PICAXE28

PICAXE Microcontroller Summary... PICAXE Type PICAXE-08 PICAXE-08M PICAXE-18 PICAXE-18A PICAXE-18X PICAXE-28A PICAXE-28X PICAXE-40X IC Size 8 8 18 18 18 28 28 40 Memory (lines) 40 80 40 80 600 80 600 600 I/O Pins 5 5 13 13 14 20 21 32 Outputs Inputs ADC (L =low) 1L 3 3L 3 3 4 0-4 3-7 Data Memory 128 - prog 256 - prog 128 - prog 256 256 + i2c 64 + 256 128 + i2c 128 + i2c Polled Interrupt Yes Yes Yes Yes 1-4 1-4 8 8 9 8 9-17 9-17 1-4 1-4 5 5 5 8 0-12 8-20 Notes: The number of memory program lines is approximate as different commands require different amounts of memory. The data memory can be used for storing data values or LCD messages. On the entry level PICAXE-08/18 this memory is shared with the downloaded program and so a longer program decreases the available data memory. The PICAXE-28 has separate ADC pins, with the other types the ADC are combined on the input pins. L denotes a low-resolution ADC function. +V Serial In Pin 4 Pin 3 PICAXE-08 1 2 3 4 8 7 6 5 0V Pin 0 / Serial Out Pin 1 Pin 2 PICAXE-18 Input 2 Serial Out Serial In Reset 0V Output 0 Output 1 Output 2 Output 3 The PICAXE-28 and PICAXE-18 microcontrollers require a 4k7 pull up resistor on the reset pin. The PICAXE-28 microcontrollers require an external 4MHz 3 pin ceramic resonator. Serial Download Circuit: The serial download circuit for all PICAXE microcontrollers is (straight or ‘stereo plug’ cable connections): (USB Adapter USB010 available) 2. to PICAXE serial out 22k serial out serial in 0V 3. to ...