Samsung S5PC110 Manual page 1999

S5PC110_UM
2.3.2.33 PKA Control (PKA_SFR1, R/W, Address = 0xEA00_7004)
PKA_SFR1
EXEC_ON
Reserved
(note)
PLDM_ON
NOTE: If PLDM_ON is set to '1', PKA loads modulus M's least significant chunk data from memory to PKA's internal register
at the initial time of multiplication. For the whole modular exponentiation, only the first modular multiplication needs to
pre-load the least significant chunk of modulus M. When PKA performs a number of modular multiplications except
the first one, the least significant chunk of modulus M is pre-loaded during the previous modular multiplication. When
PLDM_ON is '0', the processing time for a multiplication becomes shorter. The saved clock cycles after setting
PLDM_ON to '0' is c/32 + 5.
Bit
[0] Controls and monitors the execution of PKA
0 = PKA stays in idle state [Default]
1 = PKA starts to run and continues running
[2:1] -
[3] Controls the pre-loading of the least significant chunk of
modulus M
0 = Does not pre-load the least significant chunk of
modulus M [Default]
1 = Pre-loads the least significant chunk of modulus M
Description
2 ADVANCED CRYPTO ENGINE
R/W Initial State
0
-
0
2-44