MPC8544COMEDEV Freescale Semiconductor, MPC8544COMEDEV Datasheet - Page 570

• 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
12.4.7.15 KEU Key Data Registers _3 and _4 (Integrity Key) (KEUKD n )
The KEU key data registers_3 & _4 together hold one 128-bit key that is used for F9 message
authentication. KEU key data register_3, (IK-high), holds the first 8 bytes (1-8). KEU key data register_4,
(IK-low), holds the second 8 bytes (9-16). The KEU key data registers must be written before message
processing begins and cannot be written while the block is processing data, or a context error will occur.
If the F9 only mode is set, the integrity key data may be optionally written to KEU key data registers_1 &
_2. This eliminates the need for the host to offset from the base key address to write to KEU key data
registers_3 & _4 while using the KEU exclusively for the F9 integrity function.
Reading from either of these registers will result in an address error being reflected in the KEU interrupt
status register.
12.4.7.16 KEU FIFOs
The KEU fetches data 64 bits at a time from the KEU input FIFO. During F8 processing, the input data is
XORed with the generated keystream and the results are placed in the KEU output FIFO. During F9
12-90
Address KEU 0x3_E408
Address KEU 0x3_E400
Address KEU 0x3_E410
Address KEU 0x3_E418
Reset
Reset
Reset
Reset
W
W
R
R
W
W
R
R
0
0
0
0
MPC8544E PowerQUICC III Integrated Host Processor Family Reference Manual, Rev. 1
Figure 12-68. KEU Key Data Register_1 (CK-high)
Figure 12-69. KEU Key Data Register_2 (CK-Low)
Figure 12-70. KEU Key Data Register_3 (IK-high)
Figure 12-71. KEU Key Data Register_4 (IK-low)
KEU Key Data Register _1 (CK-high)
KEU Key Data Register _2 (CK-low)
KEU Key Data Register _3 (IK-high)
KEU Key Data Register _4 (IK-low)
All zeros
All zeros
All zeros
All zeros
Freescale Semiconductor
Access: Read/write
Access: Read/write
Access: Read/write
Access: Read/write
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