USB2240 datasheet(14/28 Pages) SMSC

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Ultra Fast USB 2.0 Multi-Format Flash Media Controller

Datasheet

Revision 2.6 (05-08-08)

SMSC USB2240/USB2241

DATASHEET

xD Write

Enable

xD_nWE

O12PU

This pin is an active low write strobe signal for xD

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, and is controlled by the SM_PU

bit of the SM_CTL register.

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

then the internal pull-up is not available (external

pull-ups must be used).

xD Busy or

Data Ready

xD_nB/R

IPU

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

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, and is controlled by the SM_PU

bit of the SM_CTL register.

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

then the internal pull-up is not available (external

pull-ups must be used).

xD Card

Detection GPIO

GPIO14

(xD_nCD)

I/O12

This is a GPIO designated as the xD card detection

pin.

xD Chip Enable

xD_nCE

O12PU

This pin is the active low chip enable signal to the

xD 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, and is controlled by the SM_PU

bit of the SMC_CTL register.

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

then the internal pull-up is not available (external

pull-ups must be used).

MEMORY STICK INTERFACE

MS System

Data In/Out

MS_D[7:0]

I/O12PD

These pins are the bi-directional data signals for the

MS device. In serial mode, the most significant bit

(MSB) of each byte is transmitted first by either

MSC or MS device on MS_D0. MS_D0, MS_D2,

and MS_D3 have weak pull-down resistors. MS_D1

has a pull down resistor if in parallel mode,

otherwise it is disabled. In 4 or 8 bit parallel mode,

there is a weak pull-down resistor on all MS_D7 - 0

signals. The resistors are controlled by

MSC_SYSTEM_0, MSC_MODE_CTL and

MSC_PRO_HG registers.

MS Bus State

MS_BS

O12

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

CLK

MS_SCLK

O12

This pin is an output clock signal to the MS device.

The clock frequency is software configurable.

Table 5.1 USB2240/USB2241 36-Pin QFN Pin Descriptions (continued)

NAME

SYMBOL

36-PIN

QFN

BUFFER

TYPE

DESCRIPTION

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