All Questions
14 questions
-1
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2
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71
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What are the VDDSD, VLXSD, and VFBSD pins?
On the STM32WB09KEV, and on MCUs in general, what do the VDDSD, VLXSD, and VFBSD pins mean.
I can see that they have something to do with SMPS (input/output, ground and output), but what do they ...
0
votes
1
answer
785
views
State of STM32 pins from factory and after chip erase
What is the state of pins for an STM32 MCU after chip erase or when the device is fresh from factory?
I'm asking in search of a controlled way to power up and test a new board with STM32.
1
vote
2
answers
1k
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SD card socket just need to wire with pull-up resistors?
I have a question about Micro SD card and STM32F446RE wiring issues. I saw this schematic from ST forum. I would like to ask, when I wiring STM32F446RE with SD card socket (I mean connection part), ...
- 99
0
votes
1
answer
2k
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Unable to toggle an LED with STM32 Blue Pill
I'm a beginner, and I'm using an STM32 Blue Pill board for the first time. I completed a basic tutorial on how to activate the PC13 pin (on-board LED), but now that I'm trying to get an external LED ...
- 285
2
votes
2
answers
251
views
Equivalent solution to soldering STM32F103C8T6 Board [closed]
There is this project I am doing and part of it I will be using a STM32F103C8T6 Board.
Unfortunately, I do not have a soldering kit as i for now I cannot solder the pins of the board.
Is there an ...
- 225
0
votes
1
answer
4k
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STM32F4 I/O Max Voltage Input
I'm having trouble understanding the max voltage input voltage range for an I/O pin on a stm32F11 when powering it with 3.3V.I'm want my STM32 to communicate with a 3.3V input signal and need to know ...
- 155
0
votes
1
answer
385
views
Is a voltage level shifter necessary?
I am using an STM32F100xx MCU and I want to communicate via UART with a GPS module, specifically the A7 Thinker GPS
GPS Module with A7 Thinker from Aliexpress
This module, when a 9V battery is used, ...
1
vote
1
answer
685
views
Changing GPIO pin configuration on the fly
I am using STM32F0 based ARM Cortex-M0 micro controller in my project. Because of lack of available pins, I need to use one pin as an ADC-input and as a GPIO-digital-out (not at the same time, but in ...
- 83
-1
votes
2
answers
372
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Questions about STM32F103C8T6 pins/button [closed]
Recently I bought this STM32F103C8T6 minimum evaluation board STM32F103C8T6, see picture below.
I have some questions about it (see (small) numbers in the picture):
Button S1 is RST (reset button), ...
- 14.1k
0
votes
3
answers
1k
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Three different development boards for STM32F103C8T6
I ordered one of these which has a single row of pins
Single-row
While there are also these which have double row of pins:
Double-row
I wonder what I miss ... of course a lot of pins difference, ...
- 14.1k
1
vote
1
answer
637
views
STM32F4 Nucleo - how to set pins low while uploading firmware?
I am busy trying to write some firmware for a system with a whole lot of digitally controlled hydraulic components, and it's a complex system so there is a lot of tweaking of the algorithm and ...
- 39
3
votes
1
answer
4k
views
TIM 2 PWM Input on different pin STM32F072B Discovery
I'm trying to change the pin, that is connected to TIM2 in PWM Input mode for frequency measurement.
I just compiled the example, tested it and it works on pin PB03, however, when I try to change ...
- 375
7
votes
2
answers
705
views
Why aren't pins on microcontroller grouped together, close to each other?
Simple question, the curiosity is killing me.
Why do microcontrollers (and other IC also, like RAMs) have pins not grouped together?
Like in STM32, for example you have portA and it has 8 bits on ...
- 1,627
0
votes
2
answers
2k
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Bits are high on disabled pins(STM32)
For some reason I have many bits with value 1, even if they are supposed to be turned off.
I tried to debug it with some LEDs and Keil uVision debugger. uC is STM32F103 The situation is:
I have 2 pins ...
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