MPC180LMB Freescale Semiconductor, MPC180LMB Datasheet - Page 81

• 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: -

7.5 Miscellaneous Routines
The remaining routines are general in nature and are not specific to any particular
cryptographic algorithm.
7.5.1 Clear Memory
This routine clears all of the RAM memory locations in the PKEU. This includes the A, B,
and N RAMs. All locations are set to zero. All other registers are cleared either via a reset
(software or hardware) or by explicitly writing zeros to each register. Following a reset
(software or hardware), this routine is automatically invoked. This accounts for the majority
of time between reset and the assertion of the DONE bit in the status register.
Computation
Entry name
Entry address
Pre-conditions
Post-conditions A = B = N = 0 (all locations)
Special
conditions
A, B, N, and t memories are overwritten with zeros
clearmemory
0x00d(r2)
—
Unless explicitly noted, all other registers are not guaranteed to be any particular value.
—
Initial Condition
Figure 7-22. Clear Memory Register Usage
Freescale Semiconductor, Inc.
For More Information On This Product,
Chapter 7. Public Key Execution Unit
Table 7-23. Clear Memory
Go to: www.freescale.com
EXP(k)_SIZE
Modsize
regAsel
regBsel
regNsel
EXP(k)
XYZ
F2M
N3
N2
N1
N0
B3
B2
B1
B0
A3
A2
A1
A0
Clear Memory
0
0
0
0
0
0
0
0
0
0
0
0
same
same
same
same
same
same
same
same
Final Condition
Miscellaneous Routines
7-31