Software Interrupt Event Register (Exti_Swier); Pending Register (Exti_Pr) - ST STM32F410 Reference Manual

Interrupts and events
Bits 22:21 TRx: Falling trigger event configuration bit of line x
0: Falling trigger disabled (for Event and Interrupt) for input line
1: Falling trigger enabled (for Event and Interrupt) for input line.
Bits 20:19 Reserved, must be kept at reset value.
Bits 18:0 TRx: Falling trigger event configuration bit of line x
0: Falling trigger disabled (for Event and Interrupt) for input line
1: Falling trigger enabled (for Event and Interrupt) for input line.
Note: The external wakeup lines are edge triggered, no glitch must be generated on these lines.
If a falling edge occurs on the external interrupt line while writing to the EXTI_FTSR register,
the pending bit is not set.
Rising and falling edge triggers can be set for the same interrupt line. In this configuration,
both generate a trigger condition.
9.3.5

Software interrupt event register (EXTI_SWIER)

Address offset: 0x10
Reset value: 0x0000 0000
31 30 29
Res. Res. Res. Res.
15 14 13
SWIER SWIER SWIER SWIER
15 14 13
rw rw rw
Bits 31:23 Reserved, must be kept at reset value.
Bits 22:21 SWIERx: Software Interrupt on line x
If interrupt are enabled on line x in the EXTI_IMR register, writing '1' to SWIERx bit when it is
set at '0' sets the corresponding pending bit in the EXTI_PR register, thus resulting in an
interrupt request generation.
This bit is cleared by clearing the corresponding bit in EXTI_PR (by writing a 1 to the bit).
Bits 20:19 Reserved, must be kept at reset value.
Bits 18:0 SWIERx: Software Interrupt on line x
If interrupt are enabled on line x in the EXTI_IMR register, writing '1' to SWIERx bit when it is
set at '0' sets the corresponding pending bit in the EXTI_PR register, thus resulting in an
interrupt request generation.
This bit is cleared by clearing the corresponding bit in EXTI_PR (by writing a 1 to the bit).
9.3.6

Pending register (EXTI_PR)

Address offset: 0x14
Reset value: undefined
31 30 29
Res. Res. Res. Res.
208/771
28 27 26 25
Res. Res. Res.
12 11 10 9
SWIER SWIER SWIER
12 11 10 9
rw rw rw rw
28 27 26 25
Res. Res. Res.
24 23 22
SWIER SWIER
Res. Res.
22
rw
8 7 6
SWIER SWIER SWIER SWIER
8 7 6
rw rw rw
24 23 22
Res. Res. PR22 PR21
rc_w1 rc_w1
RM0401 Rev 3
21 20 19 18
SWIER
Res. Res.
21 18
rw rw
5 4 3 2
SWIER SWIER SWIER
5 4 3 2
rw rw rw rw
21 20 19 18
Res. Res. PR18
rc_w1
RM0401
17 16
SWIER SWIER
17 16
rw rw
1 0
SWIER SWIER
1 0
rw rw
17 16
PR17 PR16
rc_w1 rc_w1