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volt.tech Latest Questions

vikas Nagpal
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vikas Nagpal
Asked: February 6, 2023In: Wireless Connectivity

Why ESP-32 Can Still Work after the Capacitor of the Crystal Oscillator?

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Hello, In the average assignments, the software controller chip outputs a high and low-level signal with a frequency of 100HZ at GPIO5. When we suddenly- circuit the load capacitance of the 40 MHz crystal oscillator, the output signal of GPIO5 changes ...Read more

capacitorcontrollercrystalesp32gpio5oscillatorsoftware
  • 1 Answer
  • 0 Followers
Answer
  1. Alex thomas
    Added an answer on February 7, 2023 at 10:03 am

    Hello, Yeah, do not do that, it runs the ESP out of specs and we can not guarantee anything wrt how it works in that case. For an explanation, I am just guessing then, but the CPU runs off the internal PLL. While that PLL uses the Xtal as a reference, it has its own VCO that gets tuned to run in synRead more

    Hello, Yeah, do not do that, it runs the ESP out of specs and we can not guarantee anything wrt how it works in that case. For an explanation, I am just guessing then, but the CPU runs off the internal PLL. While that PLL uses the Xtal as a reference, it has its own VCO that gets tuned to run in sync with the xtal frequency. Could be that shorting the xtal makes the VCO still run, but not veritably stably, and at the lowest frequency it happens to be suitable to reach, and that is what you see.

    Thank You

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ashishgawade
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ashishgawade
Asked: February 3, 2023In: Microcontroller

How GPT Trigger ADC without using FSP?

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Hi, I would like to trigger ADC conversion with GPT capture and compares events without using the FSP configuration. I couldn’t figure out how to do it, is there any example project about it? Thank you

adcfspgptmcumicrocontrollersmicroprocessorsrenesastrigger
  • 1 Answer
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Answer
  1. vikas Nagpal
    Added an answer on February 4, 2023 at 11:12 am

    Hello, It’s easy. see the section, 3 of the manual (RA4M1) To trigger the A/D, write to register ELSR8 (R_ELC. ELSR (8), and the number you write to that register is the event number shown in table 18.3, nearly between 0x57 and 0x96, depending on which timer, which event (and maybe which processor).Read more

    Hello,

    It’s easy. see the section, 3 of the manual (RA4M1)

    To trigger the A/D, write to register ELSR8 (R_ELC. ELSR (8), and the number you write to that register is the event number shown in table 18.3, nearly between 0x57 and 0x96, depending on which timer, which event (and maybe which processor).

    First, you have to enable the ELC registers by writing 1 to R_ELC. ELCR and writing to the module stop register.

    You also have to inform the A/D by writing 9 to ADSTRGR (see section 35.2.12)

    Thank You

    Vikas

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Alex thomas
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Alex thomas
Asked: February 1, 2023In: Power Management

SBC TLE9471ESVCAN_UV condition

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Hii, In TLE9471ES when VCAN_UV is touched off the TLE9471ES will disable the CAN transmitter. That means the CAN event is still in working condition. So, my question is when the VCAN_UV fault is still present can the CAN signals be dependable ...Read more

managementspowertle9471estle9471esvcan_uvtransmitter
  • 1 Answer
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Answer
  1. nidhi singh
    Added an answer on February 2, 2023 at 10:48 am

    Hii, Thanks for your query. The voltage at the CAN supply pin is covered in CAN Normal and Receive Only Mode. In the case of VCAN Undervoltage signalization via SPI bit VCAN_UV is touched off and the TLE9471ES disables the transmitter stage. If the CAN supply reaches a higher position than the underRead more

    Hii,

    Thanks for your query.

    The voltage at the CAN supply pin is covered in CAN Normal and Receive Only Mode. In the case of VCAN
    Undervoltage signalization via SPI bit VCAN_UV is touched off and the TLE9471ES disables the transmitter stage.
    If the CAN supply reaches a higher position than the under-voltage finding threshold (VCAN>VCAN_UV,r), the transceiver is automatically switched back to CAN Normal Mode.
    The under-voltage finding is enabled if the mode bit CAN_1 = ‘ 1 ’, i.e., in CAN Normal or CAN Receive Only
    Mode. As the Receiver is also powered by the VCAN, in case of insufficient supply, it may not transmit the signals correctly and admit them correctly. PFA for further information.

