With the rapid development of IoT applications such as wearable devices and smart homes, it is hoped that these products will also have a graphically interactive interface like a smartphone, which makes the performance of the manufacturer's graphics processing of the microcontroller more The higher it is. In response to this phenomenon, STMicroelectronics recently introduced a new series of STM32F469/479 microcontrollers, which are integrated into high-performance ARM Cortex-M4 processors, Chrom-ART Accelerator technology and have been widely used in smartphones and tablets. The MIPI-DSI technology greatly improves the speed of on-the-fly processing and graphics processing display performance, providing a killer function for IoT applications that require a graphical interactive interface. This time, Aiban.com also had the opportunity to experience the STM32F469 Discovery development board based on the STM32F469 series MCU. Let's take a look at it.
STM32F469 Discovery Development BoardSTM32F469 also uses the classic butterfly package of STM32F series, but the difference is that at first glance, it is not just a simple development board, but a whole piece of big black screen, which is a little bit of aesthetics. Can't help but admire.
After taking out the development board, it is very intuitive to see the whole screen. The 4-inch LCD screen is the same as the iphone4 used in the same year. Is there a kind of sigh, the world is developing too fast, and the development board is playing like this? .
On both sides of the front panel of the development board are some LEDs and MEMS microphones. The back side is the core device of the entire board. In other words, this pattern is very similar to ST's STM32F7 Discovery development board. Engineers who have used the ST Discovery development kit know that the ST Discovery Suite allows users to develop applications very quickly and easily, while the onboard hardware peripherals are basically used to better evaluate the functionality of the microcontroller. Conventionally, let's take a closer look at what resources the STM32F469 Discovery board has.
The specific resources are as follows:
STM32F469NIH6 microcontroller in BGA216 package
16MB SDRAM, 16MB SPI Nor Flash
USB OTG FS
MicroSD card, I2C expansion interface
SAI audio DAC, a stereo headphone output connector
3 MEMS digital microphones
SDRAM, four-channel SPI flash
4.0" color LCD-TFT with capacitive screen, resolution 800*480
4 LED indicators, user buttons, reset button
Arduino UNO extension interface
Onboard ST-LINK/V2-1, an embedded debugger and a programmed STM32 microcontroller supporting mbed
Not surprisingly, the STM32F469 Discovery also supports the mbed project, and it seems that the future ST series development kits will "evolve" along this trend.
The hardware system block diagram of the STM32F469 Discovery board is as follows:
Then look at the core microcontroller STM32F469NIH6 on the board, which is also the world's first MCU with integrated MIPI-DSI interface. It sounds quite "bluffing". MIPI-DSI is the display standard specification for the mobile industry processor interface. The serial interface connects to the display with a small number of pins and can increase the supported display resolution. We can usually see in the disassembly of online smartphones and tablets. As for the integrated MIPI interface of the microcontroller, it is really unheard of. It seems that the STM32F469NIH6 has taken the title of the world's first.
Based on high-performance ARM Cortex-M4 processor, STM32F469NIH6 integrates FPU unit and DSP. The maximum frequency is 180MHz. The internal integrated 2MB Flash and 384 KB SRAM storage space. The rich peripheral resources include SPI, FMC, Ethernet MAC, SDMMC, USB FS, camera interface, I2S and other interfaces, please refer to the hardware system block diagram below. (click on the image to enlarge)
Of course, the most important thing for this microcontroller is the graphics processing and display resources, including:
Chrom-ART Accelerator
TFT LCD controller
MIPI-DSI interface
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