User ManualTable of ContentsChapter 1 General Description61.1 OEM Selectable Features6Chapter 2 Pin Table 2-Port7Table 2.1 2-Port Pin Table for 36-QFN7Table 2.2 2-Port Pin Table for 48-TQFP8Chapter 3 Pin Configuration 2-Port Hub9Figure 3.1 2-Port 36-Pin QFN9Figure 3.2 2-Port 48-Pin TQFP10Chapter 4 2-Port Hub Block Diagram11Figure 4.1 2-Port Block Diagram11Table 4.1 2-Port Hub Pin Descriptions11Table 4.2 SMBus or EEPROM Interface Behavior13Table 4.3 Miscellaneous Pins13Table 4.4 Power, Ground, and No Connect14Table 4.5 Buffer Type Descriptions14Chapter 5 Functional Block Description165.1 2-Port Hub165.1.1 Hub Configuration Options165.1.2 VBus Detect185.2 EEPROM Interface195.2.1 I2C EEPROM195.2.2 In-Circuit EEPROM Programming195.2.3 EEPROM DATA19Table 5.1 User-Defined Descriptor Data195.3 SMBus Slave Interface245.3.1 Bus Protocols24Table 5.2 SMBus Write Byte Protocol25Table 5.3 SMBus Read Byte Protocol255.3.2 Invalid Protocol Response Behavior255.3.3 General Call Address Response255.3.4 Slave Device Time-Out265.3.5 Stretching the SCLK Signal265.3.6 SMBus Timing265.3.7 Bus Reset Sequence265.3.8 SMBus Alert Response Address265.3.9 Internal SMBus Memory Register Set26Table 5.4 SMBus Slave Interface Register Map265.4 Default Configuration Option:325.5 Default Strapping Options:32Figure 5.1 LED Strapping Option325.6 Reset325.6.1 External Hardware RESET_N33Figure 5.2 Reset_N Timing for Default/Strap Option Mode33Table 5.5 Reset_N Timing for Default/Strap Option Mode33Figure 5.3 Reset_N Timing for EEPROM Mode34Table 5.6 Reset_N Timing for EEPROM Mode34Figure 5.4 Reset_N Timing for SMBus Mode35Table 5.7 Reset_N Timing for SMBus Mode355.6.2 USB Bus Reset36Chapter 6 XNOR Test37Chapter 7 DC Parameters387.1 Maximum Guaranteed Ratings387.2 Recommended Operating Conditions39Table 7.1 DC Electrical Characteristics39Chapter 8 AC Specifications428.1 Oscillator/Clock428.1.1 SMBus Interface:428.1.2 I2C EEPROM:428.1.3 USB 2.042Chapter 9 Package Outlines43Figure 9.1 36 Pin QFN Package43Figure 9.2 48 Pin TQFP Package Outline (7x7x1.4 mm body, 2mm Footprint)44Table 9.1 48 Pin TQFP Package44Size: 742 KBPages: 44Language: EnglishOpen manual
User ManualTable of ContentsChapter 1 General Description61.1 OEM Selectable Features6Chapter 2 Pin Table 2-Port7Table 2.1 2-Port Pin Table for 36-QFN7Table 2.2 2-Port Pin Table for 48-TQFP8Chapter 3 Pin Configuration 2-Port Hub9Figure 3.1 2-Port 36-Pin QFN9Figure 3.2 2-Port 48-Pin TQFP10Chapter 4 2-Port Hub Block Diagram11Figure 4.1 2-Port Block Diagram11Table 4.1 2-Port Hub Pin Descriptions11Table 4.2 SMBus or EEPROM Interface Behavior13Table 4.3 Miscellaneous Pins13Table 4.4 Power, Ground, and No Connect14Table 4.5 Buffer Type Descriptions14Chapter 5 Functional Block Description165.1 2-Port Hub165.1.1 Hub Configuration Options165.1.2 VBus Detect185.2 EEPROM Interface195.2.1 I2C EEPROM195.2.2 In-Circuit EEPROM Programming195.2.3 EEPROM DATA19Table 5.1 User-Defined Descriptor Data195.3 SMBus Slave Interface245.3.1 Bus Protocols24Table 5.2 SMBus Write Byte Protocol25Table 5.3 SMBus Read Byte Protocol255.3.2 Invalid Protocol Response Behavior255.3.3 General Call Address Response255.3.4 Slave Device Time-Out265.3.5 Stretching the SCLK Signal265.3.6 SMBus Timing265.3.7 Bus Reset Sequence265.3.8 SMBus Alert Response Address265.3.9 Internal SMBus Memory Register Set26Table 5.4 SMBus Slave Interface Register Map265.4 Default Configuration Option:325.5 Default Strapping Options:32Figure 5.1 LED Strapping Option325.6 Reset325.6.1 External Hardware RESET_N33Figure 5.2 Reset_N Timing for Default/Strap Option Mode33Table 5.5 Reset_N Timing for Default/Strap Option Mode33Figure 5.3 Reset_N Timing for EEPROM Mode34Table 5.6 Reset_N Timing for EEPROM Mode34Figure 5.4 Reset_N Timing for SMBus Mode35Table 5.7 Reset_N Timing for SMBus Mode355.6.2 USB Bus Reset36Chapter 6 XNOR Test37Chapter 7 DC Parameters387.1 Maximum Guaranteed Ratings387.2 Recommended Operating Conditions39Table 7.1 DC Electrical Characteristics39Chapter 8 AC Specifications428.1 Oscillator/Clock428.1.1 SMBus Interface:428.1.2 I2C EEPROM:428.1.3 USB 2.042Chapter 9 Package Outlines43Figure 9.1 36 Pin QFN Package43Figure 9.2 48 Pin TQFP Package Outline (7x7x1.4 mm body, 2mm Footprint)44Table 9.1 48 Pin TQFP Package44Size: 742 KBPages: 44Language: EnglishOpen manual
