MPC8544COMEDEV Freescale Semiconductor, MPC8544COMEDEV Datasheet - Page 540

Manufacturer Part Number

MPC8544COMEDEV

KIT DEV EXPRESS MPC8544COM

Manufacturer

Freescale Semiconductor

For Use With/related Products

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Security Engine (SEC) 2.1

12.4.4.11 MDEU Context Registers

For the MDEU, the context consists of the hash plus the message length count. Write access to this register

block allows continuation of a previous hash. Reading these registers provide the resulting message digest

or HMAC, along with an aggregate bit count.

After a power-on reset, all the MDEU context register values are cleared to 0.

MDEU context registers are initialized if the INIT bit is set in the MDEU mode register.

Address MDEU 0x3_6050

MPC8544E PowerQUICC III Integrated Host Processor Family Reference Manual, Rev. 1

SHA-1and SHA-256 are big endian. MD5 is little endian. The MDEU

module internally reverses the endianness of the five registers A, B, C, D,

and E upon writing to or reading from the MDEU context if the MDEU

mode register indicates MD5 is the hash of choice. Most other endian

considerations are performed as 8-byte swaps. In this case, 4-byte

endianness swapping is performed within the A, B, C, D, and E fields as

individual registers. Reading this memory location while the module is not

done will generate an error interrupt.

Figure 12-38. MDEU EU Go Register

Figure 12-39

Freescale Semiconductor

Access: Write-only

shows how the