ASMedia ASM3142 datasheet

ASMedia ASM3142 is the next generation Universal Series Bus xhci host controller, bridging PCI Express to USB3.1 Gen-II, compliant with USB3.1 Specification Revision 1.0 and Intel eXtensible Host Controller Interface specification revision 1.1. It also supports backward compatible with legacy USB function and devices, compliant with USB Attach SCSI Protocol revision 1.0, supporting the function of debugport on port A of USB.

Table of Contents

Revision History ............................................................................................................................................. iii

Table of Contents ........................................................................................................................................... iv

List of Figures ................................................................................................................................................. v

1. General Description ..................................................................................................................................... 7

2. Features ..................................................................................................................................................... 7

Package Type ........................................................................................................................................... 8

3. Functional Diagram ..................................................................................................................................... 9

4. Pinout Diagrams ....................................................................................................................................... 10

5. Pin Descriptions ........................................................................................................................................ 11

PCI Express Interface ............................................................................................................................. 11

USB Interface ........................................................................................................................................ 11

SPI Interface.......................................................................................................................................... 11

System Interface .................................................................................................................................... 12

Power and Ground ................................................................................................................................. 12

Strapping Table ...................................................................................................................................... 12

6 Electrical Characteristics ............................................................................................................................. 13

6.1 Absolute Maximum Ratings ................................................................................................................... 13

6.2 Recommended Operating Conditions ..................................................................................................... 13

Chip Temperature (TJ, TC) Calculation ...................................................................................................... 13

6.3 AC/DC Characteristics ........................................................................................................................... 14

Digital Pin Specification .......................................................................................................................... 14

PCI Express Electrical Specification .......................................................................................................... 14

USB3.1 Electrical Specification ................................................................................................................ 14

USB2.0 Electrical Specification ................................................................................................................ 14

PCI Express Differential Reference Clock Input Ranges ............................................................................. 14

20MHz Crystal Electrical Specification ...................................................................................................... 15

20MHz Clock input Electrical Specification (from 20MHz crystal) ................................................................ 15

Power Consumption design ..................................................................................................................... 15

7. Timing Diagram ........................................................................................................................................ 16

Power On Sequence Timing Specification for Asynchronous mode ............................................................. 16

Power On Sequence Timing Specification for Strapping ............................................................................ 17

8. PCB Design Guide under Thermal Pad ........................................................................................................ 18

9. Package Information ................................................................................................................................. 19

10. Top Marking Information

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