SMSC USB2640i - Manual (Page 60)

Ultra Fast USB 2.0 Multi-Format Flash Media Controller/USB Hub Combo
Revision 2.0 (10-03-08) 60 SMSC USB2640/USB2641
DATASHEET
Chapter 12 GPIO Usage
Table 12.1 USB2640/USB2641 GPIO Usage
NAME
ACTIVE
LEVEL SYMBOL DESCRIPTION AND NOTE
GPIO1 H TxD / LED Serial port transmit line / LED
indicator
GPIO2 H RxD Serial port receive line
GPIO4 H SCK Serial EEPROM clock
GPIO5 H SDA Serial EEPROM data
GPIO6 L SD_WP SD card write protect detect
GPIO10 L CRD_PWR_CTRL Card power control
GPIO12 L MS_nCD Memory Stick card detect
GPIO14 L xD_nCD xD card detect
GPIO15 L SD_nCD Secure Digital card detect