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S9S12XS256J0CAL Datasheet, PDF (145/738 Pages) Freescale Semiconductor, Inc – Microcontrollers | |||
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Memory Mapping Control (S12XMMCV4)
In single-chip modes accesses by the CPU (except for ï¬rmware commands) to any of the unimplemented
areas (see Figure 3-19) will result in an illegal access reset (system reset) in case of no MPU error. BDM
accesses to the unimplemented areas are allowed but the data will be undeï¬ned.No misaligned word access
from the BDM module will occur; these accesses are blocked in the BDM module (Refer to BDM Block
Guide).
Misaligned word access to the last location of RAM is performed but the data will be undeï¬ned.
Misaligned word access to the last location of any global page (64KB) by any global instruction, is
performed by accessing the last byte of the page and the ï¬rst byte of the same page, considering the above
mentioned misaligned access cases.
S12XS Family Reference Manual, Rev. 1.13
Freescale Semiconductor
145
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