am79c961 Advanced Micro Devices, am79c961 Datasheet - Page 2

• Manufacturer Part Number: am79c961
• Description: Pcnettm-isa Jumperless Single-chip Ethernet Controller For Isa
• Manufacturer: Advanced Micro Devices

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the integrated DMA controller. This configuration en-
hances
PCnet-ISA
troller and directly address the full 24-bit memory space.
The implementation of Bus Master Mode allows mini-
mum parts count for the majority of PC applications. The
PCnet-ISA
Shared Memory operations for compatibility with low-
end machines, such as PC/XTs that do not support Bus
Master and high-end machines that require local packet
buffering for increased system latency.
The PCnet-ISA
face with the ISA or EISA system bus. It contains an ISA
Plug and Play bus interface unit, DMA Buffer Manage-
ment Unit, 802.3 Media Access Control function,
individual 136-byte transmit and 128-byte receive
FIFOs, IEEE 802.3 defined Attachment Unit Interface
(AUI), and a Twisted Pair Transceiver Media Attach-
ment Unit. The PCnet-ISA
compatible with the LANCE (Am7990) Ethernet control-
ler and PCnet-ISA. The DMA Buffer Management Unit
supports the LANCE descriptor software model.
RELATED PRODUCTS
Part No.
Am79C98
Am79C100
Am7996
Am79C981
Am79C987
Am79C940
Am79C90
Am79C960
Am79C965
Am79C970
AMD
system
+
+
controller to bypass the platform DMA con-
controller can be configured to perform
+
controller is designed to directly inter-
Description
Twisted Pair Ethernet Transceiver (TPEX)
Twisted Pair Ethernet Transceiver Plus (TPEX
IEEE 802.3/Ethernet/Cheapernet Transceiver
Integrated Multiport Repeater Plus
Hardware Implemented Management Information Base
Media Access Controller for Ethernet (MACE )
CMOS Local Area Network Controller for Ethernet (C-LANCE)
PCnet-ISA Single-Chip Ethernet Controller (for ISA bus)
PCnet-32 Single-Chip 32-Bit Ethernet Controller (for 386, 486, VL local buses)
PCnet-PCI Single-Chip Ethernet Controller (for PCI bus)
performance
+
controller is also register
by
allowing
P R E L I M I N A R Y
(IMR+ )
Am79C961
the
+
)
External remote boot and Ethernet physical address
PROMs and Electrically Erasable Proms are also
supported.
This advanced Ethernet controller has the built-in capa-
bility of automatically selecting either the AUI port or the
Twisted Pair transceiver. Only one interface is active at
any one time. The individual 136-byte transmit and
128-byte receive FIFOs optimize system overhead, pro-
viding sufficient latency during packet transmission and
reception, and minimizing intervention during normal
network error recovery. The integrated Manchester en-
coder/decoder eliminates the need for an external Serial
Interface Adapter (SIA) in the node system. If support
for an external encoding/decoding scheme is desired,
the embedded General Purpose Serial Interface (GPSI)
allows direct access to/from the MAC. In addition, the
device provides programmable on-chip LED drivers for
transmit, receive, collision, receive polarity, link integrity
and activity, or jabber status. The PCnet-ISA
also provides an External Address Detection Interface
(EADI ) to allow external hardware address filtering in
internetworking applications.
(HIMIB )
+
controller