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STM32 GPIO PA8 to PA15

Hi, I am trying to interface clrc632 chip to STM32 GPIO PA0-PA3 AND PA11-PA13(interfacing D0 to D8 datalines of clrc632 chip) I have to write register values to these line and then read them when I use

temp=GPIOA->IDR;

temp should give all value of GPIOA(PA0 to PA15) but it only gives the value PA0 to PA7 what should I do to get the whole value PA0 to PA15 at once in IDR

regards
rupesh