USB2250 datasheet(17/36 Pages) SMSC

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Ultra Fast USB 2.0 Multi-Format Flash Media Controller

Datasheet

SMSC USB2250/51/59

Revision 2.6 (05-08-08)

DATASHEET

SM Chip

Enable

SM_nCE

O12PU

This pin is the active low chip enable signal to the

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, 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).

SM Card

Detection

GPIO

SM_nCD

(GPIO14)

I/O12

This is a GPIO designated as the Smart Media

card detection pin.

MEMORY STICK INTERFACE

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 Card

Insertion GPIO

MS_INS

(GPIO12)

IPU

This is a GPIO designated as the Memory Stick

card detection pin.

MS System

CLK

MS_SCLK

101

O12

This pin is an output clock signal to the MS

device.

The clock frequency is software configurable.

MS System

Data In/Out

MS_D[7:1]

100

I/O12PD

MS_D[7:0]: These pins are the bi-directional data

signal for the MS device. 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 System

Data In/Out

MS_D0 /

MS_SDIO

I/O12PD

MS_D0: This pin is one of 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_SDIO: Serial Data Bus. Transfer direction and

types of data change depending on the Bus State.

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

NAME

SYMBOL

128-PIN

VTQFP

BUFFER

TYPE

DESCRIPTION

USB2250 Datasheet(PDF) 17 Page - SMSC Corporation

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