NXP Semiconductors K22F series - RNGA Status Register (RNG_SR)

33.3.2 RNGA Status Register (RNG_SR)
Indicates the status of RNGA. This register is read-only.
Address: 4002_9000h base + 4h offset = 4002_9004h
Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
R
0 OREG_SIZE
W
Reset
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
Bit
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
R
OREG_LVL 0 SLP
ERRI
ORU
LRS
SECV
W
Reset
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
RNG_SR field descriptions
Field Description
31–24
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
23–16
OREG_SIZE
Output Register Size
Indicates the size of the Output (OR) register in terms of the number of 32-bit random-data words it can
hold.
1 One word (this value is fixed)
15–8
OREG_LVL
Output Register Level
Indicates the number of random-data words that are in OR[RANDOUT], which indicates whether
OR[RANDOUT] is valid.
NOTE:
If you read OR[RANDOUT] when SR[OREG_LVL] is not 0, then the contents of a random number
contained in OR[RANDOUT] are returned, and RNGA writes 0 to both OR[RANDOUT] and
SR[OREG_LVL].
0 No words (empty)
1 One word (valid)
Table continues on the next page...
Chapter 33 Random Number Generator Accelerator (RNGA)
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
NXP Semiconductors 755