Im currently evaluating which STM32F7 controller for use in a HMI project. I was studying the connections required for the 24bit LCD interface on the STM32F746VG (100 LQFP). Looking at the GPIO alternate function mapping tables in the data sheet I cant find connections for LCD_R0 or LCD_B1 on the 100 LQFP variants. I also found 2 instances of LCD_R4 on pins PA11 and PA5. This has left me a little confused. Any help would be greatly appreciated. Thanks Stuart
Pins placement/assignment to AFs is a matter of tradeoff - increasing number of AFs per pin and increasing number of pins per AF both increase silicon area. ST also tries hard to maintain pin compatibility - OK the QFP100 is layout-incompatible (due to one whole side is shifted by one pin to make space for an extra supply pin), but still the port.pin-to-AF scheme is largely compatible across the whole STM32 family. JW
So, nothing to worry, when using 18-bit mode, you have R2-R7, G2-G7, B2-B7 (6+6+6=18), when using 16-bit mode, you must use R3-R7, G2-G7, R3-R7 (5+6+5=16).
