Contents
What kind of SDRAM is stm32h743ii microcontroller?
I am using stm32h743ii microcontroller and interfaced with a external sdram of 512mb ( micron – MT48LC64M8A2P) . I have created the initial code using cubemx and performing basic read write test code by taking a reference of example code provided with stm32h7 firmware.
What kind of memory controller does STM32F7 use?
The FMC controller integrated in STM32F7 products provides external memory support through three memory controllers: the NOR Flash/PSRAM controller, the SDRAM controller and the NAND memory controller. This enables the CPU to communicate with external memories including NOR and NAND Flash memories, PSRAM, SRAM, and SDRAM.
How does FMC work with NAND flash memory?
The FMC generates the appropriate signals to drive NAND Flash memory. The address, data, and control signals are shared with the NOR / PSRAM controller.
How many SDRAM banks can a FMC controller support?
The FMC controller offers two independent SDRAM banks to support separate external memories. Each bank has an independent Chip Select and an independent configuration. Each SDRAM bank can support memory devices with up to 4 internal banks. The device size is programmable with up to
What is the memory clock rate of stm32h7?
Certain variants like the STM32H7 series are high performance MCUs that can be clocked as fast as 400 MHz. The resulting synchronous external memory clock rate can be 200 MHz. Here are the rules you need to keep in mind when routing STM32 SDRAM interface lines:
What does external SDRAM do on a STM32?
Some STM32 MCUs do have external memory controllers, called FSMC or Flexible Static Memory Controller in SMT32 literature. They allow addition of external flash and SDRAM memory chips to extend the type of storage that you might need for your application. Adding external SDRAM takes up a bunch of physical I/O pins on the microcontroller.
Where are the pins on a STM32 PCB?
A 5 mil wide trace on signal layer acts like a ~50 ohm transmission line. Let’s face it, most BGA STM32 chips have terrible BGA SDRAM interface pinouts. The pins are scattered all over the grid and need to be routed to the appropriate SDRAM balls, which are planned in a JEDEC compliant manner.