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Hi,
I'm using P82B715 in order to extend my sensor cable lenght if needed.
Here is my setup (same as datasheet):
I'm using the DIP packege in input and SOIC package at output since my board at the output is 3x3cm very small PCB.
The problem is that the sensors in the output board are...
Hi all,
I'm using Mentor Graphics PADS VX.1.2.
After a while, I needed to reopen my old project for some upgrades.
When I did an ECO to PCB from the ".sch" file to the ".pcb" file, everything got mixed. I found out that the ref.des.(reference designator) numbers are changed and does not match...
Hi,
There has been some developments on this issue. The previous solution was not actually a solution, it was a weak workaround.
First of all, technical support from ST said that I need to put 100nF capacitor, and I should remove the pull-up, as there is a pull-up internally. So I did what...
Hi all,
I'm using STM32F407VGT6 MCU with LQFP-100 package.
After I implemented the SMTP client application to my project, I started getting the errors below (the list is normally longer):
...
...
E4-v1-SW\E4-v1-SW.axf: Error: L6406E: No space in execution regions with .ANY selector matching...
Hi,
I increased the reset capacitance even more to 66uF (around 75uF as I measured) and the problem solved.
Now I have problems when downloading the program to the flash, but I can sort it out through settings in uVision I guess.
Ogulcan
Hi,
I wrote a very basic software that can work on my board. The behavior is same, so the issue is not software related.
However, I increased the reset capacitor and now the MCU boots most of the time, especially it boots when I plug a real laptop adaptor (19V) feed from mains.
If I set my...
Yeah, I'm sure about that, none of the peripherals work in the "not booting" phase. It also draws less current (about 30% less) in that phase. I believe the program counter does not run, but I can see the crystal oscillates in this phase.
Another thing is if I start the debugging feature from...
No, there is no other pullup, I measured it with multimeter, but maybe there is some other connection to Vcc through RST pin inside the MCU, who knows :)
I have a starting tone, I have LCD, RS232 everything, basically I can understand that it boots.
I've actually done many software...
Hi,
I now have C7 as 10uF and R15 as 100k ohms.
Remember the circuit:
Here is the response to power up:
Do you think I should increase the time constant even more?
Thanks,
Ogulcan
So you mean the signal lines are better not connected angled, instead they should be connected 180 degrees to prevent distortion, EMI etc.
I've bypassed my power stage and connected 3.3V directly to my 3.3V node, and guess what? The crystal distortion problem is solved in this scenario. So this...
I'll try to follow your recommendations if I need to redraw my PCB, but as far as I understand, this problem is not really caused by the crystal (although it can be improved), maybe it affects, but it's not the main problem.
What do you mean by this?
I've checked this several times and also different days while the PCB's are in the same environment.
Here is the PCB near crystal:
TOP:
BOT:
Thanks,
Ogulcan
It's not problem when I share partially.
I shot videos and converted them to GIF, here are the oscillator screens:
Old design:
New design:
I''ll send PCB's in an hour.
You can see it by oscilloscope, but when you take the screenshot, there is not much difference, but there is a significant difference when you see it in real. I need to take a video I guess.
I tried to do my best for the oscillator in general. But there are too much signal lines around. I put...
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