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MC68HC908GR16A Datasheet(PDF) 27 Page - Freescale Semiconductor, Inc

No. de Pieza. MC68HC908GR16A
Descripción  M68HC08 Microcontrollers
Descarga  270 Pages
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Fabricante  FREESCALE [Freescale Semiconductor, Inc]
Página de inicio  http://www.freescale.com
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MC68HC908GR16A Datasheet(HTML) 27 Page - Freescale Semiconductor, Inc

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MC68HC908GR16A Data Sheet, Rev. 1.0
Freescale Semiconductor
27
Chapter 2
Memory
2.1 Introduction
The CPU08 can address 64 Kbytes of memory space. The memory map, shown in Figure 2-1, includes:
15,872 bytes of user FLASH memory
1024 bytes of random-access memory (RAM)
406 bytes of FLASH programming routines read-only memory (ROM)
36 bytes of user-defined vectors
350 bytes of monitor ROM
2.2 Unimplemented Memory Locations
Accessing an unimplemented location can cause an illegal address reset. In the memory map
(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 microcontroller (MCU) operation. In the
Figure 2-1 and in register figures in this document, reserved locations are marked with the word Reserved
or with the letter R.
2.4 Input/Output (I/O) Section
Most of the control, status, and data registers are in the zero page area of $0000–$003F. Additional I/O
registers have these addresses:
$FE00; break status register, SBSR
$FE01; SIM reset status register, SRSR
$FE02; reserved
$FE03; break flag control register, SBFCR
$FE04; interrupt status register 1, INT1
$FE05; interrupt status register 2, INT2
$FE06; interrupt status register 3, INT3
$FE07; reserved
$FE08; FLASH control register, FLCR
$FE09; break address register high, BRKH
$FE0A; break address register low, BRKL
$FE0B; break status and control register, BRKSCR
$FE0C; LVI status register, LVISR
$FF7E; FLASH block protect register, FLBPR
Data registers are shown in Figure 2-2. Table 2-1 is a list of vector locations.


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