SYST_CSR

SYST_RVR

SYST_CVR

ICSR

AIRCR

SCR

SHPR1

SHPR2

SHPR3

ENABLE : System Tick Counter Enabled\n
bits : 0 - 0 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

TICKINT : System Tick Interrupt Enabled\n
bits : 1 - 1 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

CLKSRC : System Tick Clock Source Selection\n
bits : 2 - 2 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

COUNTFLAG : System Tick Counter Flag\nReturns 1 if timer counted to 0 since last time this register was read.\nCOUNTFLAG is set by a count transition from 1 to 0.\nCOUNTFLAG is cleared on read or by a write to the Current Value register.
bits : 16 - 16 (1 bit)
access : read-write

RELOAD : System Tick Reload Value\nValue to load into the Current Value register when the counter reaches 0.
bits : 0 - 23 (24 bit)
access : read-write

CURRENT : System Tick Current Value\nCurrent counter value. This is the value of the counter at the time it is sampled. The counter does not provide read-modify-write protection. The register is write-clear. A software write of any value will clear the register to 0. Unsupported bits RAZ (see SysTick Reload Value register).
bits : 0 - 23 (24 bit)
access : read-write

VECTACTIVE : Contains The Active Exception Number\n
bits : 0 - 5 (6 bit)
access : read-write

Enumeration:

End of enumeration elements list.

RETTOBASE : Preempted Active Exceptions indicator\nIndicate whether There are Preempted Active Exceptions\n
bits : 11 - 11 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

VECTPENDING : Number of the Highest Pended Exception\nIndicate the Exception Number of the Highest Priority Pending Enabled Exception\nThe value indicated by this field includes the effect of the BASEPRI and FAULTMASK registers, but not any effect of the PRIMASK register.
bits : 12 - 17 (6 bit)
access : read-write

Enumeration:

End of enumeration elements list.

ISRPENDING : Interrupt Pending Flag, Excluding NMI and Faults (Read only)\n
bits : 22 - 22 (1 bit)
access : read-only

Enumeration:

End of enumeration elements list.

ISRPREEMPT : Interrupt Preempt Bit (Read only)\nIf set, a pending exception will be serviced on exit from the debug halt state.
bits : 23 - 23 (1 bit)
access : read-only

PENDSTCLR : SysTick Exception Clear-Pending Bit Write: Note: This is a write only bit. To clear the PENDST bit, you must write 0 to PENDSTSET and write 1 to PENDSTCLR at the same time.
bits : 25 - 25 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

PENDSTSET : SysTick Exception Set-Pending Bit\nWrite:\n
bits : 26 - 26 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

PENDSVCLR : PendSV Clear-Pending Bit Write: Note: This is a write only bit. To clear the PENDSV bit, you must write 0 to PENDSVSET and write 1 to PENDSVCLR at the same time.
bits : 27 - 27 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

PENDSVSET : PendSV Set-Pending Bit\nWrite:\nNote: Writing 1 to this bit is the only way to set the PendSV exception state to pending.
bits : 28 - 28 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

NMIPENDSET : NMI Set-Pending Bit\nWrite:\nNote: 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.
bits : 31 - 31 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

VECTRESET : Reserved for Debug Use \nThis bit is read as 0. You must write 0 to this bit, otherwise the behavior is Unpredictable
bits : 0 - 0 (1 bit)
access : read-write

VECTCLRACTIVE : Exception Active Status Clear Bit\nSetting This Bit To 1 Will Clears All Active State Information For Fixed And Configurable Exceptions\nThis bit is write only and can only be written when the core is halted.\nNote: It is the debugger's responsibility to re-initialize the stack.
bits : 1 - 1 (1 bit)
access : read-write

SYSRESETREQ : System Reset Request\nWriting This Bit to 1 Will Cause A Reset Signal To Be Asserted To The Chip And Indicate A Reset Is Requested\nThis bit is write only and self-cleared as part of the reset sequence.
bits : 2 - 2 (1 bit)
access : read-write

PRIGROUP : Interrupt Priority Grouping\nThis field determines the Split Of Group priority from subpriority,
bits : 8 - 10 (3 bit)
access : read-write

ENDIANNESS : Data Endianness\n
bits : 15 - 15 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

VECTORKEY : Register Access Key\nWhen writing this register, this field should be 0x05FA, otherwise the write action will be unpredictable.\nThe VECTORKEY filed is used to prevent accidental write to this register from resetting the system or clearing of the exception status.
bits : 16 - 31 (16 bit)
access : read-write

SLEEPONEXIT : Sleep-on-exit Enable Control\nThis bit indicate Sleep-On-Exit when Returning from Handler Mode to Thread Mode.\nSetting this bit to 1 enables an interrupt driven application to avoid returning to an empty main application.
bits : 1 - 1 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

SLEEPDEEP : Processor Deep Sleep and Sleep Mode Selection\nControl Whether the Processor Uses Sleep Or Deep Sleep as its Low Power Mode.\n
bits : 2 - 2 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

SEVONPEND : Send Event On Pending\nWhen an event or interrupt enters pending state, the event signal wakes up the processor from WFE. If the processor is not waiting for an event, the event is registered and affects the next WFE.\nThe processor also wakes up on execution of an SEV instruction or an external event.
bits : 4 - 4 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

PRI_4 : Priority of system handler 4, MemManage
bits : 0 - 7 (8 bit)
access : read-write

PRI_5 : Priority of system handler 5, BusFault
bits : 8 - 15 (8 bit)
access : read-write

PRI_6 : Priority of system handler 6, UsageFault
bits : 16 - 23 (8 bit)
access : read-write

PRI_11 : Priority Of System Handler 11 - SVCall 0 denotes the highest priority and 3 denotes the lowest priority.
bits : 30 - 31 (2 bit)
access : read-write

PRI_14 : Priority Of System Handler 14 - PendSV 0 denotes the highest priority and 3 denotes the lowest priority.
bits : 22 - 23 (2 bit)
access : read-write

PRI_15 : Priority Of System Handler 15 - SysTick 0 denotes the highest priority and 3 denotes the lowest priority.
bits : 30 - 31 (2 bit)
access : read-write