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LAN91C100 参数 Datasheet PDF下载

LAN91C100图片预览
型号: LAN91C100
PDF下载: 下载PDF文件 查看货源
内容描述: FEAST⑩快速以太网控制器 [FEAST⑩ Fast Ethernet Controller]
分类和应用: 控制器以太网
文件页数/大小: 101 页 / 347 K
品牌: SMSC [ SMSC CORPORATION ]
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LAN91C100
ADVANCE INFORMATION
FEAST™
Fast Ethernet Controller
FEATURES
Dual Speed CSMA/CD Engine (10 Mbps
and 100 Mbps)
Compliant with IEEE 802.3 100BASE-T
Specification
Supports 100BASE-TX, 100BASE-T4, and
10BASE-T Physical Interfaces
32 Bit Wide Data Path (Into Packet Buffer
Memory)
Support for 32 and 16 Bit Buses
Support for 32, 16 and 8 Bit CPU Accesses
Synchronous, Asynchronous and Burst
DMA Interface Mode Options
128 Kbyte External Memory
Built-in Transparent Arbitration for Slave
Sequential Access Architecture
Flat MMU Architecture with Symmetric
Transmit and Receive Structures and
Queues
MII (Media Independent Interface)
Compliant MAC-PHY Interface (Compliant
with Emerging MII Standard Interface)
MII Management Serial Interface
Seven Wire Interface to 10 Mbps ENDEC
(LAN83C694)
EEPROM-Based Setup
208 Pin PQFP and TQFP Package
GENERAL DESCRIPTION
The LAN91C100 FEAST is a high-speed
network controller designed to facilitate the
implementation of Fast Ethernet adapters and
connectivity products. It contains a dual speed
CSMA/CD engine that implements the MAC
portion of the CSMA/CD protocol at 10 and 100
Mbps and couples it with a lean and fast data
and control path system architecture to ensure
data movement with no bottlenecks at 100
Mbps.
Memory management is handled using a unique
MMU (Memory Management Unit) architecture
and a 32-bit wide data path. This I/O mapped
architecture can sustain back-to-back frame
transmission and reception for superior data
throughput and optimal performance. It also
dynamically allocates buffer memory in an
efficient buffer utilization scheme, reducing
software tasks and relieving the host CPU from
performing these housekeeping functions. The
total memory size is 128 Kbytes (external),
equivalent to a total chip storage (transmit and
receive) of 64 outstanding packets.
FEAST provides a flexible slave interface for
easy connectivity with industry-standard buses.
The Bus Interface Unit (BIU) can handle
synchronous as well as asynchronous buses,
with different signals being used for each one.
FEAST's bus interface supports synchronous
buses like the VESA local bus, as well as burst
mode
DMA
for
EISA
environments.
Asynchronous bus support for ISA is supported