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HCS12 Folha de dados(PDF) 403 Page - Freescale Semiconductor, Inc

Nome de Peças HCS12
Descrição Electrónicos  HCS12 Microcontrollers
PDF  452 Pages
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Fabricante Electrônico  FREESCALE [Freescale Semiconductor, Inc]
Página de início  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

HCS12 Folha de dados(HTML) 403 Page - Freescale Semiconductor, Inc

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S12CPUV2 Reference Manual, Rev. 4.0
Freescale Semiconductor
403
B.1 Introduction
This appendix discusses similarities and differences between the CPU12
and the M68HC11 CPU. In general, the CPU12 is a proper superset of the
M68HC11. Significant changes have been made to improve the efficiency
and capabilities of the CPU12 without eliminating compatibility and
familiarity for the large community of M68HC11 programmers.
B.2 CPU12 Design Goals
The primary goals of the CPU12 design were:
• Absolute source code compatibility with the M68HC11
• Same programming model
• Same stacking operations
• Upgrade to 16-bit architecture
• Eliminate extra byte/extra cycle penalty for using index register Y
• Improve performance
• Improve compatibility with high-level languages
Reference Manual — S12CPUV2
Appendix B. M68HC11 to CPU12 Upgrade Path



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