ISD91200 Series Technical Reference Manual
Release Date: Sep 16, 2019
- 32 -
Revision 2.4
[7]
CPURF
Reset Source From CPU
The CPURF flag is set by hardware if software writes CPURST (SYS_IPRST0[1])
with a “1” to reset Cortex-M0 CPU kernel and Flash memory controller (FMC).
0= No reset from CPU.
1= The Cortex-M0 CPU kernel and FMC has been reset by software setting
CPURST to 1.
This bit is cleared by writing 1 to itself.
[6]
PMURSTF
Reset Source From PMU
The PMURSTF flag is set if the PMU.
0= No reset from PMU.
1= PMU reset the system from a power down/standby event.
This bit is cleared by writing 1 to itself.
[5]
SYSRF
Reset Source From MCU
The SYSRF flag is set if the previous reset source originates from the Cortex_M0
kernel.
0= No reset from MCU.
1= The Cortex_M0 MCU issued a reset signal to reset the system by software writing
1 to bit SYSRESTREQ(SYSINFO_AIRCTL[2], Application Interrupt and Reset
Control Register) in system control registers of Cortex_M0 kernel.
This bit is cleared by writing 1 to itself.
[4]
Reserved
Reserved.
[3]
LVRF
Low Voltage Reset Flag
The LVRF flag is set if pervious reset source originates from the LVR module.
0 = No reset from LVR
1 = The LVR module issued the reset signal to reset the system.
This bit is cleared by writing 1 to itself.
[2]
WDTRF
Reset Source From WDT
The WDTRF flag is set if pervious reset source originates from the Watch-Dog
module.
0 = No reset from Watch-Dog.
1 = The Watch-Dog module issued the reset signal to reset the system.
This bit is cleared by writing 1 to itself.
[1]
PADRF
The RSTS_PAD Flag Is If Pervious Reset Source Originates From the /RESET
Pin
0 = No reset from Pin /RESET.
1 = Pin /RESET had issued the reset signal to reset the system.
This bit is cleared by writing 1 to itself.
[0]
CORERSTF
Reset Source From CORE
The CORERSTF
flag is set if the core has been reset. Possible sources of reset are
a Power-On Reset (POR), RESETn Pin Reset or PMU reset.
0 = No reset from CORE.
1 = Core was reset by hardware block.
This bit is cleared by writing 1 to itself.
