DM9801E Product Brief
1M Home Phoneline Network Physical Layer Single Chip Transceiver
June 2008 Rev.1.0
The DM9801 is a physical-layer, single-chip, low-power transceiver for 1M Home
Phoneline Network applications. On the media side, it provides an interface to a
Home Phoneline wiring system. The reconciliation layer interfaces to the DM9801
either through an IEEE802.3u subset Media Independent Interface (MII) or a
pseudo-standard General Purpose Serial Interface (GPSI). A management interface is
provided by MDIO/MDC when operating in MII mode, or a Serial Peripheral
Interface bus when operating in GPSI mode.
The DM9801 uses a low-power and high-performance CMOS process. It contains the
entire physical layer functions of 1M as defined by Home Phoneline Network
Alliance, Rev. 1.1, including the Physical Coding
Sublayer, (RLL25) Encoder/Decoder (ENC/DEC), 4-wire HN Driver circuit and
receiver analog front end (AFE).
Patent-Pending Circuitry Includes:
An enhanced 4-wire Home Network transceiver circuit.
Block Diagram
Transmit
Timing
Generator
HN
Secondary
Driver
HNB+/-
RLL25
Encoder
HN
Primary
Driver
HNA+/-
GPSI - MII
Transmit
Muxed
GPSI
or Mii
Interface
Master
PHY
Controller
GPSI - MII
Receive
Interface
Select
RLL25
Decoder
Receiever
and
Digital PLL
Receiver
AFE
DAVICOM [ DAVICOM SEMICONDUCTOR, INC. ]
