arup
Member level 2
hello,
I am planning to use few +5V devices(which were already used in my older project) in my new project with PIC24 chip.My project is based on PIC24FJ128GA110.I want to drive certain +5V operated devices like MUX - hef4067 , Shift register - 74hc595 etc...Can I use Digital i/os of pic24 (+3.3 V micro) to directly drive the control pins of those +5V operated devices ??What I understand is to use those pins i need to ensure following:
a) Those pins need to be configured as opendrain in firmware.They will be l pulled up by external resistors to +5v
b) These pins need to be any digital only pin .They shouldn't be ANx pin.
Pls correct me if i m wrong and also suggest if other precautions has to be taken.
What are the general consideration where 3.3 V operated Micro has to be ineterfaced with +5V operated devices in the Application
Thanks & Regards,
Arup
I am planning to use few +5V devices(which were already used in my older project) in my new project with PIC24 chip.My project is based on PIC24FJ128GA110.I want to drive certain +5V operated devices like MUX - hef4067 , Shift register - 74hc595 etc...Can I use Digital i/os of pic24 (+3.3 V micro) to directly drive the control pins of those +5V operated devices ??What I understand is to use those pins i need to ensure following:
a) Those pins need to be configured as opendrain in firmware.They will be l pulled up by external resistors to +5v
b) These pins need to be any digital only pin .They shouldn't be ANx pin.
Pls correct me if i m wrong and also suggest if other precautions has to be taken.
What are the general consideration where 3.3 V operated Micro has to be ineterfaced with +5V operated devices in the Application
Thanks & Regards,
Arup