User ManualTable of ContentsChapter 1 Pin Configuration6Figure 1.1 USB2512Ai 36-Pin QFN (Embedded Footprint)6Chapter 2 Block Diagram7Figure 2.1 USB2512Ai Block Diagram7Chapter 3 Pin Descriptions83.1 Pin Descriptions8Table 3.1 USB2512Ai Pin Descriptions8Table 3.2 SMBus or EEPROM Interface Behavior11Table 3.3 Power, Ground, and No Connect113.2 Buffer Type Descriptions12Table 3.4 Buffer Type Descriptions12Chapter 4 Configuration Options134.1 2-Port Hub134.1.1 Hub Configuration Options134.1.2 VBus Detect134.2 EEPROM Interface134.2.1 Internal Register Set (Common to EEPROM and SMBus)13Table 4.1 Internal Default, EEPROM and SMBus Register Memory Map13Table 4.2 Port Remap Register for Ports 1 & 2234.2.2 I2C EEPROM244.2.3 In-Circuit EEPROM Programming254.3 SMBus Slave Interface254.3.1 Bus Protocols25Figure 4.1 Block Write26Figure 4.2 Block Read264.3.2 Invalid Protocol Response Behavior264.3.3 General Call Address Response264.3.4 Slave Device Time-Out264.3.5 Stretching the SCLK Signal274.3.6 SMBus Timing274.3.7 Bus Reset Sequence274.3.8 SMBus Alert Response Address274.4 Default Configuration Option:274.5 Default Strapping Options:274.6 Reset274.6.1 Internal POR Hardware Reset274.6.2 External Hardware RESET_N28Figure 4.3 Reset_N Timing for Default/Strap Option Mode28Table 4.3 Reset_N Timing for Default/Strap Option Mode28Figure 4.4 Reset_N Timing for EEPROM Mode29Table 4.4 Reset_N Timing for EEPROM Mode29Figure 4.5 Reset_N Timing for SMBus Mode30Table 4.5 Reset_N Timing for SMBus Mode304.6.3 USB Bus Reset30Chapter 5 DC Parameters325.1 Maximum Guaranteed Ratings32Figure 5.1 Supply Rise Time Model325.2 Operating Conditions33Table 5.1 DC Electrical Characteristics33Table 5.2 Pin Capacitance35Chapter 6 AC Specifications366.1 Oscillator/Clock36Figure 6.1 Typical Crystal Circuit36Figure 6.2 Formula to find value of C1 and C2366.1.1 SMBus Interface:366.1.2 I2C EEPROM:366.1.3 USB 2.036Chapter 7 Package Outline37Figure 7.1 36-Pin QFN, 6x6mm Body, 0.5mm Pitch37Size: 670 KBPages: 37Language: EnglishOpen manual
User ManualTable of ContentsChapter 1 Pin Configuration6Figure 1.1 USB2512Ai 36-Pin QFN (Embedded Footprint)6Chapter 2 Block Diagram7Figure 2.1 USB2512Ai Block Diagram7Chapter 3 Pin Descriptions83.1 Pin Descriptions8Table 3.1 USB2512Ai Pin Descriptions8Table 3.2 SMBus or EEPROM Interface Behavior11Table 3.3 Power, Ground, and No Connect113.2 Buffer Type Descriptions12Table 3.4 Buffer Type Descriptions12Chapter 4 Configuration Options134.1 2-Port Hub134.1.1 Hub Configuration Options134.1.2 VBus Detect134.2 EEPROM Interface134.2.1 Internal Register Set (Common to EEPROM and SMBus)13Table 4.1 Internal Default, EEPROM and SMBus Register Memory Map13Table 4.2 Port Remap Register for Ports 1 & 2234.2.2 I2C EEPROM244.2.3 In-Circuit EEPROM Programming254.3 SMBus Slave Interface254.3.1 Bus Protocols25Figure 4.1 Block Write26Figure 4.2 Block Read264.3.2 Invalid Protocol Response Behavior264.3.3 General Call Address Response264.3.4 Slave Device Time-Out264.3.5 Stretching the SCLK Signal274.3.6 SMBus Timing274.3.7 Bus Reset Sequence274.3.8 SMBus Alert Response Address274.4 Default Configuration Option:274.5 Default Strapping Options:274.6 Reset274.6.1 Internal POR Hardware Reset274.6.2 External Hardware RESET_N28Figure 4.3 Reset_N Timing for Default/Strap Option Mode28Table 4.3 Reset_N Timing for Default/Strap Option Mode28Figure 4.4 Reset_N Timing for EEPROM Mode29Table 4.4 Reset_N Timing for EEPROM Mode29Figure 4.5 Reset_N Timing for SMBus Mode30Table 4.5 Reset_N Timing for SMBus Mode304.6.3 USB Bus Reset30Chapter 5 DC Parameters325.1 Maximum Guaranteed Ratings32Figure 5.1 Supply Rise Time Model325.2 Operating Conditions33Table 5.1 DC Electrical Characteristics33Table 5.2 Pin Capacitance35Chapter 6 AC Specifications366.1 Oscillator/Clock36Figure 6.1 Typical Crystal Circuit36Figure 6.2 Formula to find value of C1 and C2366.1.1 SMBus Interface:366.1.2 I2C EEPROM:366.1.3 USB 2.036Chapter 7 Package Outline37Figure 7.1 36-Pin QFN, 6x6mm Body, 0.5mm Pitch37Size: 670 KBPages: 37Language: EnglishOpen manual
