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CS8952T-IQ Arkusz danych(PDF) 4 Page - Cirrus Logic |
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CS8952T-IQ Arkusz danych(HTML) 4 Page - Cirrus Logic |
4 / 86 page 4 DS206TPP2 CS8952T CrystalLAN™ 100BASE-X and 10BASE-T Transceiver CIRRUS LOGIC ADVANCED PRODUCT DATABOOK INTRODUCTION The CS8952T is a complete physical-layer trans- ceiver for 100BASE-TX and 10BASE-T applica- tions. It provides a Physical Coding Sub-layer for communication with an external MAC (Media Ac- cess Controller), a complete Physical Medium At- tachment layer, and a 100BASE-TX and 10BASE- T Physical Medium Dependent layer. High Performance Analog The highly integrated mixed-signal design of the CS8952T eliminates the need for external analog circuitry such as transmit or receive filters. The CS8952T builds upon Cirrus Logic’s experience in pioneering the high-volume manufacturing of 10BASE-T integrated circuits with “true” internal filters. The CS8952T, CS8920, CS8904, and CS8900 include fifth-order, continuous-time But- terworth 10BASE-T transmit and receive filters, al- lowing those products to meet 10BASE-T wave shape, emission, and frequency content require- ments without external filters. Low Power Consumption The CS8952T is implemented in low power CMOS, consuming only 135 mA typically. Three low-power modes are provided to make the CS8952T ideal for power sensitive applications. Application Flexibility The CS8952T’s digital interface and operating modes can be tailored to efficiently support a wide variety of applications. For example, the Media In- dependent Interface (MII) supports 100BASE-TX and 10BASE-T NIC cards, switches and routers. Additionally, the low-latency “repeater” interface mode minimizes data delay through the CS8952T, facilitating system compliance with overall net- work delay budgets. To support 10BASE-T appli- cations, the CS8952T provides a 10BASE-T serial port (Seven-wire ENDEC interface). Typical Connection Diagram Figure 1 illustrates a typical MII to CS8952T appli- cation with twisted-pair interfaces. Refer to the De- sign Considerations section for detailed information on power supply requirements and de- coupling, crystal and magnetics requirements, and twisted-pair transceiver connections. |
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