MPC180LMB Freescale Semiconductor, MPC180LMB Datasheet - Page 65

• Manufacturer Part Number: MPC180LMB
• Description: IC SECURITY PROCES 66MHZ 100LQFP
• Manufacturer: Freescale Semiconductor

Specifications of MPC180LMB

• Processor Type: Security Processor
• Speed: 66MHz
• Voltage: 1.8V
• Mounting Type: Surface Mount
• Package / Case: 100-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -

7.3.6 ECC F
The (A
the point add and double routines in completing their functions. For ECC purposes, this
function will rarely be used directly by the host processor. This function operates with a
minimum of five digits (Modsize = 4). The complete set of I/O conditions is shown below:
Computation
Entry name
Entry address
Pre-conditions
Post-conditions
Special
conditions
((A
B
C = A * B * R
number of digits of the modulus vector
modularmultiply
0x00a(modularmultiply)
A0-3 = A (integer, exact A-location pre-selected in Control Register)
B0-3 = B (integer, exact B-location pre-selected in Control Register)
N0-3 = prime p (modulus) of the ECC system
A0-3 = A operand is preserved
B0-3 = results of modular multiplication stored where the B operand was located
Unless explicitly noted, all other registers are not guaranteed to be any particular value.
Typically, though it is not mandatory, the operands will be in the Montgomery residue system. The
only time this would not be the case is when manually placing a value into the Montgomery residue
system.
R
-1
B
modulus N (if N0 selected)
) mod N calculation is the core function of the PKEU. It is used to assist
Figure 7-9. Modular Multiplication Register Usage
p
Initial Condition
Montgomery Modular Multiplication
R
B (if B0 selected)
A (if A0 selected)
Freescale Semiconductor, Inc.
-1
-1
mod N, where A, B, and C are integers less than N and R = 2
For More Information On This Product,
) mod N)
Table 7-10. Modular Multiplication
set (00, 01, 10, 11)
set (00, 01, 10, 11)
set (00, 01, 10, 11)
Chapter 7. Public Key Execution Unit
‘1’ - ECC enabled
‘0’ - F
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p
enabled
set
EXP(k)_SIZE
Modsize
regNsel
regAsel
regBsel
EXP(k)
XYZ
F2M
ECC
B3
B2
B1
B0
A3
A2
A1
A0
N3
N2
N1
N0
Modular Multiply
same
same
same
same
same
?
?
?
C (if B0 selected)
?
?
?
modulus N (if N0 selected)
Final Condition
A (if A0 selected)
same
16D
where D is the
ECC Routines
7-15