Good Morning, I was trying to guess the R_on from the curves in the datasheet and got following results: sinking Ron: 3V 1.4Ohm(maybe...

Good Morning, I was trying to guess the R_on from the curves in the datasheet and got following results: sinking Ron: 3V 1.4Ohm(maybe wrong) 5V 30Ohm sourcing Ron: 3V 47Ohm 5V 33Ohm I belive the 3V curve is wrong. It has the decimal point of the y axis in the wrong place. The chart in question is: Figure 23-19. I/O Pin Output Voltage versus Sink Current (V CC = 3V) on page...

I want to test the I2C protocol between two STM32 (STM32L152RC) microcontrollers. Can somebody guide me on how to do it or suggest tutorials? I...

I want to test the I2C protocol between two STM32 (STM32L152RC) microcontrollers. Can somebody guide me on how to do it or suggest tutorials? I have seen some online portals where they are communicating between a microcontroller and any sensor. That I have done already. Now I want to test it between two MCU boards.

I add a boilerplate to each function definition that declares constraints on inputs, expectations of outputs, performance issues, etc. I use...

I add a boilerplate to each function definition that declares constraints on inputs, expectations of outputs, performance issues, etc. I use this to add invariants to the code to detect/enforce these conditions. But, there is nothing that ensures that I've done this -- other than discipline. I'm looking at ways to create an IDL that will allow for more specific criteria to be included ...

I know it's a very specific question, so I don't have many hopes to find a solution here, but I already tried everything and I don't know how to...

I know it's a very specific question, so I don't have many hopes to find a solution here, but I already tried everything and I don't know how to solve the issue I have that is very annoying. I have three PCBs: PCB1 that mounts LPC54101 (M4), PCB2 that mounts LPC54606 (M4), PCB3 that mounts LPC54618 (M4). All these MCUs are from NXP. After I receive the first prototype for each board, I...

Moments ago I posted this only to SED, then remembered the chances someone could help here are perhaps higher (unless the groups...

Moments ago I posted this only to SED, then remembered the chances someone could help here are perhaps higher (unless the groups overlapp completely nowadays....). Anyway, separate post but same, here it goes: A somewhat moronic question but well, perhaps someone has been there and done it. My old (also external) webcam which I use in order to look at my lab when I am not there (USB connec...

I'm not sure which group it was in, but someone who designs toys talked about the extremes they would go to for cost reduction, removing useful,...

I'm not sure which group it was in, but someone who designs toys talked about the extremes they would go to for cost reduction, removing useful, but not essential resistors because they were $0.001 each. I'm trying to find out if there are still 4 bit MCUs used in new products. I see a number of companies who make them, but I have no pricing. I have found 8 bit MCUs that are a

Hi group! As a n00b in the IoT domain I have had trouble finding a suitable open source implementation in C for the LWM2M protocol with DTLS...

Hi group! As a n00b in the IoT domain I have had trouble finding a suitable open source implementation in C for the LWM2M protocol with DTLS support. What I have found so far are following implementations: - Contiki lwm2m: https://github.com/sics-iot/lwm2m-contiki - Wakaama LWM2M: https://github.com/eclipse/wakaama - Awa LWM2M: https://github.com/FlowM2M/AwaLWM2M - Anjay: https://gi

Wow! This group seems to have all but died. It used to be very vibrant. I'm trying to determine how prevalent 4-bit MCUs are in the world. ...

Wow! This group seems to have all but died. It used to be very vibrant. I'm trying to determine how prevalent 4-bit MCUs are in the world. I know lots of products have used 4-bit devices in the past, coffee-makers, remote controls, microwave ovens, etc. I believe at one time, in terms of raw quantity, they outnumbered every other sector. But I don't find very many at mai

Anyone here knowledgeable about eMMC memory? I have a high reliability application where there is concern about memory corruption. What would...

Anyone here knowledgeable about eMMC memory? I have a high reliability application where there is concern about memory corruption. What would happen if I changed the ECC field in the eMMC's Card Specific Data (CSD) register from the default no ECC to the optional BCH(542,512) encoding? Would I still be able to write/read new values to the eMMC normally with the eMMC internally protectin...

The UART/USART peripheral usually available in many microcontrollers triggers a few interrupts. Two of them are DRE (data register empty, as...

The UART/USART peripheral usually available in many microcontrollers triggers a few interrupts. Two of them are DRE (data register empty, as named in AVR documentation) and TXC (transmitter complete). The first can be used to feed the TX FIFO even during shifting out the last pushed data. Documentation usually lacks details on these interrupts, for example exactly WHEN they are trigg...