I want to start application from User Flash memory. I must connect BOOT_0 pin to log. 0............. OK But, is it possible to connect BOOT1 pin to log. 0, too ? In datasheet's table it is state ''X'' for BOOT_1 pin and log.0 for BOOT0_0 pin. What ''X'' mean ? 1. Unconnected float pin (Hi-Z) or 2. don´t care (log.1 or log.0) Is it possible to run application from User Flash memory with this configuration: BOOT_0 = log. 0, BOOT_1 = log.0 ? Thanks