描述 Description

The KSZ9021 is a completely integrated triple speed (10Base-T/100Base-TX/1000Base-T) Ethernet Physical Layer Transceiver for transmission and reception of data over standard CAT-5 unshielded twisted pair (UTP) cable.

The KSZ9021Gxx provides the industry standard Gigabit Media Independent Interface/Media Independent Interface (GMII/MII) for connection to GMII/MII MACs in Gigabit Ethernet Processors and Switches for data transfer at 1000Mbps or 10/100Mbps speed.?The KSZ9021Rxx provides the Reduced Gigabit Media Independent Interface (RGMII).

The KSZ9021 reduces board cost and simplifies board layout by using on-chip termination resistors for the four differential pairs and by integrating a LDO controller to drive a low cost MOSFET to supply the 1.2V core. The KSZ9021 provides diagnostic features to facilitate system bring-up and debugging in production testing and in product deployment. Parametric NAND tree support enables fault detection between KSZ9021 I/Os and board. LinkMD? TDR-based cable diagnostics permit identification of faulty copper cabling. Remote and local loopback functions provide verification of analog and digital data paths.

The KSZ9021RL is available in a 64-pin, lead-free E-LQFP package, and is offered as the KSZ9021RN in the smaller 48-pin QFN package.?The KSZ9021GN is available in a 64-pin, lead-free QFN package and the KSZ9021GQ is available in a 128-pin, lead-free PQFP package.



Microchip's complimentary and confidential MicroCHECK?design review service, which offers insight from the initial concept to the final PCB layout, is available to customers who are using our products in their projects. You can confidently submit your design materials in a secure and private setting, and our expert engineers will provide individualized feedback to enhance your design.?MicroCHECK?design review service is subject to?Microchip's?Program Terms and Conditions?and requires a myMicrochip?account.

特性 Features

? Single-chip 10/100/1000Mbps IEEE 802.3 compliant Ethernet Transceiver
? KSZ9021G features GMII/MII standard compliant interface
? KSZ9021R features RGMII interface compliant to RGMII Version 1.3
? GMII/MII/RGMII I/Os with 3.3V/2.5V tolerant and programmable timings to adjust and correct delays on both Tx and Rx paths
? Auto-negotiation to automatically select the highest link up speed (10/100/100Mbps) and duplex (half/full)
? On-chip termination resistors for the differential pairs
? On-chip LDO controller to support single 3.3V supply operation – requires only external FET to generate 1.2V for the core
? Jumbo frame support up to 16KB
? 125MHz Reference Clock Output
? Programmable LED outputs for link, activity and speed
? Baseline Wander Correction
? LinkMD??TDR-based cable diagnostics for identification of faulty copper cabling
? Parametric NAND Tree support for fault detection between chip I/Os and board.
? Loopback modes for diagnostics

簡介

KSZ9021屬于開發(fā)板套件編程器的評估演示板及套件。由制造生產(chǎn)的KSZ9021評估和演示板及套件該系列產(chǎn)品提供了一種方便的方法，在經(jīng)過驗證的實施環(huán)境中評估某些重點器件的性能或特性。評估方法通常有完善的文檔說明，并且視乎具體情況由評估軟件提供支持。產(chǎn)品通常由印刷電路板組成，板上已裝有重點器件以及必要或有用的支持元器件，另外也可能包括其他組件，例如電纜或電源。對于數(shù)量特別多或類別獨特的器件類別(如 ADC、DAC 和開關(guān)模式電源)，評估平臺可組合為一個單獨的產(chǎn)品系列。