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CS8920A Datenblatt(PDF) 6 Page - Cirrus Logic |
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CS8920A Datenblatt(HTML) 6 Page - Cirrus Logic |
6 / 144 page • On-chip 10BASE-T filters allow designers to use simple isolation transformers instead of more costly filter/transformer packages. • The serial EEPROM port, used for configu- ration and initialization, eliminates the need for expensive switches and jumpers. • The CS8920A is designed to be used on a 2-layer circuit board instead of a more ex- pensive multi-layer board. • The CS8920A-based solution offers the smallest footprint available, saving valuable printed circuit board area. • A set of certified software drivers is available at no charge, eliminating the need for costly software development. High Performance The CS8920A is a full 16-bit Ethernet controller designed to provide optimal system performance by minimizing time on the ISA bus and CPU overhead per frame. It offers equal or superior performance for less money when compared to other Ethernet controllers. The CS8920A’s Pack- etPage architecture allows software to select whichever access method is best suited to each particular CPU/ISA-bus configuration. When compared to older I/O-space designs, PacketPage is faster, simpler and more efficient. To boost performance further, the CS8920A in- clud e seve ra l key f eatur es th at increase throughput and lower CPU overhead, including: • StreamTransfer cuts up to 87% of interrupts to the host CPU during large block transfers. • Auto-Switch DMA allows the CS8920A to maximize throughput while minimizing missed frames. • Early interrupts allow the host to preprocess incoming frames. • On-chip buffering of full frames cuts the amount of host bandwidth needed to manage Ethernet traffic. Low Power and Low Noise For low power needs, the CS8920A 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 listen for link activity. In either Hardware or Software Suspend mode, the re- CS8920A EEPROM Boot PROM ’245 20 MHz XTAL RJ-45 LED Attachment Unit Interface (AUI) Figure 1.2. Full-Featured ISA Adapter Solution CS8920A 6 DS238PP1 |
Ähnliche Teilenummer - CS8920A |
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Ähnliche Beschreibung - CS8920A |
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