2 buffer type descriptions, Table 3.4 usb2512 buffer type descriptions, Buffer type descriptions – SMSC USB2512 User Manual

Page 12: Datasheet

USB 2.0 High-Speed 2-Port Hub Controller

Datasheet

SMSC USB2512

Revision 1.92 (11-28-07)

DATASHEET

3.2

Buffer Type Descriptions

Table 3.4 USB2512 Buffer Type Descriptions

BUFFER

DESCRIPTION

Input.

IPD

Input with internal weak pull-down resistor.

IPU

Input with internal weak pull-up resistor.

Input with Schmitt trigger.

O12

Output 12mA.

OD12

Open drain... 12mA sink.

I/O12

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

I/OSD12

Open drain...12mA sink with Schmitt trigger, and must meet I2C-Bus Specification
Version 2.1 requirements.

ICLKx

XTAL clock input.

OCLKx

XTAL clock output.

I-R

RBIAS.

I/O-U

Analog Input/Output Defined in USB specification.

AIO

Analog Input/Output.