Interrupts and events RM0091
164/742 Doc ID 018940 Rev 1
11.3.3 Rising trigger selection register (EXTI_RTSR)
Address offset: 0x08
Reset value: 0x0000 0000
Note: The external wakeup lines are edge triggered. No glitches must be generated on these
lines. If a rising edge on an external interrupt line occurs during a write operation to the
EXTI_RTSR register, the pending bit is not set.
Rising and falling edge triggers can be set for the same interrupt line. In this case, both
generate a trigger condition.
11.3.4 Falling trigger selection register (EXTI_FTSR)
Address offset: 0x0C
Reset value: 0x0000 0000
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. TR19 Res. TR17 TR16
rw rw rw
1514131211109 87654321 0
TR15 TR14 TR13 TR12 TR11 TR10 TR9 TR8 TR7 TR6 TR5 TR4 TR3 TR2 TR1 TR0
rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw
Bits 31:20 Reserved, must be kept at reset value.
Bit 19 TR19: Rising trigger event configuration bit of line 19
0: Rising trigger disabled (for Event and Interrupt) for input line
1: Rising trigger enabled (for Event and Interrupt) for input line.
Bits 18 Reserved, must be kept at reset value.
Bits 17:0 TRx: Rising trigger event configuration bit of line x (x = 17 to 0)
0: Rising trigger disabled (for Event and Interrupt) for input line
1: Rising trigger enabled (for Event and Interrupt) for input line.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. TR19 Res. TR17 TR16
rw rw rw
1514131211109 87654321 0
TR15 TR14 TR13 TR12 TR11 TR10 TR9 TR8 TR7 TR6 TR5 TR4 TR3 TR2 TR1 TR0
rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw
Bits 31:20 Reserved, must be kept at reset value.
Bit 19 TR19: Falling trigger event configuration bit of line 19
0: Rising trigger disabled (for Event and Interrupt) for input line
1: Rising trigger enabled (for Event and Interrupt) for input line.
Bits 18 Reserved, must be kept at reset value.
Bits 17:0 TRx: Falling trigger event configuration bit of line x (x = 17 to 0)
0: Rising trigger disabled (for Event and Interrupt) for input line
1: Rising trigger enabled (for Event and Interrupt) for input line.
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