VSC8540RT datasheet(4/87 Pages) MICROCHIP

4 / 87 page

VSC8540RT

DS60001603E-page 4

 2022 Microchip Technology Inc. and its subsidiaries

Contents

Overview ........................................................................................................................................................................ 1

Features ......................................................................................................................................................................... 1

1.0 SPACE QUALITY GRADE .................................................................................................................................... 5

2.0 Block Diagram ....................................................................................................................................................... 6

3.0 Pin Descriptions ..................................................................................................................................................... 7

3.1 Pin Identifications ............................................................................................................................................. 7

3.2 Pin Diagram ..................................................................................................................................................... 7

3.3 Pins by Function .............................................................................................................................................. 8

4.0 Ordering Information ............................................................................................................................................ 14

5.0 Functional Descriptions ....................................................................................................................................... 15

5.1 Operating Modes ........................................................................................................................................... 15

5.2 MAC Interface ................................................................................................................................................ 15

5.3 Hardware Mode Strapping and PHY Addressing ........................................................................................... 18

5.4 Cat5 Twisted Pair Media Interface ................................................................................................................. 21

5.5 Reference Clock ............................................................................................................................................ 23

5.6 Ethernet Inline-Powered Devices .................................................................................................................. 24

5.7 IEEE 802.3af Power-over-Ethernet Support .................................................................................................. 25

5.8 ActiPHY Power Management ........................................................................................................................ 25

5.9 Media Recovered Clock Output ..................................................................................................................... 26

5.10Serial Management Interface ......................................................................................................................... 27

5.11LED Interface ................................................................................................................................................. 29

5.12Wake-On-LAN and SecureOn ....................................................................................................................... 31

5.13Fast Link Failure Indication ............................................................................................................................ 32

5.14Fast Link Failure 2™ (FLF2™) Indication ...................................................................................................... 32

5.15Start of Frame (SOF) Indication ..................................................................................................................... 32

5.16Forced Speed Mode Link-Up Timing ............................................................................................................. 33

5.17Testing Features ............................................................................................................................................ 33

5.18Configuration ................................................................................................................................................. 35

6.0 Registers ............................................................................................................................................................. 36

6.1 Register and Bit Conventions ........................................................................................................................ 36

6.2 IEEE 802.3 and Main Registers ..................................................................................................................... 37

6.3 Extended Page 1 Registers ........................................................................................................................... 48

6.4 Extended Page 2 Registers ........................................................................................................................... 52

6.5 General Purpose Registers ........................................................................................................................... 58

6.6 Clause 45 Registers to Support Energy-Efficient Ethernet and 802.3bf ........................................................60

7.0 Design Considerations ........................................................................................................................................ 63

7.1 Link status LED remains on while COMA_MODE pin is asserted high ......................................................... 63

7.2 10BASE-T signal amplitude ........................................................................................................................... 63

7.3 Receive error counter only clears when NRESET applied in RMII mode ...................................................... 63

7.4 Anomalous PCS error Indications in Energy Efficient Ethernet Mode ...........................................................63

7.5 Half-duplex operation in RGMII MAC interface mode .................................................................................... 63

8.0 Electrical Specifications ....................................................................................................................................... 64

8.1 Absolute Maximum Ratings ........................................................................................................................... 64

8.2 Recommended Operating Conditions ............................................................................................................ 64

8.3 DC Characteristics ......................................................................................................................................... 65

8.4 AC Characteristics ......................................................................................................................................... 69

9.0 Package Information ............................................................................................................................................ 78

9.1 68-Pin Plastic Very Small Quad Flat No-leads .............................................................................................. 78

9.2 68-Pin Ceramic Quad Flat Package .............................................................................................................. 80

Appendix A: Revision History ....................................................................................................................................... 83

The Microchip WebSite ................................................................................................................................................ 84

Customer Change Notification Service ........................................................................................................................ 84

Customer Support ........................................................................................................................................................ 84

Product Identification System ....................................................................................................................................... 85

VSC8540RT 数据表(PDF) 4 Page - Microchip Technology

VSC8540RT 数据表(HTML) 4 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87

数据表下载