Author Topic: (Unintentional) Comedy in data sheets  (Read 1405 times)

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Online AndyC_772Topic starter

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(Unintentional) Comedy in data sheets
« on: November 23, 2021, 11:37:22 am »
Just spotted this buried in the reference manual for an STM32 microcontroller:

"It must be used only if the product supply voltage is below 2.5 V. Setting this bit when VDD is higher than 2.5 V might be destructive"

I couldn't help but chuckle. Anyone else spotted anything in a data sheet that was meant to be funny, or wasn't meant to be but was anyway?

Offline Yansi

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Re: (Unintentional) Comedy in data sheets
« Reply #1 on: November 23, 2021, 11:41:20 am »
I do not see anything funny about it.

Better tell us which datahseet and where have you seen it.
 

Offline mzzj

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Re: (Unintentional) Comedy in data sheets
« Reply #2 on: November 23, 2021, 11:57:45 am »
 

Offline HwAoRrDk

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Re: (Unintentional) Comedy in data sheets
« Reply #3 on: November 23, 2021, 12:02:35 pm »
Face colour is what now?? ???

 
The following users thanked this post: thm_w, TheBay

Offline penfold

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Re: (Unintentional) Comedy in data sheets
« Reply #4 on: November 23, 2021, 12:06:29 pm »
In the LM339 datasheet, page 14 near the bottom...

Quote
NOTE
If a negative supply is not being used, do not place a capacitor between the GND pin of the device and system ground.

It's the only time I've seen such a recommendation, made me chuckle to think of the number of support requests of "your comparator is rubbish, it only works for a millisecond after I switch it on, then nothing" before they decided to update the datasheet.
 

Offline SiliconWizard

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Re: (Unintentional) Comedy in data sheets
« Reply #5 on: November 23, 2021, 06:43:01 pm »
We probably all have a different sense of what funny is. :horse:
 

Offline Terry Bites

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Re: (Unintentional) Comedy in data sheets
« Reply #6 on: November 23, 2021, 09:14:47 pm »
All datasheets have WTF in there somewhere. No laughing matter.

Here's a few infantile lav joke companies.
Every datasheet's a winner here: www.fart-neon.com/en/products-power/products/
The foward slash is a recent edition - their original website had a locations drop down "fart all over the world"
See

Then there's www.sick.com (something to do with pricing I believe) and the classic Bulgin knob catalogue. Sadly out of print. For uk, kiwis and aussies-
www.waynekerrtest.com based in Bognor, where else?

 

Offline thm_w

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Re: (Unintentional) Comedy in data sheets
« Reply #7 on: November 23, 2021, 09:55:23 pm »
Better tell us which datahseet and where have you seen it.
https://comm.eefocus.com/media/download/index/id-1014214

Function is HAL_SYSCFG_EnableIOSpeedOptimize (  * @brief  To Enable optimize the I/O speed when the product voltage is low.)
Which leads us to SET_BIT(SYSCFG->CCCSR, SYSCFG_CCCSR_HSLV);

I guess its driving extra current into the IO? Maybe bypassing a series resistance on the pin?
So presumably at 3.3V it could burn something out.
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