Freescale Semiconductor MPC5604B - Access Errors

MPC5604B/C Microcontroller Reference Manual, Rev. 8
750 Freescale Semiconductor
29.6.3 Access errors
The protection module generates transfer errors under several circumstances. For the area definition refer
to Figure 29-2.
1. If accessing area #1 or area #3, the protection module transfers any access error from the
underlying Module under Protection.
2. If user mode is not allowed, user write attempts to all areas will assert a transfer error and the writes
will be blocked.
3. Access attempts to the reserved area #2 cause a transfer error to be asserted.
4. Access attempts to unimplemented 32-bit registers in area #4 or area #5 cause a transfer error to be
asserted.
5. Attempted writes to a register in area #1 or area #3 with soft lock bit set for any of the affected
bytes causes a transfer error to be asserted and the write is blocked. The complete write operation
to non-protected bytes in this word is ignored.
6. If writing to a soft lock register in area #4 with the hard lock bit being set a transfer error is asserted.
7. Any write operation in any access mode to area #3 while GCR.HLB is set result in a error.
29.7 Reset
The reset state of each individual bit is shown within the Register Description section (See Section 29.5.2,
Register description). In summary, after reset, locking for all MRn registers is disabled. The registers can
be accessed in Supervisor Mode only.
29.8 Protected registers
For MPC5604B the Register Protection module protects the registers shown in Table 29-5.
Table 29-5. Protected registers
Module Register
Protected
size (bits)
Module base
address
Register
offset
Protected
bits
Code flash memory , 4 registers to protect
Code Flash MCR 32 C3F88000 000 bits[0:31]
Code Flash PFCR0 32 C3F88000 01C bits[0:31]
Code Flash PFCR1 32 C3F88000 020 bits[0:31]
Code Flash PFAPR 32 C3F88000 024 bits[0:31]
Data flash memory, 1 register to protect
Data Flash MCR 32 C3F8C000 000 bits[0:31]
SIU lite, 64 registers to protect
SIUL IRER 32 C3F90000 018 bits[0:31]
SIUL IREER 32 C3F90000 028 bits[0:31]