USB4640 datasheet(21/64 Pages) SMSC

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High Speed Inter-Chip (HSIC) USB 2.0 Hub and Flash Media Controller

Datasheet

SMSC USB4640/USB4640i

Revision 1.0 (06-09-09)

DATASHEET

6.2

Buffer Type Descriptions

Table 6.2 USB4640/USB4640i Buffer Type Descriptions

BUFFER

DESCRIPTION

Input.

I/O

Input/output.

IPU

Input with weak internal pull-up.

Input with Schmitt trigger.

I/O6

Input/output buffer with 6 mA sink and 6 mA source.

I/OD6PU

Input/open drain output buffer with a 6 mA sink.

Output buffer with an 8 mA sink and an 8 mA source.

O8PD

Output buffer with an 8 mA sink and an 8 mA source with a weak internal pull-down resistor.

O8PU

Output buffer with an 8 mA sink and an 8 mA source with a weak internal pull-up resistor.

I/O8

Input/output buffer with an 8 mA sink and an 8 mA source.

I/O8PD

Input/output buffer with an 8 mA sink and an 8 mA source with a weak internal pull-down resistor.

I/O8PU

Input/output buffer with an 8 mA sink and an 8 mA source with a weak internal pull-up resistor.

O12

Output buffer with a 12 mA sink and a 12 mA source.

I/O12

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

I/O12PD

Input/output buffer with 12 mA sink and 12 mA source with a weak internal pull-down resistor.

I/O200

Input/output buffer 12 mA with FET disabled, 100/200 mA source only when the FET is enabled.

ICLKx

XTAL clock input.

OCLKx

XTAL clock output.

I/O-U

Analog input/output as defined in the USB 2.0 Specification.

I-R

RBIAS.

USB4640 数据表(PDF) 21 Page - SMSC Corporation

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