PM0223 datasheet(90/110 Pages) STMICROELECTRONICS

90 / 110 page

STM32L0 Core Peripherals

PM0223

90/110

DocID025763 Rev 1

Table 31. ICSR bit assignments

Bits

Name

Type Function

[31]

NMIPENDSET

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

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

PendSV clear-pending bit.

Write:

0 = No effect.

1 = Removes the pending state from the PendSV exception.

[26]

PENDSTSET

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.

[25]

PENDSTCLR

SysTick exception clear-pending bit.

Write:

0 = No effect.

1 = Removes the pending state from the SysTick exception.

This bit is WO. On a register read its value is Unknown.

[24:18] -

Reserved.

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