Low Energy UART - AN0017 - Application Note - Energy Micro

...the world's most energy friendly microcontrollersTable of Contents1. LEUART Theory ....................................................................................................................................... 21.1. General theory ............................................................................................................................... 22. LEUART Configuration ............................................................................................................................... 32.1. Frames, Transmission & Parity .......................................................................................................... 32.2. Clock Sources ................................................................................................................................ 32.3. Baud rates .................................................................................................................................... 32.4. DMA Integration ............................................................................................................................. 42.5. Pulse Generator and Extender .......................................................................................................... 42.6. Interrupts ....................................................................................................................................... 42.7. Freeze Mode and LF Domain Synchronisation ..................................................................................... 42.8. Half-Duplex Operation ..................................................................................................................... 52.9. GPIO and Routing .......................................................................................................................... 53. Software Examples .................................................................................................................................... 63.1. Listening and Receiving in EM2. ........................................................................................................ 63.2. Transmitting in EM2. ....................................................................................................................... 64. Revision History ........................................................................................................................................ 74.1. Revision 1.07 ................................................................................................................................. 74.2. Revision 1.06 ................................................................................................................................. 74.3. Revision 1.05 ................................................................................................................................. 74.4. Revision 1.04 ................................................................................................................................. 74.5. Revision 1.03 ................................................................................................................................. 74.6. Revision 1.02 ................................................................................................................................. 74.7. Revision 1.01 ................................................................................................................................. 74.8. Revision 1.00 ................................................................................................................................. 7A. Disclaimer and Trademarks ........................................................................................................................ 8A.1. Disclaimer ..................................................................................................................................... 8A.2. Trademark Information .................................................................................................................... 8B. Contact Information ................................................................................................................................... 9B.1. Energy Micro Corporate Headquarters ................................................................................................ 9B.2. Global Contacts ............................................................................................................................. 92013-05-08 - an0017_Rev1.07 10 www.energymicro.com