mcihangir
Newbie level 1
sim300c jpg
I will use a SIM300C Module for a project. I read datasheet and some another documents about SIM300 but i can't understand about VDD_EXT pin.
1) I don't need VDD_EXT functitons so can i leave it floating?
2) Do i have to connect to VDD_EXT pin with a LDO?
3)
Why connect LDO to VDD_EXT pin In this picture ? I take this picture from SIM300 evb schema.
https://img23.imageshack.us/my.php?image=71569875oo7.jpg
thank you
I will use a SIM300C Module for a project. I read datasheet and some another documents about SIM300 but i can't understand about VDD_EXT pin.
1) I don't need VDD_EXT functitons so can i leave it floating?
2) Do i have to connect to VDD_EXT pin with a LDO?
3)
Why connect LDO to VDD_EXT pin In this picture ? I take this picture from SIM300 evb schema.
https://img23.imageshack.us/my.php?image=71569875oo7.jpg
thank you