We connected STM32F051 to ASM330 over SPI . The communication works Chip select as a GPIO line the SPI is not able to correctly toggle the Chip select . There is a 10K ohm Pull-Up resistor on the Chip Select Line between STM and ASM . Is this correct ?

ck.1 · ‎2023-02-07

Hi ,

We connected STM32F051 to ASM330 over SPI .

The communication works Chip select as a GPIO line the SPI is not able to correctly toggle the Chip select . There is a 10K ohm Pull-Up resistor on the Chip Select Line between STM and ASM . Is this correct ?.

What is the suggested solution for the Chip select line to be controlled with SPI and not to use Chip select as GPIO .

S.Ma · ‎2023-02-07

Maybe the pullup is in case the MEMs is used only in I2C bus mode and NSS is not connected?

ck.1 · ‎2023-02-10

Further Chip Select changes between SPI based CHIP SELECT and GPIO Toggling test results

The Left Side Screen shows with Chip Select controlled by SPI , Right Side screen shows Chip Select controlled as GPIO toggling works with ASM330 .

The Chip Select Controlled by SPI does not work where as the Chip Select controlled as GPIO Toggling works with ASM330 .