EEVblog #1132 - The 3 Cent Microcontroller! - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: October 10, 2018, 09:50:51 pm
content: Taking a look at a sub 3 cent microcontroller, and other obscure Chinese manufactures, how to find them, and were to get them in stock.http://www.padauk.com.twhttps://lcsc.com

author: MT
author_rank: Super Contributor
timestamp: October 10, 2018, 10:39:27 pm
content: If it can replace a 555 its all chicken dinner!All kind of oddbal manufacturers there, i actually is looking for SPDT analog switch sot23-6 5V from the regular channels, Farnell dosent even sell such a thing but found one on Taiwan LCSC.https://lcsc.com/product-detail/Analog-Switches_BL1551_C82528.html

author: ucanel
author_rank: Regular Contributor
timestamp: October 10, 2018, 10:46:39 pm
content: I agree you need to do a project with it,i would like to help.

author: woox2k
author_rank: Regular Contributor
timestamp: October 10, 2018, 11:12:50 pm
content: Yes show us how easy or frustrating it is to build a project with it!

author: Nusa
author_rank: Super Contributor
timestamp: October 10, 2018, 11:44:49 pm
content: Do they cost more to ship than they do to buy?

author: nathanpc
author_rank: Unknown
timestamp: October 10, 2018, 11:50:51 pm
content: Watching Dave try to build a simple project with one of these MCUs is going to be priceless. I've always wanted to give them a try just for fun. Has anyone here ever tried one of these?That IDE looked a bit outdated, but it has a lot of functions that would be nice, specially for ARM development where you have to set a billion registers to setup peripherals the way you want. By the looks of it these MCUs are almost always used for simple tasks and the developers just use the generated code and modify it slightly to fit the application.

author: drussell
author_rank: Super Contributor
timestamp: October 11, 2018, 12:51:07 am
content: Quote from: Nusa on October 10, 2018, 11:44:49 pmUnder most circumstances, yes.

author: xl0
author_rank: Newbie
timestamp: October 11, 2018, 01:26:53 am
content: Sorry to burst the bubble, but that's not the real price. How do we know?- The price is much lower than for comparable Chinese / Taiwanese micros.- Nobody else in Shenzhen is selling them. Yes, you can not buy this thing in Shenzhen, only lcsc has 500 in stock, and that's nothing.It looks like lcsc (The large go to distributor in Shenzhen) gave Paduk (a very small and relatively new Taiwanese mcu designer) a try and bought a bunch of their parts in 1K quantity. Now they are selling them off just to clear the inventory.If you want cheap micros that are going to be available for the same price in the foreseeable future, try Holtek and STC. Holtek is Taiwanese and they have very decent English documentation and tools. STC is Chinese and used to have a Chinese-only website that would give regular visitors eye cancer. I see they updated the website and now have an English version. They are even translating the datasheets, but expect a rougher experience.In any case, the cheapest Holtek HT48R002 OTP micro is just 9 cents on lcsc, and you can get it for 6 in reasonable quantity in Shenzhen. Yes, it's still very cheap, but not 3 cents in quantity of 10 cheap.

author: SiliconFrog
author_rank: Newbie
timestamp: October 11, 2018, 02:26:18 am
content: Id really like to see him have a go at the cheap microcontrollers as well. I have also heard that the Holtek ones are the best to try as they have been around for a while, noted for being the cheap ones and where some brave folk have had a go. I think the data sheets used to all be in kanji but have better english transcription now.It would be interesting to see it programmed in pure assembly instead of the odd asm/C hybrid. And also good to know if they can be programmed using some bit bashing from the IO of something else like a PIC / Arduino / Raspberry or similar instead of using a special custom programmer.Also:QuoteProbably but recall that lcsc is part of the jlcpcb group so if you get some PCBs made and pay for their shipping then you can get components from this supplier tacked on to the same shipping consignment. I have done this and got "free" shipping of the components for an old jlcpcb board.See:https://support.lcsc.com/article/24-do-you-offer-combine-shipment-with-pcbs

author: Bud
author_rank: Super Contributor
timestamp: October 11, 2018, 02:37:03 am
content: The IDE probably does not have that compile menu rubbish, instead it may write directly to the programmer.

author: NiHaoMike
author_rank: Super Contributor
timestamp: October 11, 2018, 04:55:58 am
content: Quote from: xl0 on October 11, 2018, 01:26:53 amHow likely would that company still be in business in the near future? Maybe the chips would become super valuable in 30 years or so.

