for twisted pair cable.
I
Half-duplex and full-duplex operations.
I
Autopolarity detection and correction.
I
Adjustable squelch level for extended wire-length capability (2 levels).
I
Interfaces with
IEEE
802.3u media independent interface (MII) or a serial 10 Mbits/s 7-pin interface.
I
On-chip filtering eliminates the need for external filters.
12.2 100 Mbits/s Transceiver Features
I
Compatible with
IEEE
802.3u 1995 MII (clause 22). PCS/PMA (clause 24), PMD (clause 25), Mll management,
and autonegotiation (clause 28) specifications.
I
Selectable 5-bit code-group (PDT/PDR interface) or 4-bit data nibbles (Mll interface) input/output.
I
Full or half-duplex operations.
I
Optional carrier integrity monitor (CIM).
I
Selectable carrier sense signal generation (MCRS) asserted during either transmission or reception in
half-duplex (MCRS asserted during reception only in full-duplex).
I
Adaptive equalization and baseline wander correction.
I
On-chip filtering eliminates the need for external filters.
I
100 Mbits/s FX transceiver.
I
Compatible with
IEEE
802.3u 100Base-FX standard.
I
Disables autonegotiation and 10Base-T.
I
Enables 100Base-FX remote fault signaling.
I
Disables MLT-3 encoder/decoder.
I
Disables scrambler/descrambler.
I
FX mode enable is pin or register selectable.