STMicroelectronics STM32WL5 Series Reference Manual page 515

RM0453
16.6.2 EXTI falling trigger selection register (EXTI_FTSR1)
Address offset: 0x004
Reset value: 0x0000 0000
Contains only register bits for configurable events.
31 30 29
Res. Res. Res. Res.
15 14 13
FT15 FT14 FT13 FT12
rw rw rw
Bits 31:23 Reserved, must be kept at reset value.
Bit 22 FT22: falling trigger event configuration bit of configurable event input 22
Note: The configurable event inputs are edge triggered. No glitch must be generated on
Bit 21 FT21: falling trigger event configuration bit of configurable event input 21
Bits 20:17 Reserved, must be kept at reset value.
Bit 16 FT16: falling trigger event configuration bit of configurable event input 16
Bit 15 FT15: falling trigger event configuration bit of configurable event input 15
Bit 14 FT14: falling trigger event configuration bit of configurable event input 14
Bit 13 FT13: falling trigger event configuration bit of configurable event input 13
Bit 12 FT12: falling trigger event configuration bit of configurable event input 12
Bit 11 FT11: falling trigger event configuration bit of configurable event input 11
Bit 10 FT10: falling trigger event configuration bit of configurable event input 10
Bit 9 FT9: falling trigger event configuration bit of configurable event input 9
Bit 8 FT8: falling trigger event configuration bit of configurable event input 8
Bit 7 FT7: falling trigger event configuration bit of configurable event input 7
Bit 6 FT6: falling trigger event configuration bit of configurable event input 6
Bit 5 FT5: falling trigger event configuration bit of configurable event input 5
Bit 4 FT4: falling trigger event configuration bit of configurable event input 4
Bit 3 FT3: falling trigger event configuration bit of configurable event input 3
Bit 2 FT2: falling trigger event configuration bit of configurable event input 2
Bit 1 FT1: falling trigger event configuration bit of configurable event input 1
Bit 0 FT0: falling trigger event configuration bit of configurable event input 0
28 27 26 25
Res. Res. Res.
12 11 10 9
FT11 FT10 FT9
rw rw rw rw
0: falling trigger disabled (for event and interrupt) for input line
1: falling trigger enabled (for event and interrupt) for input line
these inputs. If a falling edge on the configurable event input occurs while writing to the
register, the associated pending bit is not set.
Rising and falling edge triggers can be set for the same configurable event input. In this
case, both edges generate a trigger.
Extended interrupts and event controller (EXTI)
24 23 22
Res. Res. FT22 FT21
rw
8 7 6
FT8 FT7 FT6
rw rw rw
RM0453 Rev 5
21 20 19 18
Res. Res. Res.
rw
5 4 3 2
FT5 FT4 FT3 FT2
rw rw rw rw
17 16
Res. FT16
rw
1 0
FT1 FT0
rw rw
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