STM32H723VG datasheet(31/227 Pages) STMICROELECTRONICS

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DS13313 Rev 2

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STM32H723xE/G

Functional overview

3.14

Nested vectored interrupt controller (NVIC)

The devices embed a nested vectored interrupt controller which is able to manage 16

priority levels, and handle up to 140 maskable interrupt channels plus the 16 interrupt lines

of the Cortex®-M7 with FPU core.

•

Closely coupled NVIC gives low-latency interrupt processing

•

Interrupt entry vector table address passed directly to the core

•

Allows early processing of interrupts

•

Processing of late arriving, higher-priority interrupts

•

Support tail chaining

•

Processor context automatically saved on interrupt entry, and restored on interrupt exit

with no instruction overhead

This hardware block provides flexible interrupt management features with minimum interrupt

latency.

3.15

Extended interrupt and event controller (EXTI)

The EXTI controller performs interrupt and event management. In addition, it can wake up

the processor, power domains and/or D3 domain from Stop mode.

The EXTI handles up to 80 independent event/interrupt lines split as 26 configurable events

and 54 direct events.

Configurable events have dedicated pending flags, active edge selection, and software

trigger capable.

Direct events provide interrupts or events from peripherals having a status flag.

3.16

Cyclic redundancy check calculation unit (CRC)

The CRC (cyclic redundancy check) calculation unit is used to get a CRC code using a

programmable polynomial.

Among other applications, CRC-based techniques are used to verify data transmission or

storage integrity. In the scope of the EN/IEC 60335-1 standard, they offer a means of

verifying the Flash memory integrity. The CRC calculation unit helps compute a signature of

the software during runtime, to be compared with a reference signature generated at link-

time and stored at a given memory location.

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