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Alex thomas
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Alex thomas
Asked: March 29, 2023In:
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Hello, I am designing a PCB that’s using the built-in serial/JTAG controller and OTG peripheral of the ESP32-S3. It can not hold a physical boot or reset buttons. It has a USB-C container with the D/D- lines connected to GPIO20 and ...Read more

Hello,

I am designing a PCB that’s using the built-in serial/JTAG controller and OTG peripheral of the ESP32-S3. It can not hold a physical boot or reset buttons. It has a USB-C container with the D/D- lines connected to GPIO20 and GPIO19, respectively.

Are there any ways of going without buttons for reset or is an external USB to UART IC needed?

For boot mode choosing I exactly hold a jumper that when shorted pulls GPIO0 to GND, is there a better way to do that without a button?

Any help is appreciated.

Thank You

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bootcontrollersesp32firmwaregpio19GPIO20internaljtagpcbserial
  1. ashishgawade

    Hello, The USB-serial-JTAG port can usually reset/put the chip into boot mode without any external components. It's still advised to have some way to pull IO0 low for initial programming and during development, if you make a mistake where e.g. your program disables the USB function. A jumper will peRead more

    Hello,

    The USB-serial-JTAG port can usually reset/put the chip into boot mode without any external components. It’s still advised to have some way to pull IO0 low for initial programming and during development, if you make a mistake where e.g. your program disables the USB function. A jumper will perform that function just fine.

    Thank You

    Ashish

     

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nidhi singh
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nidhi singh
Asked: September 26, 2022In:
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RA6T2 Internal Flash?

Hi, I am curious about what kind of the internal flash of RA6T2 is? Is it NOR flash or NAND flash? According to the program and erase size, it seems to be NOR flash? still, what’s the physical interface of the flash? ...Read more

Hi,

I am curious about what kind of the internal flash of RA6T2 is? Is it NOR flash or NAND flash?
According to the program and erase size, it seems to be NOR flash?

still, what’s the physical interface of the flash? Does it use the SPI or other?
If it was NOR flash.Thanks

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flashinternalnorra6t2renesasRenesas Microcontrollerspi
  1. vikas Nagpal

    RA6T2 uses the Renesas proprietary Metal Oxide Nitride Oxide Semiconductor( MONOS) flash technology, it's neither NOR nor NAND. You can search the general web or the Renesas web pages and find information about this. The interface is a direct register grounded via the flash application command interRead more

    RA6T2 uses the Renesas proprietary Metal Oxide Nitride Oxide Semiconductor( MONOS) flash technology, it’s neither NOR nor NAND. You can search the general web or the Renesas web pages and find information about this.

    The interface is a direct register grounded via the flash application command interface( FACI). From the RA6T2 hardware U/ M
    The FCU( flash control unit) controls the programming and erasure of the flash memory. The FACI( flash application command interface) controls the FCU according to the specified FACI commands.

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