dm9161a 10/100mbps 快速以太网物理层的单芯片收发器芯片用户手册
使用该芯片的有：
myd-sam9g15 工控板/开发板/核心板
myd-sam9g25 工控板/开发板/核心板
myd-sam9g35 工控板/开发板/核心板
myd-sam9x25 工控板/开发板/核心板
myd-sam9x35 工控板/开发板/核心板
mys-sam9g45 工控板/单板机
mys-sam9g15 工控板/单板机
mys-sam9g25 工控板/单板机
mys-sam9g35 工控板/单板机
mys-sam9x25 工控板/单板机
mys-sam9x35 工控板/单板机
1. general description
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