DM9801
1M Home Phoneline Network Physical Layer Single Chip Transceiver
Preliminary
1
Version: DM9801-DS-P02
March 20, 2000
General Description
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
HN
Secondary
Driver
Muxed
GPSI
or Mii
Interface
RLL25
Encoder
RLL25
Decoder
Master
PHY
Controller
Receiever
and
Digital PLL
Transmit
Timing
Generator
HN
Primary
Driver
Receiver
AFE
GPSI - MII
Transmit
GPSI - MII
Receive
HNA+/-
HNB+/-
Interface
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