    Regards,

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vikas Nagpal
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vikas Nagpal
Asked: January 30, 2023In: LEDs & Optoelectronics

Can LED2472G be applied as a shift register to drive signal relays?

  • 0

Hello, Can LED2472G be applied as a shift register to drive signal relays with a coil current of <30mA? Can they be applied as general shift registers too? Thanks!

ledled2472goptoelectronicsregistersignal relays
  • 1 Answer
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Answer
  1. Alex thomas
    Added an answer on January 31, 2023 at 11:57 am

    Welcome, to the community! Well, LED2472G is a move register, but it can simply be used as similar to a limited extent the individual outputs (bits) are actually constant-current LED drivers, so they aren't actually able for sense purposes. But of course, you can control the loads connected to the iRead more

    Welcome, to the community!

    Well, LED2472G is a move register, but it can simply be used as similar to a limited extent the individual outputs (bits) are actually constant-current LED drivers, so they aren’t actually able for sense purposes. But of course, you can control the loads connected to the individual outputs logically in the same way as a shift register. Only the serial output is directly similar to a classic shift register.

    Still, one could imagine using LED2472G to drive 30mA relays, indeed if this doesn’t correspond to the original purpose. But you mustn’t forget the usual free-wheeling diodes, which due to the unspecified avalanche energy should better be Schottky diodes because only they’re fast enough. Evenultra-fast diodes with a blocking time of 10.20 ns are probably too slow not to damage the respective LED driver- at least nothing guarantees that.

    Does it answer your question?

    Regards

    Alex

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nidhi singh
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nidhi singh
Asked: January 24, 2023In: Wireless Connectivity

ESP32- CAM What’s the Max Capacity of the MicroSD Card?

  • 0

Hi, I would want to see what’s the maximum capacity of the MicroSD card to stay completely compatible with the ESP- 32 CAM specifications 32 Gb. further than 32Gb? Thank you for your answer, Nidhi Singh

32gbcamcardesp32espressifmicrosd
  • 1 Answer
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Answer
  1. vikas Nagpal
    Added an answer on January 30, 2023 at 10:20 am

    Hello Nidhi, Above 32 GB, the card has to be formatted applying the exFAT filesystem. exFAT is supported in IDF through the FatFS library, but the support is disabled by default. You can modify #defineFF_FS_EXFAT 0 in ffconf.h from 0 to 1, and also rebuild the operation. Thank You

    Hello Nidhi,

    Above 32 GB, the card has to be formatted applying the exFAT filesystem.
    exFAT is supported in IDF through the FatFS library, but the support is disabled by default. You can modify #defineFF_FS_EXFAT 0 in ffconf.h from 0 to 1, and also rebuild the operation.

    Thank You

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Alex thomas
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Alex thomas
Asked: January 23, 2023In: Microcontroller

Switching from Community to RA Processor?

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Hello, We are changing a product from a Community to an RA processor. Can we use the same E2 Studio and switch between SSP and FSP? We’ll have times when we are doing maintenance on the Community product and also doing ...Read more

e2 studiofspmcuprocessorrarenesasssp
  • 1 Answer
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Answer
  1. nidhi singh
    Added an answer on January 25, 2023 at 11:19 am

    Hi Alex, The FSP and SSP releases are at a different meter and each version released is tested/ qualified against a specific version of e2-studio. The distribution download of the platform installer will ensure that the proper version of e2-studio will be with the FSP/ SSP version. I advise that youRead more

    Hi Alex,

    The FSP and SSP releases are at a different meter and each version released is tested/ qualified against a specific version of e2-studio. The distribution download of the platform installer will ensure that the proper version of e2-studio will be with the FSP/ SSP version. I advise that you command a different and specific installation for SSP and FSP.

    Thanks & Regards
    Nidhi

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nidhi singh
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nidhi singh
Asked: January 19, 2023In: Microcontroller

PSoC6 Port 6 GPIO shows a pulse at power up/ programming?

