Electrical – What does “Low density device” mean? About STM8 / STM32

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STM32 and STM8 devices have some types:

Low density devices
Medium density devices
High density devices

About what "density" mean?
About quantity of periphery or about quantity of flash or something else?

Best Answer

They're arbitrary terms used by ST to distinguish different lines of MCUs within a series. Generally speaking, all of the parts within a line will have all the same peripherals and features; they will differ only in the amount of RAM and flash memory they have, and in packaging.

For instance, here's how ST breaks down the STM32F103 family:

The terms "value line" and "connectivity line" also appear in some series; those are also treated as lines.

Related Solutions

Electronic – STM32 program not executing

Here is the simplest possible LED flasher program that works on the STM32VL Discovery board:

/* Test.c
** Simple program for STM32F100RB to flash LED on PC_9
**
*/

#include <stm32f10x.h>

void delay(void);

void main(void)
{
  // I/O port C clock enable
  RCC->APB2ENR = RCC_APB2ENR_IOPCEN;
  // Set PC_9 to output 
  GPIOC->CRH &= ~(GPIO_CRH_MODE9 | GPIO_CRH_CNF9);
  GPIOC->CRH |= GPIO_CRH_MODE9;

  while(1)
  {
    GPIOC->BSRR = (1<<9);
    delay();
    GPIOC->BRR = (1<<9);
    delay();
  }
}

void delay(void)
{
  volatile unsigned int i;

  for (i = 0; i < 20000; i++)
    ;
}

Electronic – STM32F103 – TIM5 doesn’t exist on medium density devices ? How to tell what else is missing

It doesn't seem to be spelled out very well, but you can look at the STM32F103x8/STM32F103xB datasheet:

Page 11 contains a diagram showing the peripherals available.

Section 2.3.15 Timers and watchdogs shows the timers available.

You will need to consult either the diagram on page 11 or the section specific to the type of peripheral you are looking at.

TIM5 and TIM8 are not available on your device.

Timers available are TIM1, TIM2, TIM3 and TIM4.

Best Answer

Related Solutions

Electronic – STM32 program not executing

Electronic – STM32F103 – TIM5 doesn’t exist on medium density devices ? How to tell what else is missing

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