Freescale Semiconductor Demonstration Board for Freescale MC9S12XHY256 Microcontroller DEMO9S12XHY256 DEMO9S12XHY256 Manual De Usuario

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Freescale Semiconductor

The CPU12X is a high-speed, 16-bit processing unit that has a programming model identical to that of the
industry standard M68HC11 central processor unit (CPU).

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Upward compatible with S12 instruction set, with the exception of five Fuzzy instructions (MEM,
WAV, WAVR, REV, REVW) which have been removed

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Enhanced indexed addressing

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Access to large data segments independent of PPAGE

On-chip flash memory on the MC9S12XHY features the following:

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Up to 256Kbyte of program flash memory
— 64data bits plus 8 syndrome ECC (error correction code) bits allow single bit error correction

and double fault bit detection

— Erase sector size 1024bytes
— Automated program and erase algorithm
— Protection scheme to prevent accidental program or erase
— Security option to prevent unauthorized access
— Sense-amp margin level setting for reads

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8Kbyte data flash space
— 16 data bits plus 6 syndrome ECC (error correction code) bits allow single bit error correction

and double fault detection

— Erase sector size 256 bytes
— Automated program and erase algorithm
—

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Up to 12Kbytes of general-purpose RAM

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Loop control Pierce oscillator using a 4 MHz to 16 MHz crystal

— Current gain control on amplitude output

— Signal with low harmonic distortion

— Low power

— Good noise immunity

— Eliminates need for external current limiting resistor

— Transconductance sized for optimum start-up margin for typical crystals