Below are compiled outside resources that we reference often.
[communication] (6)
The [UART] protocol is documented in Chapter 21 of NXP (2012). It's an ASCII protocol that automatically syncs to your baud rate...
Microcontroller Exploits pg 44
...one of the most commonly encountered serial interfaces.
A low pin-count, controller-peripheral, source-synchronous serial interface.
A very low-level way of communicating with a microcontroller, either for debugging or for initial programming at the device factory.
Microcontroller Exploits pg 91
A common hardware debugging interface...
...reduced-pin variant[s] of JTAG...require fewer pins and [are] sometimes easier to implement than the 4-wire variants of the protocols.
Microcontroller Exploits pg 91