PICAXE-28X2 Microcontroller Chip
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PICAXE-28X2 microcontroller chip. Second generation chip with many more features and greater pin flexibility. 28X2 (December 2010)
The original 28X2 parts were based upon the PIC18F2520 microcontroller. As this was a 5V only part, a special 3V variant called the 28X2-3V was also produced, based upon the 3V equivalent microcontroller, the PIC18F25K20. A new upgraded version of this microcontroller, the PIC18F25K22, has now been released. This is an enhanced version microcontroller that has several advantages over the previous two parts: - Full 2.1 to 5.5V operating range in one chip, meaning no need for separate 3V and 5V parts - Increased optional clock speed, 64MHz external, 16MHz internal (default is still 8MHz internal) - Many additional ADC channels, with individual ADC pin masking - New support for touch sensors on all ADC channels - Added support for RFIN and RFOUT commands for Manchester encoded wireless radio communication - New HPWM module with power steering - Two additional PWM channels with separate timers (so now 4 PWM channels available on 28pin parts) - New SR latch, voltage reference and DAC output modules Therefore the 28X2 firmware has now been migrated to the new 18F25K22 part, with the original 2 parts superseded. Within the PICAXE manuals the parts are now referred to with the following names (28X2, 28X2-5V or 28X2-3V): Full Product image:
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