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10.2.1.15 KEYREADAREA Register (Offset = 40Ch) [reset = X]
KEYREADAREA is shown in Figure 10-17 and described in Table 10-25.
Key Read Area
Figure 10-17. KEYREADAREA Register
31 30 29 28 27 26 25 24
BUSY RESERVED
R-X R/W-X
23 22 21 20 19 18 17 16
RESERVED
R/W-X
15 14 13 12 11 10 9 8
RESERVED
R/W-X
7 6 5 4 3 2 1 0
RESERVED RAM_AREA
R/W-X R/W-8h
Table 10-25. KEYREADAREA Register Field Descriptions
Bit Field Type Reset Description
31 BUSY R X
Key store operation busy status flag (read only) 0: operation is
completed. 1: operation is not completed and the key store is busy.
30-4 RESERVED R/W X
Software should not rely on the value of a reserved. Writing any
other value than the reset value may result in undefined behavior.
3-0 RAM_AREA R/W 8h
Selects the area of the key store RAM from where the key needs to
be read that will be written to the AES engine. Only RAM areas that
contain valid written keys can be selected.
0h = RAM Area 0
1h = RAM Area 1
2h = RAM Area 2
3h = RAM Area 3
4h = RAM Area 4
5h = RAM Area 5
6h = RAM Area 6
7h = RAM Area 7
8h = No RAM
840
SWCU117A–February 2015–Revised March 2015
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