author: GigaJoe
author_rank: Frequent Contributor
timestamp: October 11, 2018, 05:10:39 am
content: Dave, really ...

author: VEGETA
author_rank: Super Contributor
timestamp: October 11, 2018, 05:39:58 am
content: They have other stuff that are super cheap (at quantity of 1):DAC:dual-channel 24-bit DAC (0.25$):https://lcsc.com/product-detail/Analog-To-Digital-Converters-ADCs_HX710C_C124156.htmldual-channel 24-bit DAC (0.32$):https://lcsc.com/product-detail/Analog-To-Digital-Converters-ADCs_HX712_C118237.htmldual-channel 16-bit DAC (0.12$):https://lcsc.com/product-detail/Digital-To-Analog-Converters-DACs_TM8211_C92003.htmldual-channel 16-bit DAC (0.12$):https://lcsc.com/product-detail/Digital-To-Analog-Converters-DACs_PT8211-S_C92004.htmlADC:dual-channel 24-bit ADC (0.25$):https://lcsc.com/product-detail/Analog-To-Digital-Converters-ADCs_HX710C_C124156.htmldual-channel 24-bit ADC (0.33$):https://lcsc.com/product-detail/Analog-To-Digital-Converters-ADCs_HX720_C126715.htmldual-channel 24-bit ADC (0.52$):https://lcsc.com/product-detail/Analog-To-Digital-Converters-ADCs_HX710A_C68417.htmldual-channel 16-bit DAC (0.79$):https://lcsc.com/product-detail/Analog-To-Digital-Converters-ADCs_TM7705_C84305.htmlWhile these prices are literally order of magnitudes of impossible at digikey... here is the question: are these reliable and for real?I mean, are 24-bit ADCs listed above really does what it claims?! then why will we buy significantly more expensive ones?

author: xl0
author_rank: Newbie
timestamp: October 11, 2018, 07:16:24 am
content: Yeah, HX710 and others are legit. But they are digital scale ADCs, not general purpose ones.

author: Psi
author_rank: Super Contributor
timestamp: October 11, 2018, 07:19:01 am
content: Can you load code into ram over debug then run it, or do you have to brick one IC every time to try your code?

author: oPossum
author_rank: Super Contributor
timestamp: October 11, 2018, 07:20:38 am
content: I suspect it is strict Harvard architecture, so no execution from RAM.

author: Nusa
author_rank: Super Contributor
timestamp: October 11, 2018, 07:27:39 am
content: There's only 64 bytes of ram on the thing anyway. You pretty much have to put the program in the 1K words of rom.

author: VEGETA
author_rank: Super Contributor
timestamp: October 11, 2018, 08:18:34 am
content: Quote from: xl0 on October 11, 2018, 07:16:24 amMeaning I cannot use them for in a lab power supply design? why?

author: EEVblog
author_rank: Unknown
timestamp: October 11, 2018, 08:24:26 am
content: Quote from: xl0 on October 11, 2018, 01:26:53 amDo you have any evidence of that? Or are you just speculating?As for new, 2005, so been around 13 yeras.http://www.padauk.com.tw/en/about/index.aspx?kind=9

author: coppice
author_rank: Super Contributor
timestamp: October 11, 2018, 08:31:25 am
content: Quote from: VEGETA on October 11, 2018, 08:18:34 amThe problem with these devices for many uses is their DC offset. The DC offset in most sigma delta ADCs is not great, and may drift around with temperature and power conditions. In weight scale applications you can measure and subtract the offset each time you start the scale, and assume the temperature, and other factors which can cause the DC offset to drift, won't change too much before the scale is reset again. If you do not have a practical scheme like that for calibrating away the offset, the ADC might not be for you.

author: xl0
author_rank: Newbie
timestamp: October 11, 2018, 08:52:45 am
content: Quote from: EEVblog on October 11, 2018, 08:24:26 amJust speculating.Quote from: EEVblog on October 11, 2018, 08:24:26 amYou are right, not that new.

author: VEGETA
author_rank: Super Contributor
timestamp: October 11, 2018, 09:47:25 am
content: Quote from: coppice on October 11, 2018, 08:31:25 amAha, what about the other ADCs\DACs listed aside from those? I mean the 16 bit ones as they seem so cheap and there is nothing in their datasheet to indicate for weight scale application specific.

