am79c972b Advanced Micro Devices, am79c972b Datasheet - Page 3

• Manufacturer Part Number: am79c972b
• Description: Pcnet?-fast+ Enhanced 10/100 Mbps Pci Ethernet Controller With Onnow Support
• Manufacturer: Advanced Micro Devices

P C n e t - I S A I I ™ ( A m 7 9 C 9 6 1 A ) , P C n e t - 3 2 ™
( A m 7 9 C 9 6 5 ) ,
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 exter nal nonvolatile memor y
(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.
P C n e t - P C I ™
( A m 7 9 C 9 7 0 ) ,
Am79C972
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.
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