USB2224 datasheet(11/20 Pages) SMSC

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Bus Powered USB2.0 Flash Media Controller

Datasheet

SMSC USB2224

Page 11

Revision 1.3 (09-21-04)

DATASHEET

NAME

SYMBOL

BUFFER

TYPE

DESCRIPTION

CF Hardware

Reset

CF_nRESET

This pin is an active low hardware reset signal to CF

device.

CF IO Read

CF_nIOR

This pin is an active low read strobe signal for CF device,

when the CFC is enabled.

CF IO Write

Strobe

CF_nIOW

This pin is an active low write strobe signal for CF device,

when the CFC is enabled.

SmartMedia INTERFACE

SM Write

Protect

SM_nWP

This pin is an active low write protect signal for the SM

device, when the SMC is enabled.

SM Address

Strobe

SM_ALE

This pin is an active high Address Latch Enable signal for

the SM device, when the SMC is enabled.

SM Command

Strobe

SM_CLE

This pin is an active high Command Latch Enable signal

for the SM device, when the SMC is enabled.

SM Data7-0

SM_D[7:0]

I/O8

These pins are the bi-directional data signal SM_D7-

SM_D0, when the SMC is enabled.

SM Read

Enable

SM_nRE

This pin is an active low read strobe signal for SM device,

when SMC is enabled.

SM Write

Enable

SM_nWE

This pin is an active low write strobe signal for SM device,

when SMC is enabled.

SM Write

Protect Switch

SM_nWPS

IPU

A write-protect seal is detected, when this pin is low.

SM Busy or

Data Ready

SM_nB/R

This pin is connected to the BSY/RDY pin of the SM

device.

An external pull-up resistor is required on this signal. The

pull-up resistor should be attached to the power of

SM/NAND flash device.

SM Chip

Enable

SM_nCE

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

device.

SM Card

Detection

SM_nCD

IPU

This is the card detection signal from SM device to

indicate if the device is inserted.

MEMORY STICK INTERFACE

MS Bus State

MS_BS

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 System

Data In/Out

MS_SDIO

/MS_D0

I/O8

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 System

Data In/Out

MS_D1

IO8PD

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

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

down resistor that is internally controlled.

MS System

Data In/Out

MS_D[3:2]

I/O8

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 Card

Insertion

MS_INS

IPU

This pin is the card detection signal from the MS device to

indicate, if the device is inserted.

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