High Speed Inter-Chip USB 2.0 Hub and Flash Media Controller

Datasheet

Chapter 11 GPIO Usage

Table 11.1 USB4640/USB4640i GPIO Usage

 

ACTIVE

 

 

NAME

LEVEL

SYMBOL

DESCRIPTION AND NOTE

 

 

 

 

GPIO1

H

LED / TxD

LED indicator / Serial port transmit line

 

 

 

 

GPIO2

H

RxD

Serial port receive line

 

 

 

 

GPIO4

H

SCL

Serial EEPROM clock

 

 

 

 

GPIO5

H

SDA

Serial EEPROM data

 

 

 

 

GPIO6

L

SD_WP

Secure Digital card write protect assertion

 

 

 

 

GPIO10

L

CRD_PWR_CTRL

Card power control

 

 

 

 

GPIO12

L

MS_nCD

Memory Stick card detect

 

 

 

 

GPIO14

L

xD_nCD

xD-Picture card detect

 

 

 

 

GPIO15

L

SD_nCD

Secure Digital card detect

 

 

 

 

Revision 1.0 (06-01-09)

62

SMSC USB4640/USB4640i

DATASHEET