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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
Associate III

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 .

2 REPLIES 2
S.Ma
Principal

0693W00000YABDqQAP.pngMaybe the pullup is in case the MEMs is used only in I2C bus mode and NSS is not connected?

ck.1
Associate III

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 .

0693W00000YATrFQAX.png