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MC908QY1VDTE Datasheet(PDF) 25 Page - Freescale Semiconductor, Inc

No. de Pieza. MC908QY1VDTE
Descripción  Microcontrollers
Descarga  184 Pages
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Fabricante  FREESCALE [Freescale Semiconductor, Inc]
Página de inicio  http://www.freescale.com
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MC908QY1VDTE Datasheet(HTML) 25 Page - Freescale Semiconductor, Inc

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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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