Need help - SPI and internal pull-up
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2016-10-08 1:46 PM
Posted on October 08, 2016 at 22:46
Hi,
I use STM32L073 and configure SPI port. Problem is my slave device has SPI_MISO pin as open-drain, very uncommon. Question is if I configure MCU pin as SPI_MISO can I have also pull-up function on that pin or need external? Darko
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2016-10-09 3:18 AM
Posted on October 09, 2016 at 12:18
> Question is if I configure MCU pin as SPI_MISO can I have also pull-up function on that pin
Yes. However, the internal pull-up is relatively weak - check if the resulting RC (with the parasitic C of the MISO pins and tracks) is fast enough for your bitrate. JW