App note from ROHM Semiconductor on their voltage detectors IC primarily used in microntroller reset circuitry. Link here (PDF)
Tag Archives: auto-reset
Zero-wire serial auto-reset for Arduino
A followup to the Modify an off-the-shelf CP2102 module as an Arduino programmer post, Ralph Doncaster writes: Instead of modifying the USB-TTL adapters, I modified the AVR board and the avrdude software to reset the AVR with a break signal. This way just Rx, Tx, Gnd and Vcc are needed.