Document Outline

• Chapter 1 Overview
  • 1.1 Device Features
  • 1.2 OEM Selectable Features
• Chapter 2 Acronyms
• Chapter 3 Pin Configurations
  • Figure 3.1 USB2640 48-Pin QFN
  • Figure 3.2 USB2641 48-Pin QFN
• Chapter 4 Pin Tables
  • 4.1 48-Pin Tables
    • Table 4.1 USB2640 48-Pin Table
    • Table 4.2 USB2641 48-Pin Table
• Chapter 5 Block Diagrams
  • Figure 5.1 USB2640 Block Diagram
  • Figure 5.2 USB2641 Block Diagram
• Chapter 6 Pin Descriptions
  • 6.1 USB2640/USB2641 Pin Descriptions
    • Table 6.1 USB2640/USB2641 Pin Descriptions
  • 6.2 Buffer Type Descriptions
    • Table 6.2 USB2640/USB2641 Buffer Type Descriptions
  • 6.3 Port Power Control
    • Figure 6.1 Port Power Control with USB Power Switch
    • Figure 6.2 Port Power Control with Single Poly Fuse and Multiple Loads
    • Figure 6.3 Port Power with Ganged Control with Poly Fuse
  • 6.4 ROM BOOT Sequence
    • Figure 6.4 USB2640/USB2641 SPI ROM Connection
    • Figure 6.5 USB2640/USB2641 I2C Connection
• Chapter 7 Configuration Options
  • 7.1 Hub
    • 7.1.1 Hub Configuration Options
    • 7.1.2 VBus Detect
  • 7.2 Card Reader
  • 7.3 System Configurations
    • 7.3.1 EEPROM/SPI Interface
    • 7.3.2 EEPROM Data Descriptor
      • Table 7.1 Internal Flash Media Controller Configurations
      • Table 7.2 Hub Controller Configurations
      • Table 7.3 Other Internal Configurations
      • Table 7.4 FET Configuration
    • 7.3.3 LUN ID Strings
      • Table 7.5 Port Remap Register for Ports 1 & 2
      • Table 7.6 Port Remap Register for Port 3
    • 7.3.4 I2C EEPROM
    • 7.3.5 In-Circuit EEPROM Programming
  • 7.4 Default Configuration Option:
  • 7.5 Reset
    • 7.5.1 Internal POR Hardware Reset
    • 7.5.2 External Hardware RESET_N
      • Figure 7.1 Reset_N Timing for EEPROM Mode
      • Table 7.7 Reset_N Timing for EEPROM Mode
    • 7.5.3 USB Bus Reset
• Chapter 8 Pin Reset States
  • Figure 8.1 Pin Reset States
  • Table 8.1 Legend for Pin Reset States Table
  • 8.1 Pin Reset States
    • Table 8.2 USB2640 Pin Reset States
    • Table 8.3 USB2641 Pin Reset States
• Chapter 9 DC Parameters
  • 9.1 Maximum Guaranteed Ratings
    • Figure 9.1 Supply Rise Time Models
  • 9.2 Operating Conditions
  • 9.3 DC Electrical Characteristics
  • 9.4 Capacitance
    • Table 9.1 Pin Capacitance
• Chapter 10 AC Specifications
  • 10.1 Oscillator/Clock
    • Figure 10.1 Typical Crystal Circuit
    • Figure 10.2 Formula to find value of C1 and C21
• Chapter 11 Package Outline
  • Figure 11.1 USB2640/USB2641 48-Pin QFN
• Chapter 12 GPIO Usage
  • Table 12.1 USB2640/USB2641 GPIO Usage