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ColdFire Flash Module (CFM)
MCF52211 ColdFire® Integrated Microcontroller Reference Manual, Rev. 2
Freescale Semiconductor 18-13
18.3.3.6 CFMDACC — CFM Data Access Register
The CFMDACC register is used to control data/instruction access to the flash memory.
Figure 18-10. CFM Data Access Register (CFMDACC)
All CFMDACC register bits are readable and only writable when LOCK=0.
To change the flash data access on a temporary basis, the CFMDACC register should be written after the
LOCK bit in the CFMMCR register has been cleared. To change the flash data access loaded during the
reset sequence, the flash logical sector containing the flash configuration field must first be unprotected,
and then the flash data access bytes must be programmed with the desired value. Each flash logical sector
may be mapped into data or both data and instruction address space (see Figure 18-8 for details on flash
sector mapping).
18.3.3.7 CFMUSTAT — CFM User Status Register
The CFMUSTAT register defines the flash command controller status and flash memory access, protection
and verify status.
Figure 18-11. CFM User Status Register (CFMUSTAT)
IPSBAR
Offset: 0x1D_0018 (CFMDACC)
Access: User read/write
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
R
DACC
W
Reset F
1
1
Reset state loaded from flash configuration field during reset.
F
1
F
1
F
1
F
1
F
1
F
1
F
1
F
1
F
1
F
1
F
1
F
1
F
1
F
1
F
1
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
R
DACC
W
Reset F
1
F
1
F
1
F
1
F
1
F
1
F
1
F
1
F
1
F
1
F
1
F
1
F
1
F
1
F
1
F
1
Table 18-10. CFMDACC Field Descriptions
Field Description
31 - 0
DACC
Flash memory address space assignment for data/instruction access
DACC[M] = 1: Flash logical sector M is placed in data address space.
DACC[M] = 0: Flash logical sector M is placed in data and instruction address space.
IPSBAR
Offset: 0x1D_0020 (CFMUSTAT)
Access: User read/write
76543210
R
CBEIF
CCIF
PVIOL ACCERR
0
BLANK
00
W
Reset:11000000