USB2240 datasheet(16/28 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

General

Purpose I/O

GPIO2 /

RXD /

SDA

I/O12

GPIO: This pin may be used either as input, edge

sensitive interrupt input, or output.

RXD: In addition to the above, the signal can be

used as input to the RXD of UART in the device,

when the TXD_RXD_SEL bit in UTIL_CONFIG1

I/O12

SDA: This is the data pin when used with an

external serial EEPROM.

General

Purpose I/O

GPIO4

I/O12

This pin may be used either as input, edge sensitive

interrupt input, or output.

For the USB2240 only, this pin can be used as the

xD card detection pin.

General

Purpose I/O

GPIO7 /

TXD /

SCK /

MS_SKT_SEL

I/O12

GPIO: This pin may be used either as input, edge

sensitive interrupt input, or output.

O12

TXD: In addition, as an output, the GPIO7 can be

used as an output TXD of UART in the device, when

the GPIO2/TXD bit in UTL_CONFIG register is set

to "1"

O12

SCK: This is the clock output when used with an

external EEPROM.

MS_SKT_SEL: On the positive edge of nRESET,

this pin is sampled to determined the Memory Stick

socket size.

1 = 8 bit

0 = 4 bit

General

Purpose I/O

GPIO10

(CRD_PWR)

I/O200

GPIO: This pin may be used either as input, edge

sensitive interrupt input, or output.

CRD_PWR: Card Power drive of 3.3V @ either

100mA or 200mA.

RESET Input

nRESET

This active low signal is used by the system to reset

the chip. The active low pulse should be at least 1

μs

wide.

TEST Input

TEST

This signal is used for testing the chip. User should

normally tie this pin low externally, if the test function

is not used.

DIGITAL / ANALOG / POWER

+1.8V Core

power

VDD18

All VDD18 pins must be connected together on the

circuit board.

+1.8V core power. This pin must have a 1.0

μF (or

greater) ±20% (ESR <0.1

Ω) capacitor to VSS.

3.3V Power &

Regulator

Input.

VDD33

3.3V Power & Regulator Input.

3.3V Analog

Power

VDDA33

3.3V Analog Power

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

NAME

SYMBOL

36-PIN

QFN

BUFFER

TYPE

DESCRIPTION

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