KS8721BL Просмотр технического описания (PDF) - Micrel

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производитель

KS8721BL

3.3V Single Power Supply 10/100BASE-TX/FX MII Physical Layer Transceiver

Micrel 

Micrel, Inc.

KS8721BL/SL

Contents

Pin Configuration .............................................................................................................................................................. 6

Pin Description .................................................................................................................................................................. 7

Strapping Options(1) ........................................................................................................................................................ 10

Functional Description ................................................................................................................................................... 11

100BASE-TX Transmit.................................................................................................................................................. 11

100BASE-TX Receive................................................................................................................................................... 11

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

Scrambler/De-scrambler (100BASE-TX only) .............................................................................................................. 11

10BASE-T Transmit ...................................................................................................................................................... 11

10BASE-T Receive ....................................................................................................................................................... 11

SQE and Jabber Function (10BASE-T only) ................................................................................................................ 12

Auto-Negotiation ........................................................................................................................................................... 12

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

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

Transmit Clock (TXC)........................................................................................................................................... 12

Receive Clock (RXC) ........................................................................................................................................... 12

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

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

Error Signals......................................................................................................................................................... 13

Carrier Sense (CRS) ............................................................................................................................................ 13

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

RMII (Reduced MII) Data Interface............................................................................................................................... 13

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

Reference Clock (REF_CLK)........................................................................................................................................ 14

Carrier Sense/Receive Data Valid (CRS_DV) .............................................................................................................. 14

Receive Data [1:0] (RXD[1:0]) ...................................................................................................................................... 14

Transmit Enable (TX_EN)............................................................................................................................................. 14

Transmit Data [1:0] (TXD[1:0])...................................................................................................................................... 14

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

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

RMII AC Characteristics................................................................................................................................................ 15

Unused RMII Pins ......................................................................................................................................................... 15

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

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

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

Media Converter Operation........................................................................................................................................... 17

Circuit Design Reference for Power Supply ................................................................................................................. 18

Register Map.................................................................................................................................................................... 19

Register 0h - Basic Control ........................................................................................................................................... 19

Register 1h - Basic Status ............................................................................................................................................ 19

Register 2h - PHY Identifier 1 ....................................................................................................................................... 20

Register 3h - PHY Identifier 2 ....................................................................................................................................... 20

Register 4h - Auto-Negotiation Advertisement ............................................................................................................. 20

Register 5h - Auto-Negotiation Link Partner Ability ...................................................................................................... 21

Register 6h - Auto-Negotiation Expansion.................................................................................................................... 21

Register 7h - Auto-Negotiation Next Page.................................................................................................................... 21

Register 8h - Link Partner Next Page Ability ................................................................................................................ 22

Register 15h - RXER Counter....................................................................................................................................... 22

Register 1bh - Interrupt Control/Status Register .......................................................................................................... 22

Register 1fh - 100BASE-TX PHY Controller................................................................................................................. 23

Absolute Maximum Ratings(1) ........................................................................................................................................ 24

Operating Ratings(2) ........................................................................................................................................................ 24

Electrical Characteristics(4) ............................................................................................................................................ 24

June 2009

4

M9999-062509-1.3

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