STM32MP157DAB1T datasheet(44/259 Pages) STMICROELECTRONICS

44 / 259 page

Functional overview

STM32MP157A/D

44/259

DS12504 Rev 5

3.31

Display serial interface (DSI)

The display serial interface (DSI) is part of a group of communication protocols defined by

the MIPI® Alliance. The MIPI® DSI host controller is a digital core that implements all

protocol functions defined in the MIPI® DSI specification.

It provides an interface between the system and the MIPI® D-PHY, allowing the

communication with a DSI-compliant display.

•

Compliant with MIPI® Alliance standards

•

Interface with MIPI® D-PHY

•

Supports all commands defined in the MIPI® Alliance specification for DCS

•

Supports up to two D-PHY data lanes at 1 Gbps

•

Bidirectional communication and escape mode support through data lane 0

•

Supports non-continuous clock in D-PHY clock lane for additional power saving

•

Supports ultra-low-power mode with PLL disabled

•

ECC and checksum capabilities

•

Support for end of transmission packet (EoTp)

•

Fault recovery schemes

•

Configurable selection of system interfaces:

–

AMBA APB for control and optional support for generic and DCS commands

–

Video mode interface through LTDC

–

Adapted command mode interface through LTDC

–

Independently programmable virtual channel ID in video mode, adapted command

mode and APB slave

•

Video mode interfaces features:

–

LTDC interface color coding mappings into 16, 18 and 24-bit interface

–

Programmable polarity of all LTDC interface signals

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Maximum resolution is limited by available DSI physical link bandwidth

•

Adapted interface features:

–

Support for sending large amounts of data through the memory_write_start (WMS)

and memory_write_continue (WMC) DCS commands

–

LTDC interface color coding mappings into 16, 18 and 24-bit interface

•

Video mode pattern generator

3.32

True random number generator (RNG1, RNG2)

All the devices embed two RNG that deliver 32-bit random numbers generated by an

integrated analog circuit.

RNG1 can be defined (in ETZPC) as accessible by secure software only.

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