Ultra Fast USB 2.0 Multi-Slot Flash Media Controller

Datasheet

5.2Buffer Type Descriptions

 

Table 5.2 USB2250/50i/51/51i Buffer Type Descriptions

 

 

BUFFER

DESCRIPTION

 

 

I

Input.

 

 

IPU

Input with internal weak pull-up resistor.

 

 

IPD

Input with internal weak pull-down resistor.

 

 

IS

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 when the FET is

 

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 as Defined in USB specification.

 

 

I-R

RBIAS.

 

 

Revision 1.1 (05-29-08)

20

SMSC USB2250/50i/51/51i

DATASHEET