STM32F479AI datasheet(25/208 Pages) STMICROELECTRONICS

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DocID028010 Rev 2

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STM32F479xx

Functional overview

Video mode pattern generator:

•

Vertical and horizontal color bar generation without LTDC stimuli

•

BER pattern without LTDC stimuli

2.13

Chrom-ART Accelerator™ (DMA2D)

The Chrom-Art Accelerator™ (DMA2D) is a graphic accelerator which offers advanced bit

blitting, row data copy and pixel format conversion. It supports the following functions:

•

Rectangle filling with a fixed color

•

Rectangle copy

•

Rectangle copy with pixel format conversion

•

Rectangle composition with blending and pixel format conversion.

Various image format coding are supported, from indirect 4bpp color mode up to 32bpp

direct color. It embeds dedicated memory to store color lookup tables.

An interrupt can be generated when an operation is complete or at a programmed

watermark.

All the operations are fully automatized and are running independently from the CPU or the

DMAs.

2.14

Nested vectored interrupt controller (NVIC)

The devices embed a nested vectored interrupt controller able to manage 16 priority levels,

and handle up to 93 maskable interrupt channels plus the 16 interrupt lines of the Cortex®-

M4 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 state automatically saved

•

Interrupt entry restored on interrupt exit with no instruction overhead

This hardware block provides flexible interrupt management features with minimum interrupt

latency.

2.15

External interrupt/event controller (EXTI)

The external interrupt/event controller consists of 23 edge-detector lines used to generate

interrupt/event requests. Each line can be independently configured to select the trigger

event (rising edge, falling edge, both) and can be masked independently. A pending register

maintains the status of the interrupt requests. The EXTI can detect an external line with a

pulse width shorter than the Internal APB2 clock period. Up to 159 GPIOs can be connected

to the 16 external interrupt lines.

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