DCMI and FSMC problem

erikszah2 · ‎2012-07-03

Posted on July 03, 2012 at 22:18

Hi,

I am designing device using 100 pin STM32F207 mcu and I was planning to connect camera to DCMI peripheral and SRAM to multiplexed FSMC using latches. But in process of drawing schematic I noticed that FSMC pin that controls latches (FSMC_NL or FSMC_NADV) is also DCMI_VSYNC and there is no alternative pin for that. Although in table 93 in datasheet it is shown that it is possible to use DCMI and muxed SRAM together.

Is there any solution for this problem or I need to go for 144 pin controller?

Thank you!

#dcmi-fsmc-dcmi_vsync-fsmc_nl

stbbrad3 · ‎2012-07-03

Posted on July 04, 2012 at 04:37

A quick look at the F207 datasheet shows PB7 and PI5 alternate function as DCMI_VSYNC. You can use PI5 as your VSYNC and PB7 as you FSMC_NL.

erikszah2 · ‎2012-07-04

Posted on July 04, 2012 at 11:19

This solution would work for BGA or 176 pin mcu, but as I am using only 100 pin mcu, it does not have this port.