STM32F479AI datasheet(25/217 Pages) STMICROELECTRONICS

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STM32F479xx

Functional overview

2.10

Quad-SPI memory interface (QUADSPI)

All STM32F479xx devices embeds a Quad-SPI memory interface, which is a specialized

communication interface targeting Single, Dual, Quad or Dual-flash SPI memories. It can

work in direct mode through registers, external flash status register polling mode and

memory mapped mode. Up to 256 Mbytes external Flash memory are mapped, supporting

8, 16 and 32-bit access. Code execution is supported.

The opcode and the frame format are fully programmable. Communication can be either in

Single Data Rate or Dual Data Rate.

2.11

LCD-TFT controller

The LCD-TFT display controller provides a 24-bit parallel digital RGB (Red, Green, Blue)

and delivers all signals to interface directly to a broad range of LCD and TFT panels up to

XGA (1024x768) resolution with the following features:

•

2 displays layers with dedicated FIFO (64x32-bit)

•

Color Look-Up table (CLUT) up to 256 colors (256x24-bit) per layer

•

Up to 8 Input color formats selectable per layer

•

Flexible blending between two layers using alpha value (per pixel or constant)

•

Flexible programmable parameters for each layer

•

Color keying (transparency color)

•

Up to 4 programmable interrupt events.

2.12

DSI Host (DSIHOST)

The DSI Host is a dedicated peripheral for interfacing with MIPI® DSI compliant displays. It

includes a dedicated video interface internally connected to the LTDC and a generic APB

interface that can be used to transmit information to the display.

These interfaces are as follows:

•

LTDC interface:

–

Used to transmit information in Video Mode, in which the transfers from the host

processor to the peripheral take the form of a real-time pixel stream (DPI).

–

Through a customized for mode, this interface can be used to transmit information

in full bandwidth in the Adapted Command Mode (DBI).

•

APB slave interface:

–

Allows the transmission of generic information in Command mode, and follows a

proprietary register interface.

–

Can operate concurrently with either LTDC interface in either Video Mode or

Adapted Command Mode.

•

Video mode pattern generator:

–

Allows the transmission of horizontal/vertical color bar and D-PHY BER testing

pattern without any kind of stimuli.

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