2 buffer type descriptions, Buffer type descriptions – SMSC USB2250i User Manual
Page 20
Ultra Fast USB 2.0 Multi-Slot Flash Media Controller
Datasheet
Revision 1.1 (05-29-08)
20
SMSC USB2250/50i/51/51i
DATASHEET
5.2
Buffer 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.