UART
Practice with oscill - Interfaces

UART - wide used serial interface. Many cellular phones, microcontrollers, PC's are equipped with it. Active level - low. Amplitude 3...5 V. Consist of start-bit, 5...8 info bits and 1...2 stop-bits. Speed from 150 до 921600 baud.

 

OBEX-packet "Connect", 9600 :

 

Incoming call "RING" - Ericsson mobile phone: