KS8721BT(2003) 데이터 시트보기 (PDF) - Micrel

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KS8721BT
(Rev.:2003)

2.5V 10/100BasTX/FX MII Physical Layer Transceiver

Micrel 

KS8721B/BT

Micrel

Table Of Contents

Pin Description ............................................................................................................................................................ 6

Strapping Option ......................................................................................................................................................... 9

Pin Configuration ...................................................................................................................................................... 10

Introduction ........................................................................................................................................................... 11

100BaseTX Transmit ........................................................................................................................................... 11

100BaseTX Receive ............................................................................................................................................ 11

PLL Clock Synthesizer ......................................................................................................................................... 11

Scrambler/De-scrambler (100BaseTX only) ........................................................................................................ 11

10BaseT Transmit ............................................................................................................................................... 11

10BaseT Receive ................................................................................................................................................ 11

SQE and Jabber Function (10Base only) ............................................................................................................ 11

Auto-Negotiation .................................................................................................................................................. 11

MII Management Interface ................................................................................................................................... 12

MII Data Interface ................................................................................................................................................ 12

Transmit Clock ............................................................................................................................................. 12

Receive Clock .............................................................................................................................................. 12

Transmit Enable ........................................................................................................................................... 12

Receive Data Valid ...................................................................................................................................... 12

Error Signals ................................................................................................................................................ 12

Carrier Sense ............................................................................................................................................... 12

Collision ....................................................................................................................................................... 13

RMII Signal Definition .......................................................................................................................................... 13

Reference Clock .................................................................................................................................................. 13

Carrier Sense/Receive Data Valid ....................................................................................................................... 13

Receive Data ....................................................................................................................................................... 13

Transmit Enable ................................................................................................................................................... 13

Transmit Data ...................................................................................................................................................... 14

Collision Detection ............................................................................................................................................... 14

RX_ER ........................................................................................................................................................... 14

RMII AC Characteristics ...................................................................................................................................... 14

Auto Crossover (Auto MDI/MDI-X) ...................................................................................................................... 15

Power Management ............................................................................................................................................. 16

100BT FX Mode ................................................................................................................................................... 16

Media Converter Option ....................................................................................................................................... 16

Register Map ........................................................................................................................................................... 17

Register 0h: Basic Conrol ................................................................................................................................... 17

Register 1h: Basic Status .................................................................................................................................... 18

Register 2h: PHY Identifier 1 .............................................................................................................................. 18

Register 3h: PHY Identifier 2 .............................................................................................................................. 18

Register 4h: Auto-Negotiation Advertisement ..................................................................................................... 18

Register 5h: Auto-Negotiation Link Partner Ability .............................................................................................. 18

Register 6h: Auto-Negotiation Expansion ........................................................................................................... 19

Register 7h: Auto-Negotiation Next Page ........................................................................................................... 19

Register 8h: Link Partner Next Page Ability ........................................................................................................ 19

Register 15h: RXER Counter .............................................................................................................................. 20

Register 1bh: Interrupt Control/Status Register .................................................................................................. 20

Register 1fh: 100BaseTX PHY Controller ........................................................................................................... 20

KS8721B/BT

4

August 2003

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