In some particular application, few pin count but still need chip to chip communication. This IP use one wire bi-direction (open drain) to communication. Just like UART , it is consist of one TX and one RX. User can define their own payload freedomly.
All devices are connecting through open-drain pull high bus. Every device can send data to others actively.
Waveform
Application
- Analog IC debug
- MCU program port
- Low pin count IC
The RTC is a TSMC 0.13μm Real-Time-Clock cell that provides multiple clocks. This RTC provides an operating voltage range of 2.7V ~ 3.3V, and an operating junction temperature range of -40˚ ~ 125℃.