MPC5604B/C Microcontroller Reference Manual, Rev. 8
742 Freescale Semiconductor
29.3 Modes of operation
The Register Protection module is operable when the module under protection is operable.
29.4 External signal description
There are no external signals.
29.5 Memory map and register description
This section provides a detailed description of the memory map of a module using the Register Protection.
The original 16 KB module memory space is divided into five areas as shown in Figure 29-2.
Figure 29-2. Register protection memory diagram
Area 1 spans 6 KB and holds the normal functional module registers and is transparent for all read/write
operations.
Area 2 spans 2 KB starting at address 0x1800. It is a reserved area, which cannot be accessed.
Area 3 spans 6 KB, starting at address 0x2000 and is a mirror of area 1. A read/write access to a 0x2000+X
address will reads/writes the register at address X. As a side effect, a write access to address 0x2000+X
sets the optional soft lock bits for address X in the same cycle as the register at address X is written. Not
all registers in area 1 need to have protection defined by associated soft lock bits. For unprotected registers
module register space
Base + 0x0000
6KB
2 KB Reserved
mirror module register space
6KB
1.5 KB Lock Bits
with user defined
Base + 0x1800
Base + 0x2000
Base + 0x3800
soft locking function
512 B Configuration
Base + 0x3E00
Base + 0x3FFF
Area 1
Area 2
Area 3
Area 4
Area 5
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