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AM79C972BKC

PCnetTM-FAST+ enhanced 10/100 Mbps PCI Ethernet controller with OnNow support

Advanced Micro Devices 

PCnet-ISA II™ (Am79C961A), PCnet-32™

(Am79C965), PCnet-PCI™ (Am79C970),

PCnet-PCI II™ (Am79C970A), and the PCnet-FAST™

(Am79C971). The Buffer Management Unit supports

the LANCE and PCnet descriptor software models.

The Am79C972 PCnet-FAST+ controller supports

auto-configuration in the PCI configuration space.

Additional Am79C972 controller configuration parame-

ters, including the unique IEEE physical address, can

be read from an external nonvolatile memory

(EEPROM) immediately following system reset.

In addition, the device provides programmable on-chip

LED drivers for transmit, receive, collision, link integrity,

Magic Packet status, activity, address match, full-du-

plex, or 100 Mbps status. The Am79C972 controller

also provides an EADI to allow external hardware ad-

dress filtering in internetworking applications and a re-

ceive frame tagging feature.

The Am79C972 PCnet-FAST+ controller contains

12-kilobyte (Kbyte) buffers, the largest of its class of 10/

100 Mbps Ethernet controllers. The large internal

buffer is programmable between the transmit (TX) and

receive (RX) queues for optimal performance.

With the rise of embedded networking applications op-

erating in harsh environments where temperatures

may exceed the normal commercial temperature win-

dow (0°C to 70°C), an industrial temperature (-40°C to

+85°C) version is available in both the 160-pin PQFP

and the 176-pin TQFP package. The Am79C972

PCnet-FAST+ 10/100 Mbps Ethernet controller can be

designed with the industrial temperature capable

Am79C874 NetPHY-1LP 10/100 Mbps Ethernet PHY

for a complete and robust Fast Ethernet solution that

can withstand extreme temperature environments.

Am79C972

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