* I2C, SPI, async serial
* digital I/O
* [Measurement Specialties MS5607](http://www.meas-spec.com/product/pressure/MS5607-02BA03.aspx) pressure sensor
- * 2MB SPI flash
+ * 1MB SPI flash
* Software Features
* Written mostly in C with some ARM assembler
* Runs from on-chip flash, uses on-chip RAM, stores flight data to