Microchip Technology
Microchip produces microcontrollers with 3 very different architectures:
8-bit (8-bit data bus) PICmicro, with a single accumulator (8 bits):
- PIC10 and PIC12: 12-bit instruction words
- PIC16 series: 14-bit instruction words, one address pointer ("indirect register pair")
- PIC16F628 (Replacement for very popular but discontinued PIC16F84)
- PIC18 series: 16-bit instruction words, three address pointers ("indirect register pairs")
16-bit (16-bit data bus) microcontrollers, with 16 general-purpose registers (each 16-bit)
- PIC24: 24-bit instruction words
- dsPIC: based on PIC24, plus DSP functions, such as a single-cycle MAC (multiply–accumulate) into two 40-bit accumulators.
32-bit (32-bit data bus) microcontrollers:
- PIC32MX series: 32-bit instructions, uses the MIPS architecture
Read more about this topic: List Of Common Microcontrollers
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