JAJSQ97J may 2009 – january 2021 XIO2001
PRODUCTION DATA
Up to five general-purpose input/output (GPIO) terminals are provided for system customization. These GPIO terminals are 3.3-V tolerant.
The exact number of GPIO terminals varies based on implementing the clock run, power override, and serial EEPROM interface features. These features share four of the five GPIO terminals. When any of the three shared functions are enabled, the associated GPIO terminal is disabled.
All five GPIO terminals are individually configurable as either inputs or outputs by writing the corresponding bit in the GPIO control register at offset B4h (See Section 8.4.60). A GPIO data register at offset B6h exists to either read the logic state of each GPIO input or to set the logic state of each GPIO output. The power-up default state for the GPIO control register is input mode.