Urahara
Member
Ok, I feel that I am going to ask a very stupid question. Don't flame me if you think it is.
Pins 2,3 and 5 of a DB9 connector is used to set up a serial port for firmware upgrading purposes via a bootloader.
The other pins (1,4,7-9 of the DB9) are unused. Can I use them, ie connect these unused pins directly to the pins of the microcontroller. That way, I can reduce the number of external connectors on the main board. I can use them to connect to light up external LEDs or even a few relays.
Of course, at any one time, I either use this DB9/RS232 connector as a real RS232 device or an external LED/Relay box.
Just a thought. Thks!
Pins 2,3 and 5 of a DB9 connector is used to set up a serial port for firmware upgrading purposes via a bootloader.
The other pins (1,4,7-9 of the DB9) are unused. Can I use them, ie connect these unused pins directly to the pins of the microcontroller. That way, I can reduce the number of external connectors on the main board. I can use them to connect to light up external LEDs or even a few relays.
Of course, at any one time, I either use this DB9/RS232 connector as a real RS232 device or an external LED/Relay box.
Just a thought. Thks!