CHAPTER 32:Memory Protection Unit for AHB
S6J3200 Series Hardware Manual Document Number: 002-04852 Rev. *G
1181
5.
Notes on Using the MPU AHB
This section is the "Programmer’s Guide", which lists the usage notes for programming the MPU AHB
module. Please read these guidelines before programming the module.
General Usage Notes
−
Reserved bits return undefined values. The software programs shall be independent of the values
read from the reserved register bits
−
The MPU AHB supports storage of information of the first memory protection violation only on the
bus. Therefore, once an NMI interrupt flag is set, further monitoring of the AHB master interface is
stalled until the MPUHn_CTRL0:NMI bit is cleared. This implies that any memory protection
violation occurring on the bus while the MPUHn_CTRL0:NMI is set is simply ignored by the MPU
AHB
Note:
−
Software developers must therefore try to keep the ISR size small so that the NMI interrupt of the
MPU AHB does not remain unattended for long.
Summary of Contents for S6J3200 Series
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