  • 0

Hi, We’re seeing a positive pulse in pin 6.5 while powering up, resetting & programming (via SWD). Please see the attached screenshots. The pin is port 6, which also has SWD and reset lines. We tested the pin with various configurations via ...Read more

gpioInfineonmcumicrocontrollerspsoc6pulse
  • 1 Answer
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Answer
  1. Alex thomas
    Added an answer on January 21, 2023 at 10:31 am

    Hello, By default, all GPIO pins start out at reset as Analog_HiZ. This means the pin though configured at initialization as a draw-down thing inactive low launches life floating until the boot initialization is complete. still, also I suggest an average worth resistor( 100K?) drag-down to GND If thRead more

    Hello,

    By default, all GPIO pins start out at reset as Analog_HiZ. This means the pin though configured at initialization as a draw-down thing inactive low launches life floating until the boot initialization is complete.

    still, also I suggest an average worth resistor( 100K?) drag-down to GND If this is your project case.

    Thank You

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Alex thomas
  • 0
Alex thomas
Asked: January 16, 2023In: Power Management

Why Facing a Peculiar Problem with L5973D

  • 0

Hello, I’m designing a circuit with an L5973D switching controller to give 3.8 v and am facing a peculiar problem. The circuit is as per the design reference in the datasheet and the feedback resistors are given to give 3.8 v ...Read more

dc-dc conversionl5973dpeculiarpower managementproblemresistors
  • 1 Answer
  • 0 Followers
Answer
  1. nidhi singh
    Added an answer on January 20, 2023 at 11:09 am

    Hi, out of my one experience in switch mode power supplies there are a couple of key points to follow when doing these designs. 1. Insure all resistors are 1 type, this limits the change over temperature which in turn will limit the output change variations. 2. Insure the track from the switching poRead more

    Hi,

    out of my one experience in switch mode power supplies there are a couple of key points to follow when doing these designs.

    1. Insure all resistors are 1 type, this limits the change over temperature which in turn will limit the output change variations.

    2. Insure the track from the switching point is close as possible to the coil and doesn’t add resistance to the coil.

    3. Output capacitors require to hold a low ESR type

    hope some of this helps.

    Thanks & Regards

    Nidhi Singh

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ashishgawade
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ashishgawade
Asked: January 12, 2023In: Wireless Connectivity

How to Check EMC in Test Mode for the Certification Process?

  • 0

Hi We’ve to get our hardware certified in a number of different countries. And to meet the certification process the ESP software will need to configure our hardware to different functional countries as there are a number of software-controlled DC/ DC ...Read more

certificationemcespesp32espressiffccsoftware
  • 1 Answer
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Answer
  1. Alex thomas
    Added an answer on January 17, 2023 at 10:26 am

    Hi, Do all possible noise sources have to be enabled during purposeful radiator testing or just those directly coupled to the antenna? Obviously, there is some possibility of dealings between purposeful and unintentional radiator sources. This is how we get stuff like FCC complete modular instrumentRead more

    Hi, Do all possible noise sources have to be enabled during purposeful radiator testing or just those directly coupled to the antenna? Obviously, there is some possibility of dealings between purposeful and unintentional radiator sources. This is how we get stuff like FCC complete modular instrument taking rf shielding and internal regulation. The unintentional radiator sources would be tested independently with purposeful radiators powered off. This may be different from other official authorities.

    Obviously, espressif should give some support similar to allowing gpio control or Lua/upython scripting in the test binary or releasing a library that can be incorporated into IDF designs. perhaps too important fear of CW mode being turned into a jammer? At least it should be available under NDA and usage agreement.

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vikas Nagpal
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vikas Nagpal
Asked: January 11, 2023In: Microcontroller

How RA2A1 24 Bit Single end input measure negative signal?

  • 0

Hello, I am thinking to use RA2A1 MCU to measure a very small AC (50Hz) signal, perhaps millivolt range or lower, but it’s sin wave that has negative amplitude, is RA2A1 MCU single-end input can handle negative signal? Thank You

mcumicrocontrollerra mcura2a1renesasRenesas Microcontrollersignal
  • 1 Answer
  • 0 Followers
Answer
  1. Alex thomas
    Added an answer on January 18, 2023 at 11:50 am

    Hi, You can find the input voltage range in differential input mode in Table 33.7: Thank You

    Hi,

    You can find the input voltage range in differential input mode in Table 33.7:

    Thank You

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