STM32H750XB_Hello/README.md

STM32H750XB Hello World Program

Board

Fire H750XB board

Build System

CMake v3.10+

Build Instructions

mkdir build && cd build
cmake -DCMAKE_TOOLCHAIN_FILE=arm-none-eabi.cmake # Or you can implement yours
make -j${nproc}

Peripherals Utilized

• FMC
• USART0
• TIM2
• TIM3
• TIM7

USART0

• PA9/PA10
• 921600/8N1

TIM2/3

• PWM output on CH3/CH4
• 1kHz base frequency

TIM7

• Tick source

FMC

FMC clock: 133MHz(Maximum frequency under VOS 3 settings)

SDRAM clock: 66.5MHz(FMC clock divided by 2)

Memory component: Winbond W9825G6KH-6(133MHz/CL2)

Memory parameters:

• Column address = 9bits
• Row address = 13bits
• Common clock = 2HCLK
• Burst read = enabled
• Read pipe delay = 0HCLK
• CL = 2 cycles
• tMRD(Load mode rergister) = 2 cycles
• tXSR(Exit self-refresh) = 72ns (~5 cycles)
• tRAS(Self regresh time) = 42ns (~3 cycles)
• tRC(Row cycle delay) = 60ns (~4 cycles)
• tWR(Write recovery) = 2 cycles
• tRP(Row precharge delay) = 15ns (~2 cycles)
• tRCD(Row to column delay) = 15ns (~2 cycles, up to 3 cycles for constraints)

Alternative memory parameters for 250MHz FMC clock(tCK = 8ns):

• Read pipe delay = 1HCLK
• CL = 2 cycles
• tMRD(Load mode rergister) = 2 cycles
• tXSR(Exit self-refresh) = 72ns (~9 cycles)
• tRAS(Self regresh time) = 42ns (~6 cycles)
• tRC(Row cycle delay) = 60ns (~8 cycles)
• tWR(Write recovery) = 2 cycles
• tRP(Row precharge delay) = 15ns (~2 cycles)
• tRCD(Row to column delay) = 15ns (~2 cycles, up to 4 cycles for constraints)