SPI Clock Calculator

Calculate SPI clock speed, prescaler values, and data transfer timing.

SPI Configuration

System Clock (Hz)

Target SPI Speed (Hz)

Bits per Transfer

SPI Mode

Data Size for Transfer (bytes)

SPI Speed

4.000

MHz

4

Prescaler

Timing

Bit Time250.0 ns

Byte Time2.00 us

Transfer Time (1024 bytes)2.05 ms

Data Rate500.0 KB/s

Mode Configuration

CPOL0

CPHA0

Clock EdgeRising

SampleFirst Edge