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CS8900A-IQ 参数 Datasheet PDF下载

CS8900A-IQ图片预览
型号: CS8900A-IQ
PDF下载: 下载PDF文件 查看货源
内容描述: 水晶局域网? ISA以太网控制器 [Crystal LAN ⑩ ISA Ethernet Controller]
分类和应用: 控制器局域网以太网
文件页数/大小: 128 页 / 1360 K
品牌: CIRRUS [ CIRRUS LOGIC ]
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CS8900A  
Crystal LAN™ ISA Ethernet Controller  
1.3 Key Features and Benefits  
older I/O-space designs, PacketPage is faster, sim-  
pler and more efficient.  
1.3.1 Very Low Cost  
To boost performance further, the CS8900A in-  
cludes several key features that increase throughput  
and lower CPU overhead, including:  
The CS8900A is designed to provide the lowest-  
cost Ethernet solution available for embedded ap-  
plications, portable motherboards, non-ISA bus  
systems and adapter cards. Cost-saving features in-  
clude:  
StreamTransfer cuts up to 87% of interrupts to  
the host CPU during large block transfers.  
Integrated RAM eliminates the need for expen-  
sive external memory chips.  
Auto-Switch DMA allows the CS8900A to  
maximize throughput while minimizing missed  
frames.  
On-chip 10BASE-T filters allow designers to  
use simple isolation transformers instead of  
more costly filter/transformer packages.  
Early interrupts allow the host to preprocess in-  
coming frames.  
The serial EEPROM port, used for configura-  
tion and initialization, eliminates the need for  
expensive switches and jumpers.  
On-chip buffering of full frames cuts the  
amount of host bandwidth needed to manage  
Ethernet traffic.  
The CS8900A is designed to be used on a 2-  
layer circuit board instead of a more expensive  
multilayer board.  
1.3.3 Low Power and Low Noise  
For low power needs, the CS8900A offers three  
power-down options: Hardware Standby, Hard-  
ware Suspend, and Software Suspend. In Standby  
mode, the chip is powered down with the exception  
of the 10BASE-T receiver, which is enabled to lis-  
ten for link activity. In either Hardware or Software  
Suspend mode, the receiver is disabled and power  
consumption drops to the micro-ampere range.  
The 8900A-based solution offers the smallest  
footprint available, saving valuable printed cir-  
cuit board area.  
A set of certified software drivers is available at  
no charge, eliminating the need for costly soft-  
ware development.  
In addition, the CS8900A has been designed for  
very low noise emission, thus shortening the time  
required for EMI testing and qualification.  
1.3.2 High Performance  
The CS8900A is a full 16-bit Ethernet controller  
designed to provide optimal system performance  
by minimizing time on the ISA bus and CPU over-  
head per frame. It offers equal or superior perfor-  
mance for less money when compared to other  
Ethernet controllers. The CS8900A’s PacketPage  
architecture allows software to select whichever  
access method is best suited to each particular  
CPU/ISA-bus configuration. When compared to  
1.3.4 Complete Support  
The CS8900A comes with a suite of software driv-  
ers for immediate use with most industry standard  
network operating systems. In addition, complete  
evaluation kits and manufacturing packages are  
available, significantly reducing the cost and time  
required to produce new Ethernet products.  
CIRRUS LOGIC PRODUCT DATA SHEET  
10  
DS271PP3  
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