N8X931AA Просмотр технического описания (PDF) - Intel

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N8X931AA

UNIVERSAL SERIAL BUS PERIPHERAL CONTROLLERS

Intel 

CONTENTS

1.0 About This Document.......................................................................................................... 1

1.1 Additional Information Sources ...................................................................................... 1

1.2 Electronic Information..................................................................................................... 1

1.3 Product Summary........................................................................................................... 2

2.0 Nomenclature Overview ...................................................................................................... 4

3.0 Pinout .................................................................................................................................. 6

3.0.1 8x931HA 68-pin PLCC Package ..................................................................................6

3.0.2 8x931AA 68-pin PLCC Package ..................................................................................7

4.0 Signals .............................................................................................................................. 10

5.0 Electrical Characteristics ................................................................................................... 13

5.1 Operating Frequencies ................................................................................................. 14

5.2 DC Characteristics........................................................................................................ 15

5.3 Explanation of Timing Symbols .................................................................................... 17

5.4 System Bus AC Characteristics.................................................................................... 18

5.4.1 System Bus Timing Diagrams ....................................................................................19

5.5 AC Characteristics — Synchronous Mode 0 ................................................................ 21

5.6 External Clock Drive ..................................................................................................... 22

5.7 Testing Waveforms ...................................................................................................... 23

6.0 Thermal Characteristics .................................................................................................... 24

7.0 Design Considerations ...................................................................................................... 24

7.1 Low Clock Mode Frequency......................................................................................... 24

7.2 Setting RXFFRC Bit Clears Only the Oldest Packet in the FIFO ................................. 24

7.3 Series Resistor Requirement for Impedance Matching ................................................ 24

7.4 Pullup Resistor Requirement for 8x931AA/HA devices................................................ 24

7.5 Powerdown Mode Cannot Be Invoked Before USB Suspend ...................................... 24

7.6 Unused Downstream Ports........................................................................................... 24

7.7 ECAP Usage to Supply 3.0 to 3.6 Volts for 1.5K Ohm Pullup ...................................... 24

8.0 8x931AA/HA Errata ........................................................................................................... 25

9.0 Datasheet Revision History ............................................................................................... 25

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