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Interrupts and events
RM0008
9.3.5
Software interrupt event register (EXTI_SWIER)
Address offset: 0x10
Reset value: 0x0000 0000
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
SWIER SWIER SWIER SWIER
Reserved
19
rw
18
rw
17
rw
16
rw
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
SWIER SWIER SWIER SWIER SWIER SWIER SWIER
SWIER SWIER SWIER SWIER SWIER SWIER SWIER SWIER SWIER
15
rw
14
rw
13
rw
12
rw
11
rw
10
rw
9
rw
8
rw
7
rw
6
rw
5
rw
4
rw
3
rw
2
rw
1
rw
0
rw
Bits 31:20
Reserved, must be kept at reset value (0).
Bits 19:0 SWIERx: Software interrupt on line x
Writing a 1 to this bit when it is at 0 sets the corresponding pending bit in EXTI_PR. If the
interrupt is enabled on this line on the EXTI_IMR and EXTI_EMR, an interrupt request is
generated.
This bit is cleared by clearing the corresponding bit of EXTI_PR (by writing a 1 into the bit).
Note: Bit 19 used in connectivity line devices and is reserved otherwise.
9.3.6
Pending register (EXTI_PR)
Address offset: 0x14
Reset value: undefined
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
PR19
PR18
PR17
PR16
Reserved
rc_w1
rc_w1
rc_w1
rc_w1
15
PR15
rc_w1
14
PR14
rc_w1
13
PR13
rc_w1
12
PR12
rc_w1
11
PR11
rc_w1
10
PR10
rc_w1
9
PR9
rc_w1
8
PR8
rc_w1
7
PR7
rc_w1
6
PR6
rc_w1
5
PR5
rc_w1
4
PR4
rc_w1
3
PR3
rc_w1
2
PR2
rc_w1
1
PR1
rc_w1
0
PR0
rc_w1
Bits 31:20
Reserved, must be kept at reset value (0).
Bits 19:0 PRx: Pending bit
0: No trigger request occurred
1: selected trigger request occurred
This bit is set when the selected edge event arrives on the external interrupt line. This bit is
cleared by writing a 1 into the bit or by changing the sensitivity of the edge detector.
Note: Bit 19 is used in connectivity line devices only and is reserved otherwise.
180/995
Doc ID 13902 Rev 9
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