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STM32F7 DISCO - LCD_INT

alan239955_st
Associate II
Posted on October 11, 2015 at 14:47

On the STM32F7-DISCO a signal from GPIO Port I13 LCD_INT connects to the 480 x 272 LCD.

The STM32F745xx/STM32F746xx datasheet says that the AF14 mode of this pin is LCD_VSYNC. On the DISCO the LCD_VSYNC is on GPIO Port I9. So the documentation implies a duplication.

So what is this PIN? The STM32F7 Cube software sets the pin to AF14... Is the datasheet wrong and this is an interrupt input?
1 REPLY 1
Nesrine M_O
Lead II
Posted on November 02, 2015 at 15:44

Hi  lowit.alan,

1-The STM32F745xx/STM32F746xx datasheet says that the AF14 mode of this pin is LCD_VSYNC. On the DISCO the LCD_VSYNC is on GPIO Port I9. So the documentation implies a duplication.

 

In fact the LCD_VSYNC alternate function is mapped on the PI9 and PI13 pins, so there is no duplication

2-This is an interrupt input?

Yes, you are right the pin LCD_INT is an interrupt input pin.

3-The STM32F7 Cube software sets the pin to AF14

 If you speak about the configuration of both PI9 and PI13 as AF14, please note that the issue is reported internally. 

-Syrine-