author: Kjelt
author_rank: Super Contributor
timestamp: October 11, 2018, 09:55:45 am
content: We will see if the stock is restocked we will know the answer.In the past I had a similar experience with a chinese seller who sold STM32 microcontrollers for $0,80.I ordered 100 pieces and he sent and billed me 34 pieces.I asked him when the other 66 pieces would be shipped and he answered never, out of stock.At my further inquiries he admitted purchasing a leftover reel in the past with couple of hundred pieces left and just offers what he has.LCSC looks like a big company so I am really interested to see how this turns out.

author: janekm
author_rank: Unknown
timestamp: October 11, 2018, 12:52:35 pm
content: Quote from: xl0 on October 11, 2018, 01:26:53 amActually there are at least two other distributors in SZ and Padauk have an official distributor with full app engineer support in SZ (who can also do pre-"flashed" chips).I do suspect the price could go up if the part gets very popular... ST pulled that trick with STM8 before.

author: janekm
author_rank: Unknown
timestamp: October 11, 2018, 01:28:25 pm
content: BTW there "multi core" chips are also very interesting... they are why I got talking to Padauk in the first place. What they are is essentially a single core but it can task-switch between multiple tasks on every execution cycle (so it must have multiple register and PC sets). Which can be very useful for protocol conversion as you could bitbang multiple protocols at once. Their other advertised use case is for motor controllers (and it looks like they have a pre-programmed chip for that application).

author: janekm
author_rank: Unknown
timestamp: October 11, 2018, 01:32:27 pm
content: Also the power consumption figure Dave skimmed over was actually for executing code from the LF clock... which is pretty impressive. There could be some good use cases for that like low power sensor monitoring.

author: maxpayne
author_rank: Regular Contributor
timestamp: October 11, 2018, 04:11:00 pm
content: Is there any other Chinese/Taiwanese Digikey site like this one ?

author: Whales
author_rank: Super Contributor
timestamp: October 11, 2018, 04:53:04 pm
content: Dave:while you're at it, hedge your bets and grab the programmer for a few other brands too. If this one doesn't pan out ("oh the IDE is free, but compiler costs $2K and we only tell you if you ask") then you'll have some other options.You may also want to make a little finger-pressure adapter board for test programming the OTPs. Use a large, unconnected SMD resistor to make a 'wall' that you slide the components up against with your finger. Next to this place the ENIG pads the part is held against.The SMD resistor should have its dimensions reasonably specced, make sure to make the pads tight too. Put three duplicates of this circuit on a board with a tiny variation in resistorwall<->pads spacings to allow for tolerances when you use it IRL.It's also worth wiring an unused pin on the pads to an LED+R for a quick-n-dirty self-test of your code writes. Even if you don't end up using it.Alternatively you might plan to do emulation + in-circuit programming from the start. YMMV.

author: IanMacdonald
author_rank: Frequent Contributor
timestamp: October 11, 2018, 06:20:50 pm
content: Just a small point Dave, but if you have your computer set to run executables that are clicked-on without even asking for confirmation, then you are at high risk from drive-bys.Point of fact I would check all such software on VirusTotal. and/or run it in a virtual machine, at least until I was sure it was OK.

author: Jope
author_rank: Regular Contributor
timestamp: October 11, 2018, 10:55:56 pm
content: They also have cheap Cortex-M0 MCUs in a TSSOP8 package:https://lcsc.com/product-detail/Synwit_SWM050I2P7-65_C111818.htmlAnd somebody on hackaday.io has already made a development board for it:https://hackaday.io/project/161300-swm050-development-board

author: mrpackethead
author_rank: Super Contributor
timestamp: October 12, 2018, 06:59:50 am
content: Dave can you master your audio so its sitting closer to the Youtube reference level/.. .this one is -7.1db down, so its really quite quiet.

author: EEVblog
author_rank: Unknown
timestamp: October 12, 2018, 08:35:32 am
content: Quote from: mrpackethead on October 12, 2018, 06:59:50 amAnd what exactly is that reference level, everyone seems to have their own idea.

author: mrpackethead
author_rank: Super Contributor
timestamp: October 12, 2018, 09:18:35 am
content: Quote from: EEVblog on October 12, 2018, 08:35:32 amThe reference level that matters for sending to youtube is youtube reference level. If you check on your video ( right click, -stats for nerds ) it will show you what your program loudness is. In the case of your video you are -7.1db down. You dont' want to start going over the reference level becuae then Youtube does nasty normalisation of your audio. ( not compression, but normalisation ).You want to target -13LUFS for Youtube ( loudness Units before Full Scale ). You can measure that with a 'Loudness' Meter which is often a plug in in many of the video/audio editing suites.

