Falling Trigger Selection Register (Exti_Ftsr); Software Interrupt Event Register (Exti_Swier) - ST STM32F40 Series Reference Manual

Interrupts and events
15 14 13
TR15 TR14 TR13 TR12
rw rw rw
Bits 31:23 Reserved, must be kept at reset value.
Bits 22:0 TRx: Rising trigger event configuration bit of line x
Note: The external wakeup lines are edge triggered, no glitch must be generated on these lines.
If a rising edge occurs on the external interrupt line while writing to the EXTI_RTSR register,
the pending bit is be set.
Rising and falling edge triggers can be set for the same interrupt line. In this configuration,
both generate a trigger condition.
10.3.4

Falling trigger selection register (EXTI_FTSR)

Address offset: 0x0C
Reset value: 0x0000 0000
31 30 29
15 14 13
TR15 TR14 TR13 TR12
rw rw rw
Bits 31:23 Reserved, must be kept at reset value.
Bits 22:0 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.
10.3.5

Software interrupt event register (EXTI_SWIER)

Address offset: 0x10
Reset value: 0x0000 0000
31 30 29
261/1422
12 11 10 9
TR11 TR10 TR9
rw rw rw rw
0: Rising trigger disabled (for Event and Interrupt) for input line
1: Rising trigger enabled (for Event and Interrupt) for input line
28 27 26 25
Reserved
12 11 10 9
TR11 TR10 TR9
rw rw rw rw
28 27 26 25
Reserved
Doc ID 018909 Rev 4
8 7 6 5
TR8 TR7 TR6 TR5
rw rw rw rw
24 23 22 21
TR22 TR21
rw rw
8 7 6 5
TR8 TR7 TR6 TR5
rw rw rw rw
24 23 22 21
SWIER SWIER
22 21
rw rw
4 3 2
TR4 TR3 TR2 TR1
rw rw rw rw
20 19 18 17
TR20 TR19 TR18 TR17
rw rw rw rw
4 3 2
TR4 TR3 TR2 TR1
rw rw rw rw
20 19 18 17
SWIER SWIER SWIER SWIER
20 19 18 17
rw rw rw rw
RM0090
1 0
TR0
rw
16
TR16
rw
1 0
TR0
rw
16
SWIER
16
rw