MSC8144E Reference Manual, Rev. 3
26-124
Freescale
Semiconductor
Security Engine (SEC)
26.5.8 AESU Registers
26.5.8.1 AESU Mode Register (AESUMR)
The AESU Mode Register contains 7 bit fields that are used to program the AESU. The Mode
Register is cleared when the AESU is reset or reinitialized. Setting a reserved mode bit generates
a data error. If the Mode Register is modified during processing, a context error is generated.
Table 26-40 describes AESU Mode Register fields.
Note:
The lowest 8 bits in this register are controlled by the MODE0 field in the descriptor
header.
AESUMR
AESU Mode Register
Offset 0xC4000
Bits
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
Field
—
Type
R/W
Reset 0x0000
Bits
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
Field
—
Type
R/W
Reset
0x0000
Bits 31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
Field
—
Type
R/W
Reset 0x0000
Bits
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Field
—
SCM
—
ECM
FN
IM
RDK
CM
ED
Type
R/W
Reset 0x0000
Table 26-40. AESUMR Field Descriptions
Name
Reset
Description
Settings
—
63–13
0
Reserved. Write to zero for future compatibility.
SCM
12
0
Sub-Cipher Mode
Specifies the number of sources to be XORd
together for specific cipher modes.
Note:
This field is included for information
purposes only. It is not under direct user
control.
XOR Cipher Mode:
2 and 3 are valid. All other values reserved.
Other cipher modes:
0 is valid. All other values reserved.
—
9–8
0
Reserved. Write to zero for future compatibility.
ECM
7–6
0
Extend Cipher Mode
Used in combination with the CM field to define the
AES operating mode.
See Table 26-41 for details.
FM
5
0
Final MAC
Determines whether to process the final message
block and generate the final MAC tag during
end-of-message processing (CCM mode only).
0
Do not generate final MAC tag.
1
Generate final MAC tag after CCM
processing is complete.
Summary of Contents for MSC8144E
Page 1: ...MSC8144E Reference Manual Quad Core Media Signal Processor MSC8144ERM Rev 3 July 2009 ...
Page 48: ...MSC8144E Reference Manual Rev 3 xlviii Freescale Semiconductor ...
Page 86: ...MSC8144E Reference Manual Rev 3 1 38 Freescale Semiconductor Overview ...
Page 168: ...MSC8144E Reference Manual Rev 3 3 60 Freescale Semiconductor External Signals ...
Page 242: ...MSC8144E Reference Manual Rev 3 5 26 Freescale Semiconductor Reset ...
Page 314: ...MSC8144E Reference Manual Rev 3 8 24 Freescale Semiconductor General Configuration Registers ...
Page 414: ...MSC8144E Reference Manual Rev 3 10 14 Freescale Semiconductor MSC8144E SC3400 DSP Subsystem ...
Page 452: ...MSC8144E Reference Manual Rev 3 11 38 Freescale Semiconductor Internal Memory Subsystem ...
Page 520: ...MSC8144E Reference Manual Rev 3 12 68 Freescale Semiconductor DDR SDRAM Memory Controller ...
Page 1070: ...MSC8144E Reference Manual Rev 3 21 28 Freescale Semiconductor Timers ...