mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 593

• Manufacturer Part Number: mcf51jf128
• Description: Mcf51jf128 Reference Manual
• Manufacturer: Freescale Semiconductor, Inc

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26.5.2 Accumulator (CAU_CAA)
Commands use the CAU accumulator for storage of results and as an operand for the
cryptographic algorithms.
Address: CAU_CAA is 0h base + 1h offset = 0000_0001h
Freescale Semiconductor, Inc.
Bit
W
R
Reserved
31
0
27–2
31–0
Field
DPE
Field
ACC
IC
30
1
0
0
29
0
28
0
0x1
0x2
This read-only bitfield is reserved and always has the value zero.
Reserved, must be cleared.
DES parity error
Indicates whether the DES parity error is detected.
0
1
Illegal command
Indicates an illegal instruction has been executed.
0
1
Accumulator
Stores results of various CAU commands.
27
0
No error detected.
DES key parity error detected.
No illegal commands issued.
Illegal command issued.
26
0
Initial CAU version.
Second version, added support for SHA-256 algorithm.(This is the value on this device)
25
0
24
0
CAU_CASR field descriptions (continued)
MCF51JF128 Reference Manual, Rev. 2, 03/2011
23
0
22
0
CAU_CAA field descriptions
21
0
20
0
19
0
18
0
Preliminary
17
0
16
0
ACC
15
0
Description
Description
14
0
Chapter 26 Cryptographic Acceleration Unit (CAU)
13
0
12
0
11
0
10
0
0
9
0
8
0
7
0
6
0
5
4
0
0
3
0
2
0
1
593
0
0