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LPC1313 SSEL pin as GPIO for SPI

Question asked by prachipanse on Apr 3, 2017
Latest reply on Apr 5, 2017 by Kerry Zhou

Hi,

 

I want to interface a microSD card to the SSP1 interface of LPC1313. The initialization sequence for the SD card requires assertion and deassertion of the SSEL signal, without any corresponding read write transaction. In this case, can the SSEL pin be used as required when configured as SSEL or does it require to be used as a GPIO?

I have referred to the SSEL as Gpio for SSP/SPI  link but have been unable to toggle for the initialization using both ways. Please let me know how this can be achieved?

 

Regards,

Prachi

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