4th Generation USB 2.0 Flash Media Controller with Integrated Card Power FETs & HS Hub

Datasheet

 

 

BUFFER

 

NAME

SYMBOL

TYPE

DESCRIPTION

 

 

 

 

CF

CF_nIOR

O8

This pin is an active low read strobe signal for CF

IO Read

 

 

device.

 

 

 

 

CF

CF_nIOW

O8

This pin is an active low write strobe signal for CF

IO Write Strobe

 

 

device.

 

 

 

 

 

 

SmartMedia INTERFACE

 

 

 

 

SM

SM_nWP

O8PD

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

Write Protect

 

 

device.

 

 

 

This pin has a weak pull-down resistor that is

 

 

 

permanently enabled

 

 

 

 

SM

SM_ALE

O8PD

This pin is an active high Address Latch Enable signal

Address Strobe

 

 

for the SM device.

 

 

 

This pin has a weak pull-down resistor that is

 

 

 

permanently enabled

 

 

 

 

SM

SM_CLE

O8PD

This pin is an active high Command Latch Enable signal

Command Strobe

 

 

for the SM device.

 

 

 

This pin has a weak pull-down resistor that is

 

 

 

permanently enabled

 

 

 

 

SM

SM_D[7:0]

I/O8PD

These pins are the bi-directional data signal SM_D7-

Data[7:0]

 

 

SM_D0.

 

 

 

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

 

 

 

down resistor.

 

 

 

 

SM

SM_nRE

08PU

This pin is an active low read strobe signal for SM

Read Enable

 

 

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

SM_nWE

O8PU

This pin is an active low write strobe signal for SM

Write Enable

 

 

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

SM_nWPS

IPU

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

Write Protect Switch

 

 

This pin has an internally controlled weak pull-up

 

 

 

 

 

 

resistor.

 

 

 

 

SM

SM_nB/R

I

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

Busy or Data Ready

 

 

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.

 

 

 

 

Revision 1.6 (06-20-08)

16

SMSC USB2601/USB2602

 

DATASHEET