
MOTOROLA
Chapter 21. CDR3 Flash (UC3F) EEPROM
21-33
UC3F Operation
While the device remains in the uncensored mode, ACCESS may be set to allow the device
to enter censored mode and still access the UC3F array. ACCESS may not be set while the
device is in censored mode but may be cleared.
.
The only way CENSOR[0:1] can be changed is by setting or clearing the FLASH NVM
fuses. In the information censorship state, CENSOR[0:1] must be cleared to the cleared
censorship state before CENSOR[0:1] can be put into the no censorship state. While
clearing CENSOR[0:1] the entire UC3F array is erased. Thus the information stored in the
UC3F array is made invalid while clearing CENSOR[0:1].
Table 21-10. Censorship Modes and Censorship Status
Mode
Censored
Uncensored
ACCESS
0
1
0
1
FIC
0
1
0
1
0101
CENSOR[0:1]
00
01
or
10
11
00,
01,
or
10
11
00, 01, 10 or 11
UC3F EEPROM Status
#1
#2
#3
#4
#5
#6
#7
#8
#9
#10
#11
Indicates that the UC3F array cannot be accessed.
1.
ACCESS cannot be changed. FIC can be set. UC3F array cannot be accessed.
CENSOR[0:1] can be set. CENSOR[0:1] cannot be cleared.
2.
ACCESS cannot be changed. FIC can be set. UC3F array can be accessed.
CENSOR[0:1] can be set. CENSOR[0:1] can be cleared.
3.
ACCESS cannot be changed. FIC can be set. UC3F array cannot be accessed.
CENSOR[0:1] cannot be cleared unless IWS = 1.
4.
ACCESS cannot be changed. FIC cannot be changed. UC3F array cannot be
accessed. CENSOR[0:1] can be set. CENSOR[0:1] cannot be cleared unless IWS = 1.
5.
ACCESS cannot be changed. FIC cannot be changed. UC3F array cannot be
accessed. CENSOR[0:1] cannot be cleared unless IWS = 1.
6.
ACCESS can be cleared. FIC can be set. UC3F array can be accessed. CENSOR[0:1]
can be changed.
7.
ACCESS can be cleared. FIC cannot be changed. UC3F array can be accessed.
CENSOR[0:1] can be changed.
8.
ACCESS can be changed. FIC can be set. UC3F array can be accessed.
CENSOR[0:1] can be changed.
9.
ACCESS can be changed. FIC cannot be changed. UC3F array can be accessed.
CENSOR[0:1] cannot be changed unless IWS = 1.
10.
ACCESS can be changed. FIC can be set. UC3F array can be accessed.
CENSOR[0:1] can be changed.
11.
ACCESS can be changed. FIC cannot be changed. UC3F array can be accessed.
CENSOR[0:1] can be changed.