RANDOM_NUMBER

ONLINE_TEST_CFG

ONLINE_TEST_VAL

ENTROPY_INJECT

MISC_CFG

ENCRYPTED_NUMBER

COUNTER_VAL

COUNTER_CFG

POWERDOWN

MODULEID

RANDOM_NUMBER : This register contains a random 32 bit number which is computed on demand, at each time it is read.
bits : 0 - 31 (32 bit)
access : read-only

ACTIVATE : 0: disabled 1: activated Update rythm for VAL depends on COUNTER_CFG if data_sel is set to COUNTER.
bits : 0 - 0 (1 bit)
access : read-write

DATA_SEL : Selects source on which to apply online test: 00: LSB of COUNTER: raw data from one or all sources of entropy 01: MSB of COUNTER: raw data from one or all sources of entropy 10: RANDOM_NUMBER 11: ENCRYPTED_NUMBER 'activate' should be set to 'disabled' before changing this field.
bits : 1 - 2 (2 bit)
access : read-write

LIVE_CHI_SQUARED : This value is updated as described in field 'activate'.
bits : 0 - 3 (4 bit)
access : read-only

MIN_CHI_SQUARED : This field is reset when 'activate'==0.
bits : 4 - 7 (4 bit)
access : read-only

MAX_CHI_SQUARED : This field is reset when 'activate'==0.
bits : 8 - 11 (4 bit)
access : read-only

ENTROPY : Use this register to inject or restore entropy 32 bits at a time. Writing is blocking thus see to it to have analog clocks activated. Injection can be usefull to add contribution from an external source of entropy, like for example LSBs of an ADC or of a temperature sensor. Restore can be usefull to store N random numbers in central memory before going powerdown then restore this entropy to RNG IP after power-up. It is useless to inject or restore more than 1*(number of RNGs) 32b words consecutively. Recommendation is to inject 1*(number of RNGs) words, and possibly later (2*32 clock cycles of slowest analog clock) inject again 1*(number of RNGs) words. Then maximum capacity of restoration is reached: about 44 bits per RNG (not to be mistaken with maximum capacity of entropy accumulation which is about 100 bits per RNG). You can inject less than 32 bits words (let unused bits to 0). Injection cannot degrade overall performance due to the fact that some internal PRNGs are excluded on purpose from this external action.
bits : 0 - 31 (32 bit)
access : read-write

AES_RESEED : If set, ENCRYPTED_NUMBER generation becomes predictable, provided all secrets and current internal state are known: independant from entropy source.
bits : 0 - 0 (1 bit)
access : read-write

AES_DT_CFG : Set this bit to re-seed AES.
bits : 1 - 1 (1 bit)
access : read-write

ENCRYPTED_NUMBER : This register contains a random 32 bit number which is pre-computed.
bits : 0 - 31 (32 bit)
access : read-write

CLK_RATIO : Gives the ratio between the internal clocks frequencies and the register clock frequency for evaluation and certification purposes.
bits : 0 - 7 (8 bit)
access : read-only

REFRESH_CNT : Incremented (till max possible value) each time COUNTER was updated since last reading to any *_NUMBER.
bits : 8 - 21 (14 bit)
access : read-only

MODE : 00: disabled 01: update once.
bits : 0 - 1 (2 bit)
access : read-write

CLOCK_SEL : Selects the internal clock on which to compute statistics.
bits : 2 - 4 (3 bit)
access : read-write

SHIFT4X : To be used to add precision to clock_ratio and determine 'entropy refill'.
bits : 5 - 7 (3 bit)
access : read-write

SOFT_RESET : Request softreset that will go low automaticaly after acknowledge from CORE.
bits : 0 - 0 (1 bit)
access : read-write

FORCE_SOFT_RESET : When used with softreset it forces CORE_RESETN to low on acknowledge from CORE.
bits : 1 - 1 (1 bit)
access : read-write

POWERDOWN : When set all accesses to standard registers are blocked.
bits : 31 - 31 (1 bit)
access : read-write

APERTURE : Aperture i.
bits : 0 - 7 (8 bit)
access : read-only

MIN_REV : Minor revision i.
bits : 8 - 11 (4 bit)
access : read-only

MAJ_REV : Major revision i.
bits : 12 - 15 (4 bit)
access : read-only

ID : Identifier.
bits : 16 - 31 (16 bit)
access : read-only