NuMicro® NUC029LEE/NUC029SEE
32-bit Arm
®
Cortex
®
-M0 Microcontroller
Aug, 2018
Page
108
of
497
Rev 1.00
N
U
MICRO
®
N
UC02
9L
E
E
/N
UC029
S
E
E
T
E
CHN
ICA
L R
E
F
E
R
E
NC
E
M
A
NU
A
L
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]
PENDSTCLR
SysTick Exception Clear-Pending Bit
Write Operation:
0 = No effect.
1 = Removes the pending state from the SysTick exception.
This is a write only bit. When you want to clear
PENDST bit, you must “write 0 to
PENDSTSET and write 1 to PENDSTCLR” at the same time.
[24]
Reserved
Reserved.
[23]
ISRPREEMPT
If Set, A Pending Exception Will Be Serviced On Exit From The Debug Halt State
This bit is read only.
[22]
ISRPENDING
Interrupt Pending Flag, Excluding NMI And Faults:
0 = Interrupt not pending.
1 = Interrupt pending.
This bit is read only.
[21:18]
Reserved
Reserved.
[17:12]
VECTPENDING
Indicates The Exception Number Of The Highest Priority Pending Enabled
Exception:
0 = No pending exceptions.
Non-zero = Exception number of the highest priority pending enabled exception.
[11:6]
Reserved
Reserved.
[5:0]
VECTACTIVE
Contains The Active Exception Number
0 = Thread mode.
Non-zero = Exception number of the currently active exception.