Chapter 10 gpio usage – SMSC USB2244 User Manual
Page 22
Ultra Fast USB 2.0 SD/MMC Flash Media Controller
Datasheet
Revision 1.0 (05-27-08)
22
SMSC USB2244/USB2244i
DATASHEET
Chapter 10 GPIO Usage
Table 10.1 USB2244/USB2244i GPIO Usage (ROM Rev 0x00)
NAME
ACTIVE LEVEL
SYMBOL
DESCRIPTION AND NOTE
GPIO1
H
LED1
LED indicator
GPIO2
H
RXD / SDA
Receive Port of Debugger / Serial
EEPROM Data
GPIO4
USER
GPIO
User defined
GPIO7
H
TXD / SCK
Transmit Port of Debugger / Serial
EEPROM Clock
GPIO10
L
CRD_PWR
Card Power Control
GPIO12
USER
GPIO
User defined
GPIO14
USER
GPIO
User defined
GPIO15
L
SD_nCD
Secure Digital card detect
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