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

Datasheet

Revision 1.3 (05-25-05)

16

SMSC USB2601/USB2602

DATASHEET

CF

IO Read

CF_nIOR

O8

This pin is an active low read strobe signal for CF

device.

CF

IO Write Strobe

CF_nIOW

O8

This pin is an active low write strobe signal for CF

device.

SmartMedia INTERFACE

SM

Write Protect

SM_nWP

O8PD

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

device.

This pin has a weak pull-down resistor that is

permanently enabled

SM

Address Strobe

SM_ALE

O8PD

This pin is an active high Address Latch Enable signal

for the SM device.

This pin has a weak pull-down resistor that is

permanently enabled

SM

Command Strobe

SM_CLE

O8PD

This pin is an active high Command Latch Enable signal

for the SM device.

This pin has a weak pull-down resistor that is

permanently enabled

SM

Data7-0

SM_D[7:0]

I/O8PD

These pins are the bi-directional data signal SM_D7-

SM_D0.

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

down resistor.

SM

Read Enable

SM_nRE

08PU

This pin is an active low read strobe signal for 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.

08

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

Write Enable

SM_nWE

O8PU

This pin is an active low write strobe signal for 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.

08

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

Write Protect Switch

SM_nWPS

IPU

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

This pin has an internally controlled weak pull-up

resistor.

SM

Busy or Data Ready

SM_nB/R

I

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 must be pulled up to the same

power source that powers the SM/NAND flash device.

NAME

SYMBOL

BUFFER

TYPE

DESCRIPTION