XC886/888CLM
Interrupt System
User’s Manual
5-31
V1.3, 2010-02
Interrupt System, V 1.0
Register NMISR can only be cleared by software or reset to the default value after the
power-on reset/hardware reset/brownout reset. The register value is retained on any
other reset such as watchdog timer reset or power-down wake-up reset. This allows the
system to detect what caused the previous NMI.
FNMIPLL
1
rwh
PLL NMI Flag
0
No PLL NMI has occurred.
1
PLL loss-of-lock to the external crystal has
occurred.
FNMIFLASH
2
rwh
Flash NMI Flag
0
No Flash NMI has occurred.
1
Flash NMI has occurred.
FNMIOCDS
3
rwh
OCDS NMI Flag
0
No OCDS NMI has occurred.
1
Reserved
FNMIVDD
4
rwh
VDD Prewarning NMI Flag
0
No
V
DD
NMI has occurred.
1
V
DD
prewarning (drop to 2.3 V) has occurred.
FNMIVDDP
5
rwh
VDDP Prewarning NMI Flag
0
No
V
DDP
NMI occurred.
1
V
DDP
prewarning (drop to 4.0 V for external
power supply of 5.0 V) has occurred.
FNMIECC
6
rwh
ECC NMI Flag
0
No ECC error has occurred.
1
ECC error has occurred.
0
7
r
Reserved
Returns 0 if read; should be written with 0.
Field
Bits
Type Description
*