External Interrupt/Event Controller (Exti); Exti Main Features - ST STM32F207 Series Reference Manual

Interrupts and events
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8.2

External interrupt/event controller (EXTI)

The external interrupt/event controller consists of up to 23 edge detectors for generating
event/interrupt requests. Each input line can be independently configured to select the type
(interrupt or event) and the corresponding trigger event (rising or falling or both). Each line
can also masked independently. A pending register maintains the status line of the interrupt
requests
8.2.1

EXTI main features

The main features of the EXTI controller are the following:
•
independent trigger and mask on each interrupt/event line
• dedicated status bit for each interrupt line
•
generation of up to 23 software event/interrupt requests
• detection of external signals with a pulse width lower than the APB2 clock period. Refer
to the electrical characteristics section of the STM32F20x and STM32F21x datasheets
for details on this parameter.
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Table 20. Vector table (continued)
Type of
Acronym
priority
settable USART6
settable I2C3_EV
settable I2C3_ER
OTG_HS_EP1_OU
settable
T
settable OTG_HS_EP1_IN
settable OTG_HS_WKUP
settable OTG_HS
settable DCMI
settable CRYP
settable HASH_RNG
RM0033 Rev 9
Description
USART6 global interrupt
2
I C3 event interrupt
2
I C3 error interrupt
USB On The Go HS End Point 1
Out global interrupt
USB On The Go HS End Point 1 In
global interrupt
USB On The Go HS Wakeup
through EXTI interrupt
USB On The Go HS global interrupt
DCMI global interrupt
CRYP crypto global interrupt
Hash and Rng global interrupt
RM0033
Address
0x0000_015C
0x0000_0160
0x0000_0164
0x0000_0168
0x0000_016C
0x0000_0170
0x0000_0174
0x0000_0178
0x0000_017C
0x0000_0180