Trinket 5V Bootloader Error

Adafruit's tiny microcontroller platform. Please tell us which board you are using.
For CircuitPython issues, ask in the Adafruit CircuitPython forum.

Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.
Locked
User avatar
WilsonLaunchers
 
Posts: 3
Joined: Tue Mar 21, 2023 3:39 pm

Trinket 5V Bootloader Error

Post by WilsonLaunchers »

Hello,

I am trying to enter the bootloader mode on a 5V trinket. After pressing the reset button, the red LED will illuminate for roughly .5 seconds, will dim itself for .5 seconds, and then turn off.

I have attempted entering the bootloader mode with the USB cable plugged in as well as just powering the board from the VBat pin and have received the same result. Additionally, the trinket is currently soldered down to a custom PCB with connections to pins GND, VBAT, 4, 2, 1.

Any ideas as to what might be cause for not being able to enter the bootloader?

User avatar
adafruit_support_carter
 
Posts: 29173
Joined: Tue Nov 29, 2016 2:45 pm

Re: Trinket 5V Bootloader Error

Post by adafruit_support_carter »

The USB cable connection is needed:
https://learn.adafruit.com/introducing- ... er-1415914

Are you sure the USB cable is good?

Also, just to point out, the Trinket 5V is a deprecated product:
https://www.adafruit.com/product/1501

User avatar
WilsonLaunchers
 
Posts: 3
Joined: Tue Mar 21, 2023 3:39 pm

Re: Trinket 5V Bootloader Error

Post by WilsonLaunchers »

Hi Carter,

The USB cable is good! I am able to enter the bootloader mode on other 5V trinkets that I have with the same cable.

The issue I am having is when the board is installed into my custom PCB with pins attached. Ideally, I would like to be able to program the board after it has been soldered in place to make programing changes. Are you still able to enter the bootloader this way?

In a perfect world, I wouldn't have to use the Trinket 5V and could use an M0 to get the job done but none are in stock.

User avatar
adafruit_support_carter
 
Posts: 29173
Joined: Tue Nov 29, 2016 2:45 pm

Re: Trinket 5V Bootloader Error

Post by adafruit_support_carter »

It could be a pin conflict issue on #4:
https://learn.adafruit.com/introducing- ... ns-1805108
between USB and your custom PCB connection.

Locked
Please be positive and constructive with your questions and comments.

Return to “Trinket ATTiny, Trinket M0”