ic芯片 /集成电路芯片dm9161aep

the dm9161a is a physical layer, single-chip, and low power transceiver for 100base-tx and 10base-t
operations. on the media side, it provides a direct interface either to unshielded twisted pair category 5 cable
(utp5) for 100base-tx fast ethernet, or utp5/utp3 cable for 10base-t ethernet. through the media
independent interface (mii), the dm9161a connects to the medium access control (mac) layer, ensuring a high
inter operability from different vendors.
thedm9161a uses a low power and high performance advanced cmos process. it contains the entire physical
layer functions of 100base-tx as defined by ieee802.3u, including the physical coding sublayer (pcs),
physical medium attachment (pma), twisted pair physical medium dependent sublayer (tp-pmd), 10base-tx
encoder/decoder (enc/dec), and twisted pair media access unit (tpmau). the dm9161a provides a strong
support for the auto-negotiation function, utilizing automatic media speed and protocol selection. furthermore, due
to the built-in wave shaping filter, the dm9161a needs no external filter to transport signals to the media in
100base-tx or 10base-t ethernet operation.
2. features
fully comply with ieee 802.3 / ieee 802.3u 10base-t/
100base-tx, ansi x3t12 tp-pmd 1995 standard
support mdi/mdi-x auto crossover function
(auto-mdi)
support auto-negotiation function, compliant with ieee
802.3u
fully integrated physical layer transceiver on-chip
filtering with direct interface to magnetic transformer
selectable repeater or node mode
selectable mii or rmii (reduced mii) mode for
100base-tx and 10base-tx. selectable mii or gpsi
(7-wired) mode for 10base-t
selectable full-duplex or half-duplex operation
mii management interface with maskable interrupt
output capability
provide loopback mode for easy system
diagnostics
led status outputs indicate link/ activity, speed10/100
and full-duplex/collision. support dual-led optional
control
single low power supply of 3.3v with an advanced
cmos technology
very low power consumption modes:
● power reduced mode (cable detec