NXP Semiconductors K22F series - Page 756

RNG_SR field descriptions (continued)
Field Description
7–5
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
4
SLP
Sleep
Specifies whether RNGA is in Sleep or Normal mode.
NOTE:
You can also enter Sleep mode by asserting the DOZE signal.
0 Normal mode
1 Sleep (low-power) mode
3
ERRI
Error Interrupt
Indicates whether an OR underflow condition has occurred since you last cleared the error interrupt
(CR[CLRI]) or RNGA was reset, regardless of whether the error interrupt is masked (CR[INTM]).
An OR underflow condition occurs when you read OR[RANDOUT] and SR[OREG_LVL]=0.
NOTE:
After you reset the error-interrupt indicator (via CR[CLRI]), RNGA writes 0 to this field.
0 No underflow
1 Underflow
2
ORU
Output Register Underflow
Indicates whether an OR underflow condition has occurred since you last read this register (SR) or RNGA
was reset, regardless of whether the error interrupt is masked (CR[INTM]).
An OR underflow condition occurs when you read OR[RANDOUT] and SR[OREG_LVL]=0.
NOTE:
After you read this register, RNGA writes 0 to this field.
0 No underflow
1 Underflow
1
LRS
Last Read Status
Indicates whether the most recent read of OR[RANDOUT] caused an OR underflow condition, regardless
of whether the error interrupt is masked (CR[INTM]).
An OR underflow condition occurs when you read OR[RANDOUT] and SR[OREG_LVL]=0.
NOTE:
After you read this register, RNGA writes 0 to this field.
0 No underflow
1 Underflow
0
SECV
Security Violation
Used only when high assurance is enabled (CR[HA]). Indicates that a security violation has occurred.
NOTE:
This field is sticky. To clear SR[SECV], you must reset RNGA.
0 No security violation
1 Security violation
Memory map and register definition
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
756 NXP Semiconductors