Chapter 3 Memory Mapping Control (S12ZMMCV1)
S12ZVHY/S12ZVHL Family Reference Manual Rev. 1.05
Freescale Semiconductor
125
3.4.2
Illegal Accesses
The S12ZMMC module monitors all memory traffic for illegal accesses. See
for a complete list
of all illegal accesses.
Illegal accesses are reported in several ways:
•
All illegal accesses performed by the S12ZCPU trigger machine exceptions.
•
All illegal accesses performed through the S12ZBDC interface, are captured in the ILLACC bit of
the BDCCSRL register.
Table 3-8. Illegal memory accesses
S12ZCPU
S12ZBDC
ADC
Register
space
Read access
ok
ok
illegal access
Write access
ok
ok
illegal access
Code execution
illegal access
RAM
Read access
ok
ok
ok
Write access
ok
ok
ok
Code execution
ok
EEPROM
Read access
ok
(1)
1. Unsupported NVM accesses during NVM command execution (“collisions”), are treated as illegal accesses.
ok
1
ok
1
Write access
illegal access
illegal access
illegal access
Code execution
ok
1
Reserved
Space
Read access
ok
ok
illegal access
Write access
only permitted in SS mode
ok
illegal access
Code execution
illegal access
Reserved
Read-only
Space
Read access
ok
ok
illegal access
Write access
illegal access
illegal access
illegal access
Code execution
illegal access
NVM IFR
Read access
ok
1
ok
1
illegal access
Write access
illegal access
illegal access
illegal access
Code execution
illegal access
Program NVM
Read access
ok
1
ok
1
ok
1
Write access
illegal access
illegal access
illegal access
Code execution
ok
1
Unmapped
Space
Read access
illegal access
illegal access
illegal access
Write access
illegal access
illegal access
illegal access
Code execution
illegal access
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Страница 788: ...Appendix A MCU Electrical Specifications S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 788 Freescale Semiconductor...
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Страница 822: ...Appendix L SPI Electrical Specifications S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 822 Freescale Semiconductor...
Страница 826: ...Appendix M LINPHY Electrical Specifications S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 826 Freescale Semiconductor...
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