USB2227_06 datasheet(27/27 Pages) SMSC

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4th Generation USB2.0 Flash Media Controller with Integrated Card Power FETs

Datasheet

SMSC USB2227/USB2228

Revision 1.91 (10-13-06)

DATASHEET

Chapter 8 GPIO Usage

Table 8.1 GPIO Usage (ROM Rev 0x00)

NAME

ACTIVE

LEVEL

SYMBOL

DESCRIPTION AND NOTE

GPIO1

Flash Media Activity LED/

xD_Door

Indicates media activity. Media or USB

cable must not be removed with LED lit.

Also may be used for xD Door

functionality

GPIO2

EE_CS

Serial EE PROM chip select

GPIO3

V_BUS

USB V bus detect

GPIO4

EE_DIN/EE_DOUT/xDID

Serial EE PROM input/output and xD

Identify

GPIO5

HS_IND/SD_CD

HS Indicator LED or SD Card Detect

Switch input

GPIO6

A16/ROMEN

A16 address line connect for DFU or

debug LED indicator optional.

GPIO7

EE_CLK/

UNCONF_LED

Serial EE PROM clock output or

Unconfigured LED.

GPIO8

MS_PWR_CTRL/

CRD_PWR0

Memory Stick Card Power Control, or

Internal Power FET0.

GPIO9

CF_PWR_CTRL

CompactFlash Card Power Control

GPIO10

SM_PWR_CTRL/

CRD_PWR1

SmartMedia Card Power Control, or

Internal Power FET1.

GPIO11

SD/MMC_PWR_CTRL/

CRD_PWR2

SD/MMC Card Power Control, or

Internal Power FET2.

GPIO12

MS_ACT_IND/

Media Activity

Memory Stick Activity Indicator, or

Media Activity LED.

GPIO13

CF_ACT_IND

CompactFlash Activity Indicator

GPIO14

SM_ACT_IND

SmartMedia Activity Indicator

GPIO15

SD/MMC_ACT_IND

SD/MMC Activity Indicator

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