author: G0MJW
author_rank: Regular Contributor
timestamp: October 12, 2018, 10:18:51 am
content: How about a simple project using that font chip as well to send (say) serial data received on one port to a graphic LCD on another?

author: G0MJW
author_rank: Regular Contributor
timestamp: October 12, 2018, 10:21:07 am
content: Quote from: mrpackethead on October 12, 2018, 09:18:35 amI am not sure but you are noticeably quiet. Perhaps go for the BBC World Service ideal of 100% peaks and a high compression ratio? Would help the elderly amongst us too who went to too many rock concerts in their youth.

author: Jebnor
author_rank: Regular Contributor
timestamp: October 12, 2018, 04:20:52 pm
content: Quote from: GigaJoe on October 11, 2018, 05:10:39 amThere are more 4¢ OTP Micros @GigaJoe.https://lcsc.com/product-detail/Microprocessor-Microcontroller_Bojuxing-Industry-BJ8P509FNB_C83513.html

author: thm_w
author_rank: Super Contributor
timestamp: October 12, 2018, 08:33:39 pm
content: Quote from: G0MJW on October 12, 2018, 10:21:07 amHave you tried this:https://pureinfotech.com/normalize-sound-volume-windows-10/

author: drussell
author_rank: Super Contributor
timestamp: October 15, 2018, 02:44:16 pm
content: Quote from: thm_w on October 12, 2018, 08:33:39 pmThat doesn't help Dave get the audio level correct in his videos in any way.

author: thm_w
author_rank: Super Contributor
timestamp: October 15, 2018, 07:37:33 pm
content: Quote from: drussell on October 15, 2018, 02:44:16 pmNever said it would, notice I am responding to a quote from G0MJW.Last time I checked, volume normalization on my TV worked incredibly well. If you can't get TV producers to have consistent volume (see all the loud ads they had for years), then do you expect all of youtube to achieve the same?

author: timelessbeing
author_rank: Frequent Contributor
timestamp: October 16, 2018, 05:51:06 am
content: Quote from: xl0 on October 11, 2018, 01:26:53 amThanks Dave. They are gone now

author: Sjaak
author_rank: Contributor
timestamp: October 16, 2018, 06:36:16 am
content: QuoteI'm that guy and Dave beat me at writing about the .03$ chip.The whole writeup about the arm chip is at my blog, including how to program it. The link to the post ishttp://smdprutser.nl/blog/the-arm-chip-that-wont-cost-an-arm-and-a-leg/i also have some chips (which are sold out at lcsc.com) and breakoutboards available.Edit: included quote

author: VEGETA
author_rank: Super Contributor
timestamp: October 16, 2018, 08:00:09 am
content: Quote from: Sjaak on October 16, 2018, 06:36:16 amI don't know what IDE and programmer is used with these things.However, I assume they will be usable to everyone once someone includes them in Arduino IDE.... I really hope this happens.

author: Sjaak
author_rank: Contributor
timestamp: October 16, 2018, 08:47:37 am
content: Quote from: VEGETA on October 16, 2018, 08:00:09 amOn my github there is a Makefile, crt0.s and library file to write your first program. It uses the gcc-arm-none-eabi toolchain. Yu can program it with the blakcmagic probe (use my firmware) or a J-link Segger.Don't think this chip is suitable for the arduino crowd..

author: VEGETA
author_rank: Super Contributor
timestamp: October 17, 2018, 05:24:44 am
content: Quote from: Sjaak on October 16, 2018, 08:47:37 amIt is one time programmable, so yes it won't suite arduino people. However, using arduino ide and libraries will make it significantly easier. The only microcontroller that I dealt with directly is PIC. I have an avr programmer that works perfectly and a pickit3.I don't know of any easy method to program these devices, especially how to know if the program works before burning it to the chip itself.

author: Sjaak
author_rank: Contributor
timestamp: October 17, 2018, 04:21:44 pm
content: Quote from: VEGETA on October 17, 2018, 05:24:44 amhave you read the links I posted?

author: VEGETA
author_rank: Super Contributor
timestamp: October 17, 2018, 07:10:21 pm
content: Quote from: Sjaak on October 17, 2018, 04:21:44 pmwhere?

