Differences between FXAS21000 and FXAS21002
A section contains tables that describe the functions of the FXAS21000 and FXAS21002 pinouts. The most significant difference is Pin 8. On the FXAS21000, Pin 8 is not used. On the FXAS21002, Pin 8 is used to select the digital communications mode, either I2C or SPI. To select I2C mode, connect Pin 8 to GND. To select SPI mode, connect Pin 8 to VDDIO.
More functionality has been added to Pin 2 of the FXAS21002. In addition to being an interrupt output, Pin 2 can serve as an input to provide power state control.
View the PDF document for more information.
Originally published by Freescale Semiconductor at www.freescale.com as "FXAS21000 and FXAS21002 Compatibility".