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Question about GPIO port defined as AF

Question asked by RomeyRC on Dec 4, 2012
Latest reply on Dec 4, 2012 by RomeyRC
I noticed on the STM3210E-EVAL board design and in the demo code GPIO port A was defined as AF for SPI1 and for USART. The chip select pin for the SPI flash memory was defined as pin 2 in GPIO port B. Does it mean once port A is defined as AF, all the pins have to be AF? Can I define Port A poin 4 as SPI flash chip select?

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