Datasheet

USB 2.0 Hi-Speed 7-Port Hub Controller

Datasheet

Revision 2.8 (09-17-12) 16 SMSC USB2517

DATASHEET

5.2 Buffer Type Descriptions

1 0 1 Internal Default Configuration

 Strap Options are Disabled

 Dynamic Power Switching is Enabled

 LED Mode = USB

1 1 0 Internal Default Configuration

 Strap Options are Disabled

1 1 1 Internal Default Configuration

 Strap Options are Disabled

 LED Mode = USB

 Ganged Power Switching

 Ganged Over-Current Sensing

Table 5.3 USB2517 Buffer Type Descriptions

BUFFER DESCRIPTION

I Input.

IPD Input with internal weak pull-down resistor.

IPU Input with internal weak pull-up resistor.

IS Input with Schmitt trigger.

O12 Output 12mA.

I/O12 Input/Output buffer with 12mA sink and 12mA source.

I/OSD12 Open drain...12mA sink with Schmitt trigger, and must meet

C-Bus Specification

Version 2.1 requirements.

ICLKx XTAL clock input.

OCLKx XTAL clock output.

I-R RBIAS.

IO-U Analog Input/Output Defined in USB specification.

CFG_SEL2 CFG_SEL1 CFG_SEL0 SMBUS OR EEPROM INTERFACE BEHAVIOR