RM0312 datasheet(51/275 Pages) STMICROELECTRONICS

51 / 275 page

DocID022352 Rev 3

51/275

RM0312

Interrupt controller (ITC)

5.9.3

External interrupt control register 1 (EXTI_CR1)

Address offset: 0x00

Reset value: 0x00

654

3210

P3IS[1:0]

P2IS[1:0]

P1IS[1:0]

P0IS[1:0]

Bits 7:6 P3IS[1:0]: Portx bit 3 external interrupt sensitivity bits

These bits can only be written when I1 and I0 in the CCR register are both set to 1 (level 3). They

define the sensitivity of bit 3 of Port A, B, and/or D external interrupts.

00: Falling edge and low level

01: Rising edge only

10: Falling edge only

11: Rising and falling edge

Bits 5:4 P2IS[1:0]: Portx bit 2 external interrupt sensitivity bits

These bits can only be written when I1 and I0 in the CCR register are both set to 1 (level 3). They

define the sensitivity of bit 2 of Port A, B, and/or D external interrupts.

00: Falling edge and low level

01: Rising edge only

10: Falling edge only

11: Rising and falling edge

Bits 3:2 P1IS[1:0]: Portx bit 1 external interrupt sensitivity bits

These bits can only be written when I1 and I0 in the CCR register are both set to 1 (level 3). They

define the sensitivity of bit 1 of Port A, B, and/or D external interrupts.

00: Falling edge and low level

01: Rising edge only

10: Falling edge only

11: Rising and falling edge

Bits 1:0 P0IS[1:0]: Portx bit 0 external interrupt sensitivity bits

These bits can only be written when I1 and I0 in the CCR register are both set to 1 (level 3). They

define the sensitivity of bit 0 of Port A, B, C, and/or D external interrupts.

00: Falling edge and low level

01: Rising edge only

10: Falling edge only

11: Rising and falling edge

RM0312 Datasheet(PDF) 51 Page - STMicroelectronics

RM0312 Datasheet(HTML) 51 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL