mindstormsguy
Well-Known Member
"It's acknowledging" or "it's a bug when the truck comes out of sleep and provides power to the taillight control module"?
As an electrical engineer, I strongly suspect the latter. Some EE made a power sequencing error or similar. It's a common rookie mistake. Most likely, an LED driver gets partially powered up shortly before the actual microcontroller that's responsible for controlling the LED driver is powered on enough to initialize its GPIOs (output signals between chips on a circuit board). There's probably some software that takes a non-zero amount of time to properly initialize, and the hardware design doesn't properly hold the LEDs off in the meantime.
It's a bug. And they probably didn't notice before they released the design, because they never tested sleep mode. Back in 2022, they didn't even shut off the power steering when the truck was turned off. I bet they weren't powering off the tail light control module during initial hardware validation either. So they probably didn't find this problem till it was too late. And they presumably have more important areas to spend their engineering efforts right now (like R2).
As an electrical engineer, I strongly suspect the latter. Some EE made a power sequencing error or similar. It's a common rookie mistake. Most likely, an LED driver gets partially powered up shortly before the actual microcontroller that's responsible for controlling the LED driver is powered on enough to initialize its GPIOs (output signals between chips on a circuit board). There's probably some software that takes a non-zero amount of time to properly initialize, and the hardware design doesn't properly hold the LEDs off in the meantime.
It's a bug. And they probably didn't notice before they released the design, because they never tested sleep mode. Back in 2022, they didn't even shut off the power steering when the truck was turned off. I bet they weren't powering off the tail light control module during initial hardware validation either. So they probably didn't find this problem till it was too late. And they presumably have more important areas to spend their engineering efforts right now (like R2).
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