Datasheet

High-Speed Inter-Chip (HSIC) USB 2.0 Hub and Flash Media Controller
Datasheet
SMSC USB4640/USB4640i 57 Revision 1.3 (03-13-13)
DATASHEET
Chapter 7 GPIO Usage
Table 7.1 USB4640/USB4640i GPIO Usage
NAME
ACTIVE
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