author: timelessbeing
author_rank: Frequent Contributor
timestamp: October 18, 2018, 06:35:24 pm
content: Quote from: VEGETA on October 17, 2018, 07:10:21 pm

author: timelessbeing
author_rank: Frequent Contributor
timestamp: October 26, 2018, 09:48:16 am
content: Crazy. You can also find Panasonic electrolytics on LCSC for a fraction of what Digikey and Mouser charge. Shipping is the same.https://lcsc.com/product-detail/Others_PANASONIC_EEEFK1K470P_PANASONIC-EEEFK1K470P_C178556.htmlhttps://www.digikey.com/product-detail/en/panasonic-electronic-components/EEE-FK1K470P/PCE3831CT-ND/766207https://www.mouser.com/ProductDetail/667-EEE-FK1K470P

author: Smokey
author_rank: Super Contributor
timestamp: October 26, 2018, 09:59:18 am
content: Has anyone found a single Padauk chip in the wild in an actual product? If they have been around for 13 years there has to be some out there.

author: Kjelt
author_rank: Super Contributor
timestamp: October 26, 2018, 10:09:39 am
content: Quote from: timelessbeing on October 26, 2018, 09:48:16 amNote the stock differences, digikey has over 100000 pieces while lcsc has 300 , what do you think what happens if those 300 are sold out ?If you order 10000 pieces you probably get nothing.

author: mubes
author_rank: Regular Contributor
timestamp: October 26, 2018, 10:12:54 am
content: Quote from: Sjaak on October 16, 2018, 06:36:16 amGreat effort. Would you mind contacting the BlackMagic project to get your patches folded in upstream? PM me if you need to know how to do that, but its easiest to contact via Gitter.RegardsDAVE

author: timelessbeing
author_rank: Frequent Contributor
timestamp: October 26, 2018, 10:57:53 am
content: Quote from: Kjelt on October 26, 2018, 10:09:39 amI saw and I don't care. I need one, but at that price I'll order ten.

author: thm_w
author_rank: Super Contributor
timestamp: October 26, 2018, 08:13:57 pm
content: Quote from: Smokey on October 26, 2018, 09:59:18 amLooking at the LCSC page there appear to be no markings, which makes sense as that adds cost to the chip:https://lcsc.com/product-detail/PADAUK_PADAUK-Tech-PMS150C-U06_C168658.htmlThere are tons of products with unmarked 8-pin micros, so this could be one of them.

author: MK14
author_rank: Super Contributor
timestamp: October 26, 2018, 08:47:20 pm
content: Quote from: thm_w on October 26, 2018, 08:13:57 pmLCSC seem to be just using blank component images, to make their website easier/quicker/cheaper to implement and maintain.You can see thier logo, on the chips below.

author: nctnico
author_rank: Super Contributor
timestamp: October 26, 2018, 11:10:25 pm
content: A short comment about the 0 to X MHz in the datasheet which seemed a surprise. Actually this is an important parameter to know about. It means you can shut the clock down completely without problems. Not all processors allow shutting the clock down!

author: Sjaak
author_rank: Contributor
timestamp: October 27, 2018, 02:18:40 pm
content: Quote from: mubes on October 26, 2018, 10:12:54 amI send a pull request, but need to rebase/merge some things first.

author: cowasaki
author_rank: Frequent Contributor
timestamp: October 28, 2018, 10:04:49 am
content: Have I missed it or has anyone found a comparative table of all the Paduak microcontrollers? Would be interesting to see what they all have. Need to have a look through the data sheets as well but this looks really good

author: Nusa
author_rank: Super Contributor
timestamp: October 28, 2018, 10:39:55 am
content: Quote from: cowasaki on October 28, 2018, 10:04:49 amYou mean like their own literature?http://www.padauk.com.tw/en/product/method.aspx?num=1

author: cowasaki
author_rank: Frequent Contributor
timestamp: October 28, 2018, 12:23:31 pm
content: Quote from: Nusa on October 28, 2018, 10:39:55 amYep, that might do it :-)Thanks

author: thm_w
author_rank: Super Contributor
timestamp: October 29, 2018, 07:58:02 pm
content: Quote from: MK14 on October 26, 2018, 08:47:20 pmLCSC are very good at showing the image of the chip in question, for example:https://lcsc.com/product-detail/DC-DC-Converters_TI_TPS61040DBVR_TPS61040DBVR_C7722.htmlThey may mark the larger pin chips as the cost of those is higher.

