Datasheet

UM10398 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2014. All rights reserved.
User manual Rev. 12.3 — 10 June 2014 512 of 547
NXP Semiconductors
UM10398
Chapter 28: LPC111x/LPC11Cxx Appendix: ARM Cortex-M0 reference
– whether any interrupts are pending.
See the register summary in Table 28–449
for the ICSR attributes. The bit assignments
are:
Table 451. ICSR bit assignments
Bits Name Type Function
[31] NMIPENDSET
[2]
RW NMI set-pending bit.
Write:
0 = no effect
1 = changes NMI exception state to pending.
Read:
0 = NMI exception is not pending
1 = NMI exception is pending.
Because NMI is the highest-priority exception, normally
the processor enters the NMI exception handler as soon
as it detects a write of 1 to this bit. Entering the handler
then clears this bit to 0. This means a read of this bit by
the NMI exception handler returns 1 only if the NMI
signal is reasserted while the processor is executing that
handler.
[30:29] - - Reserved.
[28] PENDSVSET RW PendSV set-pending bit.
Write:
0 = no effect
1 = changes PendSV exception state to pending.
Read:
0 = PendSV exception is not pending
1 = PendSV exception is pending.
Writing 1 to this bit is the only way to set the PendSV
exception state to pending.
[27] PENDSVCLR WO PendSV clear-pending bit.
Write:
0 = no effect
1 = removes the pending state from the PendSV
exception.
[26] PENDSTSET RW SysTick exception set-pending bit.
Write:
0 = no effect
1 = changes SysTick exception state to pending.
Read:
0 = SysTick exception is not pending
1 = SysTick exception is pending.