Spmi Vs I2c

Modern CPUs change voltage hundreds of times per second to save power. I2C’s handshaking and start/stop conditions introduce delays. SPMI uses a streamlined "register write" with less overhead, allowing faster voltage transitions.

is famously simple. You can bit-bang it on two GPIO pins in 10 lines of C code. Every microcontroller has at least one hardware I2C peripheral. spmi vs i2c