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From: Sergey Kubushyn <ksi@koi8.net>
Newsgroups: sci.electronics.design
Subject: Re: hefty data sheet
Date: Sat, 15 Mar 2025 22:29:45 -0000 (UTC)
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jlArbor.com wrote:
> On Sat, 15 Mar 2025 14:56:25 -0400, bitrex <user@example.net> wrote:
> 
>>On 3/14/2025 6:34 PM, john larkin wrote:
>>> https://www.ti.com/lit/pdf/spruim2
>>> 
>>> That's 10419 pages. Has anyone seen a bigger data sheet?
>>> 
>>> And what's a spruim?
>>> 
>>
>>I need a printed copy to put on someone's desk when they says "8 bit is 
>>obsolete, just use an ARM"
> 
> If you print on both sides, the stack will be about 2 feet high.
> Better buy some toner things.
> 
> It would take an army of engineers to use a chip like that. That would
> need a giant market.

Not something special, just a very good datasheet (?). Others just split
this into numerous parts -- reference manuals, programmers' manuals, etc. It
is still as big as this one, just split into multiple parts. Some of those
parts are forgotten to put on their websites, some wrapped in numerous NDAs,
some forgotten to write at all soit makes very difficult to get the whole
picture. We are working with e.g. Rockchip RK3568 right now that is not any
simpler. There IS documentation but it is dispersed over numerous websites
so it takes a lot of effort to find a detailed manual on some parts and one
never knows where it can be found. No army of engineers here, just requires
knowledge and expertise. Just remember, those are NOT el-cheapo
microcontrollers running some RTOS at most. Those are full-blown systems
that usually run Linux kernel which is an enormous thing in itself.

It is very good to have everything in one place. If you look at the TI's
documentation on their DSPs you'll find that it is even bigger. Just split
into tens of documents on particular subsystems so if you want to program
e.g. PWM you should search for a specific documents on PWM subsystem.

The real horror is NXP with their iMX8xyz. They have enormous datasheets (?
they usually called Reference Manuals while the datasheet only has pinouts
and electrical specs) with hundreds of pages copypasted from various IP
documents VERBATIM that takes a lot of space and almost absolutely useless.
Useless because they don't bother telling you how those IPs are built into
their devices, which signals are used, how these signals are mapped to other
parts and package pins, how they can be accessed by the software (register
mapping) and so on. Their documents are enormous with half of their bulk is
totally useless and many parts are missing at all. And nobody there has any
knowledge of those. Everything was great while it was Freescale but turned
to total disaster when they were acquired by NXP.

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