Why spi faster than i2c?

SPI (Serial Peripheral Interface) is generally faster than I2C (Inter-Integrated Circuit) because it uses multiple data lines, allowing for simultaneous data transmission. SPI typically operates at higher clock speeds, often exceeding 10 MHz, while I2C is usually limited to 400 kHz for standard modes, with some high-speed modes reaching up to 3.4 MHz. Additionally, SPI has a simpler protocol with no addressing overhead, which contributes to its higher data transfer rates.