mc9s12xf512 Freescale Semiconductor, Inc, mc9s12xf512 Datasheet - Page 803

• Manufacturer Part Number: mc9s12xf512
• Description: S12x Microcontrollers 16-bit Automotive Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

17.1.3
17.1.4
The MPU module can be used in all MCU modes.
17.2
The MPU module has no external signals.
17.3
This section provides a detailed description of address space and registers used by the MPU module.
1. Master 3 can be implemented or left out depending the chip configuration. Please refer to the SoC guide for information about
the availability and function of Master 3.
2. The MPU address range is a configuration option defined at SoC level. Please refer to the MCU top-level chapter for details.
3. The MPU descriptor granularity is a configuration option defined at SoC level. Please refer to the MCU top-level chapter for
details.
Freescale Semiconductor
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Protects memory from undesired accesses coming from up to 3 bus masters
Four memory protection descriptors
— each descriptor can cover the full MPU address range
— the minimum granularity for each descriptor is 8 Bytes
Each descriptor can be configured to allow one of four types of access privilege for the defined
memory region
— Bus master has full access (read, write and execute enabled)
— Bus master can read and execute (write illegal)
— Bus master can read and write (execution illegal)
— Bus master can only read (write and execution illegal)
Accesses to memory in the MPU address range
will cause an access violation
External Signal Description
Memory Map and Register Definition
8 MBytes)
Features
Modes of Operation
MC9S12XF - Family Reference Manual, Rev.1.19
2
which are not covered by any protection descriptor
2
Chapter 17 Memory Protection Unit (S12XMPUV2)
3
in the global memory map (up to
1
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