USB2250 datasheet(20/36 Pages) SMSC

20 / 36 page

Ultra Fast USB 2.0 Multi-Format Flash Media Controller

Datasheet

Revision 2.6 (05-08-08)

SMSC USB2250/51/59

DATASHEET

Memory Chip

Enable

nMCE

O12

Program Memory Chip Enable; active low.

This signal is asserted when any external access

is being done by the processor.

This signal is held to logic 'high' while nRESET is

asserted.

MISC

General

Purpose I/O

LED1 / GPIO1

120

I/O12

This pin may be used either as input, edge

sensitive interrupt input, or output.

In addition, as an output, the GPIO1 can be used

output controlled by the LED1_GPIO1 register.

General

Purpose I/O

GPIO3

(VBUS_DET)

121

I/O12

This pin may be used either as input, edge

sensitive interrupt input, or output.

This pin is not 5V tolerant. An external resistor

divider must be used when connected to VBUS.

General

Purpose I/O

GPIO4

(SCL)

118

I/O12

This pin may be used either as input, edge

sensitive interrupt input, or output.

O12

SCL: This is the clock output when used with an

external EEPROM.

General

Purpose I/O

GPIO5

(SDA)

I/O12

This pin may be used either as input, edge

sensitive interrupt input, or output.

SDA: This is the data pin when used with an

external serial EEPROM.

General

Purpose I/O

GPIO8 /

CRD_PWR0

I/O12

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

sensitive interrupt input, or output.

I/O200

CRD_PWR: Card Power drive of 3.3V @ either

100mA or 200mA.

General

Purpose I/O

GPIO9 /

CRD_PWR1

I/O12

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

sensitive interrupt input, or output.

I/O200

CRD_PWR: Card Power drive of 3.3V @ either

100mA or 200mA.

General

Purpose I/O

GPIO10 /

CRD_PWR2

I/O12

GPIO: These pins may be used either as input,

edge sensitive interrupt input, or output. It is a

requirement that this is the only FET used to

power SM devices. Failure to do this will violate

SM voltage specification on SM device pins.

I/O200

CRD_PWR: Card Power drive of 3.3V @ either

100mA or 200mA.

General

Purpose I/O

GPIO11 /

CRD_PWR3

I/O12

GPIO: These pins may be used either as input,

edge sensitive interrupt input, or output.

I/O200

CRD_PWR: Card Power drive of 3.3V @ either

100mA or 200mA.

Table 5.1 USB2250/51/59 128-Pin VTQFP Pin Descriptions (continued)

NAME

SYMBOL

128-PIN

VTQFP

BUFFER

TYPE

DESCRIPTION

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