Section 18.3.3.5, “cfmsacc, Cfm supervisor access register, 5 cfmsacc — cfm supervisor access register – Freescale Semiconductor ColdFire MCF52210 User Manual
Page 302
ColdFire Flash Module (CFM)
MCF52211 ColdFire® Integrated Microcontroller Reference Manual, Rev. 2
18-12
Freescale Semiconductor
18.3.3.5
CFMSACC — CFM Supervisor Access Register
The CFMSACC register is used to control supervisor/user access to the flash memory.
Figure 18-9. CFM Supervisor Access Register (CFMSACC)
All CFMSACC register bits are readable and only writable when LOCK equals 0.
To change the flash supervisor access on a temporary basis, the CFMSACC register should be written after
the LOCK bit in the CFMMCR register has been cleared. To change the flash supervisor access loaded
during the reset sequence, the flash logical sector containing the flash configuration field must first be
unprotected, and then the flash supervisor access bytes must be programmed with the desired value. Each
flash logical sector may be mapped into supervisor or unrestricted address space (see
<f-helvetica><st-bold>Figure 18-8. for details on flash sector mapping).
IPSBAR
Offset: 0x1D_0014 (CFMSACC)
Access: User read/write
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
R
SUPV
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
SUPV
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 18-9.
Field
Description
31 - 0
SUPV
Flash address space assignment for supervisor/user access
SUPV[M] = 1: Flash logical sector M is placed in supervisor address space.
SUPV[M] = 0: Flash logical sector M is placed in unrestricted address space.