Hi I want explanation about the 4pin header(CON8), it's VDDIN,VDD5v,GND,GND how to connect a battery or an eternal power supply to these pins ? when to connect on 5v,GND and when to connect to VDDIN,GND ? another question, What is the maximum current/h the kit consume so that I could estimate the life time of my external DC battery ? Thanks in advance
VDDIN is where you connect your +5V supply to power the board. VDD_5V is actually the output from the board and becomes active when the power switch is ON. Look at the schematic for the board and you will see this. You could connect to the VDD_5V line if you wish to bypass the power switch and ensure that the board is always powered on. As I see you are planning on using a battery to power your board, please be careful that it is only providing maximum 5V to the board otherwise you will fry the system. On the Mini210 there is a 6.3V zener to try and protect from this but it has no current limiting. The VDD_5V line also connects via a resistor divider to the processor. It is also used to power the LCD so again, keep it to 5V. As for current draw, you can insert a multi-meter in the VDDIN line which set to current and read what it draws from your supply. My Mini210 draws approx 300mA at 5V. Dave...
I just checked the schematics for the Tiny210 and 5V is used in a few places so you will definitily need to ensure this is 5V from your battery. Audio codec IR Receiver USB
many thanks for your help Dave, so I could insert my battery to VDDIN, GND and I must be sure it's providing a 5V maximum