Harfield Design Limited

We at Harfield Design use the Microchip microcontrollers for all embedded design.  We primarily use the PIC18F, PIC24, dsPIC30, dsPIC33, and PIC32 families for our design work. 

• The PIC18F family provides general purpose 8 bit microcontrollers having between 18 and 100 pins.
• The PIC24 family provides general purpose 16 bit microcontrollers having between 44 and 100 pins.
• The dsPIC30 family provides 16 bit microcontrollers with dedicated dsp having between 44 and 100 pins.
• The dsPIC33 family provides 16 bit microcontrollers with dedicated dsp having between 44 and 100 pins.
• The PIC32 family provides general purpose 32 bit microcontrollers having between 44 and 100 pins.

We have designed hardware and firmware prototypes specifically using the 8 bit PIC18F2520, PIC18F4520,PIC18F2550, and PIC18F4550 microcontrollers using the Microchip USB framework.  Also we have used the 8 bit PIC18F66J65 and PIC18F67J60 microcontrollers with inbuilt Ethernet.  We have also designed hardware and firmware utilising the PIC24FJ128GA010, dsPIC30F4011, dsPIC30F4012, dsPIC33FJ256GP710 16 bit microcontrollers. 

Our most complex project to date uses the PIC18F2550 (PC USB Gateway), PIC24FJ128GA010 (Touch Screen Graphics Controller), dsPIC33FJ256GP710 (audio controller/analyser) and dds and audio filtering circuitry on a single circuit borad.  The 2550 provides the usb connection allowing control and reprogramming of the firmware in the other 2 microcontrollers from a PC.  This product is still in the beta development stages and is an internal project.