5th Generation Hi-Speed USB Flash Media & IrDA Controller with Integrated Card Power FETs

Datasheet

Revision 1.2 (02-21-05)

14

SMSC USB2229/USB2230

DATASHEET

CF

Card Detection2

CF_nCD2

IPU

This card detection pin is connected to the ground on

the CF device, when the CF device is inserted.

This pin has an internally controlled weak pull-up

resistor.

CF

Card Detection1

CF_nCD1

IPU

This card detection pin is connected to ground on the

CF device, when the CF device is inserted.

This pin has an internally controlled weak pull-up

resistor.

CF

Hardware Reset

CF_nRESET

O8

This pin is an active low hardware reset signal to CF

device.

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).

Table 6.1 USB2229/USB2230 Pin Descriptions

NAME

SYMBOL

BUFFER

TYPE

DESCRIPTION