USB2227 datasheet(14/27 Pages) SMSC

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4th Generation USB2.0 Flash Media Controller with Integrated Card Power FETs

Datasheet

Revision 1.91 (10-13-06)

SMSC USB2227/USB2228

DATASHEET

SM_nCE

A42

O8PU

SM Chip Enable:

This pin is the active low chip enable signal to the SM

device.

When using the internal FET, this pin has an internal

weak pull-up resistor that is tied to the output of the

internal Power FET.

If an external FET is used (Internal FET is disabled),

then the internal pull-up is not available (external pull-

ups must be used, and should be connected to the

applicable Card Power Supply).

SM_nCD

B37

IPU

SM Card Detection:

This is the card detection signal from SM device to

indicate if the device is inserted.

This pin has an internally controlled weak pull-up

resistor.

MEMORY STICK INTERFACE

MS_BS

A12

MS Bus State:

This pin is connected to the BS pin of the MS device.

It is used to control the Bus States 0, 1, 2 and 3 (BS0,

BS1, BS2 and BS3) of the MS device.

MS_SDIO/M

S_D0

I/O8PD

MS System Data In/Out:

This pin is a bi-directional data signal for the MS device.

Most significant bit (MSB) of each byte is transmitted

first by either MSC or MS device.

The bi-directional data signal has an internal weak pull-

down resistor.

MS_D1

A10

I/O8PD

MS System Data In/Out:

This pin is a bi-directional data signal for the MS device.

This pin has internally controlled weak pull-up and pull-

down resistors for various operational modes.

MS_D[3:2]

A11

B10

I/O8PD

MS System Data In/Out:

This pin is a bi-directional data signal for the MS device.

The bi-directional data signal has an internal weak pull-

down resistor.

MS_INS

IPU

MS Card Insertion:

This pin is the card detection signal from the MS device

to indicate, if the device is inserted.

This pin has an internally controlled weak pull-up

resistor.

SYMBOL

128-PIN

VTQFP

124-PIN

DQFN

BUFFER

TYPE

DESCRIPTION

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