MPC8544COMEDEV Freescale Semiconductor, MPC8544COMEDEV Datasheet - Page 514

• Manufacturer Part Number: MPC8544COMEDEV
• Description: KIT DEV EXPRESS MPC8544COM
• Manufacturer: Freescale Semiconductor
• Type: MPUr

Specifications of MPC8544COMEDEV

• Contents: Board
• For Use With/related Products: MPC8544
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Security Engine (SEC) 2.1
Table 12-15
12.4.2.2
This value indicates the number of bytes of key memory that should be used in encrypting or decrypting.
If the DEU mode register is set for single DES, any value other than 8 bytes will automatically generate a
key size error in the DEU interrupt status register. If the mode bit is set for triple DES, any value other than
16 bytes (112 bits for 2-key triple DES (K1=K3) or 24 bytes (168 bits for 3-key triple DES) will generate
an error. Triple DES always uses K1 to encrypt, Key2 to decrypt, K3 to encrypt.
Table 12-16
12-34
Offset DEU 0x3_2008
The following bits are described for information only. They are not under direct user control.
The following bits are controlled through the MODE0 field of the descriptor header.
Reset
56–60
0–54
52–63
Bits
0–51
Bits
55
61
62
63
W
R
0
Name
CE
ED
TS
—
—
—
Key Size
Name
describes the DEU mode register fields.
shows the legal values for DEU key size.
Reserved
Reserved
Reserved
CBC/ECB. If set, DEU operates in cipher-block-chaining mode. If not set, DEU operates in electronic codebook
mode.
0 ECB mode
1 CBC mode
Triple/single DES. If set, DEU operates the triple DES algorithm; if not set, DEU operates the single DES
algorithm.
0 Single DES
1 Triple DES
Encrypt/decrypt. If set, DEU operates the encryption algorithm; if not set, DEU operates the decryption
algorithm.
0 Perform decryption
1 Perform encryption
DEU Key Size Register (DEUKSR)
—
MPC8544E PowerQUICC III Integrated Host Processor Family Reference Manual, Rev. 1
Reserved
8 bytes = 0x08 (only legal value if mode is single DES.)
16 bytes= 0x10 (for 2 key 3DES, K1 = K3)
24 bytes= 0x18 (for 3 key 3DES)
Table 12-16. DEU Key Size Register Field Descriptions
Table 12-15. DEU Mode Register Field Descriptions
Figure 12-14. DEU Key Size Register
—
All zeros
Description
Description
51 52
Freescale Semiconductor
Access: Read/Write
KEY SIZE
63