author: MK14
author_rank: Super Contributor
timestamp: October 30, 2018, 05:18:23 am
content: Quote from: thm_w on October 29, 2018, 07:58:02 pmYour're right. Many of the ICs and stuff on LCSC, does seem to have the correct/actual photograph, complete with actual part number.So I'm NOT sure, if the 3 cent micros, are labeled or not. But since the LCSC seems to show no marking on the chip, you could easily be right.(Changing the subject a bit), as well as cutting costs to save on printing the label. I'm surprised that, at only 3 cents, the micros are packaged. I.e. at only $0.03 each, I would have thought they would have to be COB dies (i.e. Chip On Board).

author: ebclr
author_rank: Super Contributor
timestamp: October 31, 2018, 11:35:47 pm
content: 2 models MTPPFS5154 and PFC154, those can be good for developments

author: tchicago
author_rank: Regular Contributor
timestamp: November 08, 2018, 07:46:31 pm
content: It is interesting that all explorations that Dave & Dave did on Padauk 3c controllers are now being reposted on various Russian blogs and forums without giving any credit to eevblog

author: Smokey
author_rank: Super Contributor
timestamp: November 09, 2018, 04:50:14 am
content: Quote from: tchicago on November 08, 2018, 07:46:31 pmRussia/Padauk meddling to influence my next Digikey purchase!

author: spth
author_rank: Regular Contributor
timestamp: November 19, 2018, 04:14:20 pm
content: Quote from: xl0 on October 11, 2018, 01:26:53 amDon't forget the STM8. ST may be a European company, but they still make very cheap µCs. Actually, it seems the STM8 are currently cheaper even at Digikey compared to LCSC.Philipp

author: janekm
author_rank: Unknown
timestamp: November 20, 2018, 07:21:29 am
content: Quote from: spth on November 19, 2018, 04:14:20 pmUsed to be cheap... For a while ST where price-dumping with STM8 to get a foot-hold with Chinese manufacturers. When they became popular they raised the price by a lot (30-50% more currently compared to the lowest price). Not surprisingly Nuvoton jumped in with a pin-compatible (but not code-compatible afaik) chip. Still even at their lowest price the STM8 was 8 times as expensive as the Padauk one...

author: spth
author_rank: Regular Contributor
timestamp: November 20, 2018, 10:20:45 am
content: Quote from: janekm on November 20, 2018, 07:21:29 amParts of ST are apparently attempting to move STM8 customers to the STM32, and have been doing so for quite a while. Maybe the price increase was part of that?Philipp

author: spth
author_rank: Regular Contributor
timestamp: December 18, 2018, 07:28:35 am
content: It looks like there is a second source for Padauk µCs:http://www.puolop.com/products/category/mid/2/sid/15.htmlSince Puolop have their own datasheets and part numbers, this doesn't look like a reseller. On the other hand, part numbers are similar enough to assume that they might be just clones. At a first glance it looks like the Puolop range is very similar to the Padauk OTP rangeIt seems LCSC only has a feww Puolop devices in stock, which does notinclude teh Puolop ow-end parts. So I don't know if Puolop could be a cheaper alternative to Padauk for those.Philipp

author: nick_d
author_rank: Regular Contributor
timestamp: December 18, 2018, 07:37:42 am
content: To work with OTP devices, in general you buy the windowed version to use in the lab, it is usually 10 times more expensive (30c? Ha ha) but you only need a few of them. For instance, I have several tubes of regular plastic packaged PIC12C508 and two of the same silicon in a fetching gold framed windowed package, you put them in the UV eraser to reuse. (Ah, memories...) I also did this with COP8SAC7, now I have several boxes containing hundreds of surplus OTP MCUs, but have lost the windowed parts and the debug module, searched for them in the factory a while ago with no luck. Perhaps an etch job is called for, or sell them @ 3c??cheers, Nick

author: spth
author_rank: Regular Contributor
timestamp: December 20, 2018, 07:50:29 am
content: Quote from: spth on December 18, 2018, 07:28:35 amHaving a second quick look at Puolop ist seems to me:Puolop is cloning most 1-core and 2-Core OTP Padauk devices. Datasheets seem identical even down to version number and dates in the Changelog.Unlike Padauk, Puolop does not offer Flash or 8-Core devices.Recently, Puolop is making their own 1-Core OTP devices based on the Padauk architecture (e.g. the PTBO164SX, first and so far only version of datasheet from 2017, does not seem to have a Padauk equivalent).Philipp