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MC908QT4MDWE Datasheet(PDF) 25 Page - Freescale Semiconductor, Inc |
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MC908QT4MDWE Datasheet(HTML) 25 Page - Freescale Semiconductor, Inc |
25 / 184 page MC68HC908QY/QT Family Data Sheet, Rev. 5 Freescale Semiconductor 25 Chapter 2 Memory 2.1 Introduction The central processor unit (CPU08) can address 64 Kbytes of memory space. The memory map, shown in Figure 2-1, includes: • 4096 bytes of user FLASH for MC68HC908QT4 and MC68HC908QY4 • 1536 bytes of user FLASH for MC68HC908QT2, MC68HC908QT1, MC68HC908QY2, and MC68HC908QY1 • 128 bytes of random access memory (RAM) • 48 bytes of user-defined vectors, located in FLASH • 416 bytes of monitor read-only memory (ROM) • 1536 bytes of FLASH program and erase routines, located in ROM 2.2 Unimplemented Memory Locations Accessing an unimplemented location can have unpredictable effects on MCU operation. In Figure 2-1 and in register figures in this document, unimplemented locations are shaded. 2.3 Reserved Memory Locations Accessing a reserved location can have unpredictable effects on MCU operation. In Figure 2-1 and in register figures in this document, reserved locations are marked with the word Reserved or with the letter R. |
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