team-302.github.io

1. Determine your project-specific requirements 3. Look up specifications in the PIC datasheet
Design Considerations

Team Project-Specific Requirements

from Problem Definition and Block Diagram

 PIC Option 1 PIC Option 2 PIC Option 3
How many GPIO Pins?1 8 pins 25 25 36
Built-in Analog to Digital Converter? How many? 0 1 1 1
Built-in Hardware PWM? How many? 2 2 2 2
Built-in I2C? SPI? How many? 2 2 2 2
Built-in UART? How many? 2 2 2 2
Other Required Built-In Features? (optional)
Additional considerations specific to your project specifications (optional)
2. Find 3 microcontrollers that meet your team project-specific requirements and find information on each 4. Look up part details in the PIC datasheet
Microcontroller Considerations Instructions PIC Option 1 PIC Option 2 PIC Option 3
Part Number2 Include the entire part number (leave off any letters at the end that specify the package type) PIC18F27Q10 PIC18F26Q10 PIC18F46Q10
Link (URL) to product page Do not paste links directly into the table. Instead, link them like this. link link link
Links (URL) to Data Sheets link link link
Links (URL) to Application Notes Often provided by manufacturers to give you specific examples of how to use their products. Search for them in the search bar on the Microchip’s website. link link link
Links (URL) to Code Examples link link link
Links (URL) to External Resources Search on Google and YouTube for other resources for each specific microcontroller. link link
Production Unit Cost Find in the Microchip online store, or Digikey $1.54 $1.28 $1.96
Supply Voltage Range Find in the microcontroller datasheet 1.8-5.5 v 1.8-5.5 v 1.8-5.5v
Absolute Maximum Current for entire IC Find in the microcontroller datasheet 350 mA 350 mA 350 mA
Maximum GPIO Pin Current (Source/Sink) Find in the microcontroller datasheet 50 mA 50 mA 50 mA
8-bit or 16-bit Architecture Find in the microcontroller datasheet 16-bit 16-bit 16-bit
Available IC Packages / Footprints Find in the microcontroller datasheet. Choose a microcontroller with both surface mount and DIP/through-hole packages available. See Most Common Mistakes below for requirements to improve manufacturing reliability. Both yes Both yes Both yes
Supports External Interrupts? Find in the microcontroller datasheet yes yes yes
In-System Programming Capability and Type Allows for programming the microcontroller without removing it from the PCB. Find in the microcontroller datasheet. ICSP ICSP ICSP
Programming Hardware, Cost, and URL Find on the microcontroller product page curiosity nano link/microchip snap link free curiosity nano link/microchip snap link free curiosity nano link/microchip snap link free
Works with MPLAB® X Integrated Development Environment (IDE)? Required. See Microchip Development Tools yes yes yes
Works with Microchip Code Configurator? Required. Go to the MCC website, click the “Manual Downloads” tab, scroll to the device library that goes with the PIC you chose (likely “MCC 8-bit PIC”) and read the release notes to make sure your microcontroller is in the list of supported devices. yes yes yes

  1. No PIC16F887, PIC16F917, PIC18F47Q10, or dsPICs allowed↩︎

  2. General Purpose Input/Output Pins - calculate based on your block diagram and include at least 20% more than you need. Avoid using In-System Programming (ISP) pins for GPIO.↩︎

5. Write overall pros, cons, and rankings for the chosen microcontrollers
Overall Pros Write at least 2 for each microcontroller

  • smaller footprint

  • 128 KB Flash Program Memory (Highest of the three)

  • cheapest of the three

  • smaller footprint

  • 10-bit ADC with computation, 35 channels

  • Larger selection of pins
Overall Cons Write at least 2 for each microcontroller

  • low in stock

  • only one I2C/SPI

  • may not be available yet

  • only 1 EUSART

  • largest footprint

  • most expensive
Ranking 1 = first, 2 = second, 3 = third 1 2 3

6. Final Microcontroller Choice: PIC18F27Q10

Rationale: The PIC18F27Q10 is the best selection due to its small footprint which will fit best on our PCB and having the most flash memory of the three options. The price is reasonable and it checks out with all the requirements needed for our product.

Screenshot for PIC18f26Q10

screenshot for PIC18f27Q10

screenshot for pic18f46q10