Calcolatore Spazio Indirizzi Memoria — Formula
## SPI Data Rate
SPI (Serial Peripheral Interface) transfers one bit per clock cycle. The effective rate depends on clock speed and protocol overhead.
### Formulas
**Raw Rate = Clock Speed / 8** (bytes per second)
**Effective Rate = Clock x Data Bits / (Data Bits + Idle) / 8**
Idle clocks account for chip-select toggling and inter-transfer gaps. SPI has no addressing overhead unlike I2C, making it faster for bulk transfers.
SPI (Serial Peripheral Interface) transfers one bit per clock cycle. The effective rate depends on clock speed and protocol overhead.
### Formulas
**Raw Rate = Clock Speed / 8** (bytes per second)
**Effective Rate = Clock x Data Bits / (Data Bits + Idle) / 8**
Idle clocks account for chip-select toggling and inter-transfer gaps. SPI has no addressing overhead unlike I2C, making it faster for bulk transfers.
Esempio Risolto
8 MHz SPI clock, 8-bit transfers, 2 idle clocks between transfers.
- Raw rate: 8e6 / 8 = 1.00 MB/s
- Clocks per transfer: 8 + 2 = 10
- Effective rate: 8e6 x 8 / 10 / 8 = 0.80 MB/s
- Bus efficiency: 8 / 10 = 80%