AN3325 MC9S08QG8, MC9S08QD4, and MC9RS08KA2 Designing for Migration Among 8-Pin, 8-Bit MCUs
The ability to move effortlessly from one hardware platform to another reduces the development, testing, and manufacturing time. Freescale's Controller Continuum Strategy provides new devices that are pin-to-pin compatible with existing microcontrollers, allowing hardware platforms to be re-used and opening new possibilities to use both more peripherals and functionality or simplifying the design to improve the cost of the final product. Migrating between MCUs is easier to plan for at the low end of the controller continuum spectrum when the MCU is an 8-pin, 8-bit micro with small code size (up to 8K bytes of program space) ecause the pin count limits the number of peripherals a project will use. If designed correctly migrating the software and hardware is much simpler.
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MC9S08QD4, MC9S08QD, MC9RS08KA2, MC9RS08KA, MC9S08QG8, AN3325
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