PIC18F47Q10 Use TMR4 in One-Shot mode with external signal as reset

The PIC18F47Q10 features Three 8-bit Timers/Counters with One-Shot Operation. In this demo, uses TMR4 peripheral in One-Shot to stop TMR2 if an external pin is pulled to GND for more than a desired period.

Related Documentation

• TB3285 - Getting Started with Timers/Counters on PIC18
• PIC18F47Q10 Product Family Page
• PIC18F47Q10 datasheet

Software Used

• MPLAB® X IDE 5.30 or newer (microchip.com/mplab/mplab-x-ide)
• MPLAB® XC8 2.10 or newer compiler (microchip.com/mplab/compilers)
• MPLAB® Code Configurator (MCC) 3.95.0 or newer (microchip.com/mplab/mplab-code-configurator)
• MPLAB® Code Configurator (MCC) PIC10/PIC12/PIC16/PIC18 library v1.79.0 or newer (microchip.com/mplab/mplab-code-configurator)

Hardware Used

• PIC18F47Q10 Curiosity Nano (DM182029)

Setup

• The PIC18F47Q10 Curiosity Nano Development Board (DM182029) is used as the test platform.
  

The following pin configurations must be made for this project:

Pin	Configuration
RE0	Digital output (LED0)
RC7	Digital input as TMR4 trigger

Operation

1. Build demo firmware, make and program the generated code onto the PIC18F47Q10 Curiosity Nano.
2. Run the code generated with MCC, LED0 will blink with a rate of Timer2Period (100ms).
3. If the external pin RC7 is pulled to GND for more than Timer4Period (500ms), then LED0 will stop blinking.
   

Summary

This project showcases how easy it is to use the TMR4 of PIC18F47Q10 in One-Shot mode with external signal as reset.