GENERAL DESCRIPTION

The Am79C901A HomePHY is a single-chip device that contains both a physical layer (PHY) for 1 Mbps data networking over existing residential telephone wiring based on the specification published by HomePNA and a physical layer for supporting the IEEE 802.3 standard for 10BASE-T. The HomePHY is targeted at embedded applications and has both GPSI and MII-compatible interfaces.

DISTINCTIVE CHARACTERISTICS

■ Fully integrated 1 Mbps HomePNA Physical Layer (PHY) as defined by Home Phoneline Networking Alliance (HomePNA) specification 1.1

— Optimized for home networking applications over existing telephone wire

— Media Independent Interface (MII)-compatible for connecting external Media Access Controller (MAC)

— In-band control features: Adjustable power and speed levels 32 bits of reserved in-band messaging piggybacked on Ethernet packet

— Register programmable features: Power control Speed control Performance registers Optional control of Squelch algorithm Major frame timing parameters programmable: ISBI, AID ISBI, pulse width, inter-symbol time

— any1Home? link detection: Indicates to the MAC that a valid home networking node has been detected Detects a network failure and allows the upper layer protocol to take corrective action

■ Fully integrated 10 Mbps Ethernet transceiver

— Comprehensive Auto-Negotiation implementation

— IEEE 802.3u-compliant MII

— Full-duplex operation supported on the MII port with independent Transmit (TX) and Receive (RX) channels

— Optimized for 10BASE-T applications

■ Compliant with HomePNA specification 1.1

■ General Purpose Serial Interface (GPSI)/Serial Peripheral Interface (SPI)

■ Extensive programmable internal/external loopback capabilities

■ Extensive LED status support

■ IEEE 1149.1-compliant JTAG Boundary Scan test access port interface

■ Very low power consumption

■ +3.3 V power supply along with 5 V tolerant I/Os enable broad system compatibility

— XTAL1 supports 3.3 V I/O only

— XTAL2 supports 1.0 V I/O only

■ Available in 68-pin PLCC and 80-pin TQFP packages

■ Industrial Temperature Support (-40oC to +85oC)