ISD94100 Series Technical Reference Manual
Sep 9, 2019
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[26]
PENDSTSET
SysTick Exception Set-pending Bit
Write Operation:
0 = No effect.
1 = Changes SysTick exception state to pending.
Read Operation:
0 = SysTick exception is not pending.
1 = SysTick exception is pending.
[25]
PENDSTRTC_CA
L
SysTick Exception Clear-pending Bit
Write Operation:
0 = No effect.
1 = Removes the pending state from the SysTick exception.
Note:
This is a write only bit. To clear the PENDST bit, you must “write 0 to PENDSTSET
and write 1 to PENDSTRTC_CAL” at the same time.
[24]
Reserved
Reserved. Any values read should be ignored. When writing to this field always write with
reset value.
[23]
ISRPREEMPT
Interrupt Preempt Bit (Read Only)
If set, a pending exception will be serviced on exit from the debug halt state.
[22]
ISRPENDING
Interrupt Pending Flag, Excluding NMI and Faults (Read Only)
0 = Interrupt not pending.
1 = Interrupt pending.
[21:18]
Reserved
Reserved. Any values read should be ignored. When writing to this field always write with
reset value.
[17:12]
VECTPENDING
Number of the Highest Pended Exception
Indicate the Exception Number of the Highest Priority Pending Enabled Exception
0 = no pending exceptions.
Nonzero = the exception number of the highest priority pending enabled exception.
The value indicated by this field includes the effect of the BASEPRI and FAULTMASK
registers, but not any effect of the PRIMASK register.
[11]
RETTOBASE
Preempted Active Exceptions Indicator
Indicate whether There are Preempted Active Exceptions
0 = there are preempted active exceptions to execute.
1 = there are no active exceptions, or the currently-executing exception is the only active
exception.
[10:7]
Reserved
Reserved. Any values read should be ignored. When writing to this field always write with
reset value.
[6:0]
VECTACTIVE
Number of the Current Active Exception
0 = Thread mode.
Non-zero = The exception number of the currently active exception.
