USB2250 datasheet(22/36 Pages) SMSC

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Ultra Fast USB 2.0 Multi-Format Flash Media Controller

Datasheet

Revision 2.6 (05-08-08)

SMSC USB2250/51/59

DATASHEET

5.2

Buffer Type Descriptions

Table 5.2 USB2250/51/59 Buffer Type Descriptions

BUFFER

DESCRIPTION

Input.

IPU

Input with internal weak pull-up resistor.

IPD

Input with internal weak pull-down resistor.

Input with Schmitt trigger.

I/O12

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

I/O200

Input/Output buffer 12mA with FET disabled, 100/200mA source only with FET enabled.

I/O12PD

Input/Output buffer with 12mA sink and 12mA source, with an internal weak pull-down

resistor.

I/O12PU

Input/Output buffer with 12mA sink and 12mA source with a pull-up resistor.

O12

Output buffer with 12mA source.

O12PU

Output buffer with 12mA sink and 12mA source, with a pull-up resistor.

O12PD

Output buffer with 12mA sink and 12mA source, with a pull-down resistor.

ICLKx

XTAL clock input.

OCLKx

XTAL clock output.

I/O-U

Analog Input/Output Defined in USB specification.

I-R

RBIAS.

USB2250 数据表(PDF) 22 Page - SMSC Corporation

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