UC3 is Legacy

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Atmel Corporation

Atmel AVR 8- and 32-bit Microcontrollers What's Changed

http://www.atmel.com/System/whats_changed.aspx?Products=010%20Atmel%20AVR%208-%20and%2032-bit%20Microcontrollers

...

Product Selection Guide
(file size: 4.65 MB, 24 pages, revision A, updated: 11/2015)

http://www.atmel.com/Images/Atmel-45154-Product-Selection-Guide_Brochure.pdf (go to page 4, center, down and right a bit)

 

"Dare to be naïve." - Buckminster Fuller

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"UC3 is Legacy"

Has been for a while, I thought  ?

 

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I admit that I am getting old, crotchety and set in my ways., but I simply cannot cope with the bewildering range of ARM-based processors.
To me, there is *too* much choice in that area and a high risk that the model that suits my application today will not be available in 3 years time, hence requiring rework of hardware and software.
(quite a few of my past projects are supposed to have a 10+ year working life)

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Yes, There is an irony that MCUs like the 8051, have outlived some of the ARM cores claimed to replace it....

If you think choosing a long-term ARM is tricky, try selecting a Bluetooth module !

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Microchip Technology Thailand will be the third assembly site for UC3A1 and UC3C1 (TQFP-100) as of Nov'18.

SAM4L may be an alternate to UC3 as it's also in the affected parts list for this PCN.

Microchip Technology Inc

Microchip Technology

Product Change Notification - JAON-06LEME647 - 08 Aug 2018 - CCB 3497 Initial Notice: Qualification of MMT as an additional assembly site for selected Atmel products of 58.85K wafer technology available in 100L TQFP (14x14x1.0mm) package.

http://www.microchip.com/mymicrochip/NotificationDetails.aspx?pcn=JAON-06LEME647

...

Affected CPNs:

https://www.microchip.com/mymicrochip/Data/JAON-06LEME647/JAON-06LEME647_Affected_CPN_08082018.pdf?TimeStamp=8/8/2018%205:04:49%20PM

...

Estimated Qualification Completion Date:
November 2018

...

via http://www.microchip.com/mymicrochip/Reports.aspx?type=cpn&filter=uc3

 

Edit: 2nd URL

 

"Dare to be naïve." - Buckminster Fuller

Last Edited: Thu. Aug 9, 2018 - 12:07 AM
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So the ol' UC3 isn't quite dead yet if they are readying a third assembly site.  smiley  It looks like the UC3 has deeper market penetration than the naysayers here would have you believe. cheeky

Letting the smoke out since 1978

 

 

 

 

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uc3 is dead, long live the uc3

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digitalDan wrote:
  It looks like the UC3 has deeper market penetration than the naysayers here would have you believe.

It has often been opined that the only reason the UC3 lives on at all is because Atmel (and, thus, now  Microchip) have a few very large customers - probably automotive.

 

So any "catalogue" sales are just small fry - a by-product.

 

Also, Atmel based their touch controllers on the AVR32.

 

But it's all still just "maintenance" - no development.

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awneil wrote:
So any "catalogue" sales are just small fry - a by-product.
An instance of which is the UC3A3256S in Nitrokey Storage.

awneil wrote:
But it's all still just "maintenance" - no development.
Similar for the ecosystem.

There's the start of adding UC3 into MPLAB X (MPLAB PICkit 4 aWire)

 


https://github.com/Nitrokey/nitrokey-storage-hardware/blob/master/V1.3/Plots/NitrokeyV13%20(Component%20Positions).txt

https://www.nitrokey.com/

http://microchipdeveloper.com/pickit4:interface-pinouts

due to https://www.avrfreaks.net/forum/come-join-us-mplab-now-supports-avrs?page=3#comment-2527161

 

"Dare to be naïve." - Buckminster Fuller

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Product Change Notification - JAON-06LEME647 - 14 Feb 2019 - CCB 3497 Final Notice: Qualification of MMT as an additional assembly site for selected Atmel products of 58.85K wafer technology available in 100L TQFP (14x14x1.0mm) package.

...

 

Affected CPNs:

https://www.microchip.com/mymicrochip/Data/JAON-06LEME647/JAON-06LEME647_Affected_CPN_02142019.pdf?TimeStamp=2/14/2019%203:29:27%20PM

 

...

 

Estimated First Ship Date:
March 8, 2019 (date code: 1910)

 

...

 

Revision History:
...

February 14, 2019: Issued final notification. Attached the qualification report. Provided estimated first ship date on March 8, 2019. Updated the pre and post change summary table MSL classification for MMT site from MSL 1 and 2 to MSL 3. 

...

 

"Dare to be naïve." - Buckminster Fuller

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awneil wrote:
It has often been opined that the only reason the UC3 lives on at all is because Atmel (and, thus, now Microchip) have a few very large customers - probably automotive. So any "catalogue" sales are just small fry - a by-product.

 

The current stock levels at Digikey and other distributors would seem to disprove that theory.

Letting the smoke out since 1978

 

 

 

 

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Was curious about Mouser's stock levels of UC3C1 (one that's in today's PCN)

https://www.mouser.com/Search/Refine?Keyword=at32uc3c1

Well stocked with the following part re-ordered, though low quantity, with an ETA of tomorrow :

https://www.mouser.com/ProductDetail/Microchip-Technology-Atmel/AT32UC3C1512C-AUT?qs=sGAEpiMZZMto2ohCYbAIUZ7839IytRtCFpQDRiytWtY%3d

That one has a 3 week lead-time; lead-time for it at Digi-Key is 14 weeks and about 8 weeks at Microchip.

https://www.microchipdirect.com/product/AT32UC3C1512C?keywords=AT32UC3C1512C-AUT

(AU = TQFP, T = tray)

 

AT32UC3C1512C - Microcontrollers and Processors

 

"Dare to be naïve." - Buckminster Fuller

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This is just the first page of 5 that comes up when searching Digikey for "AT32UC3."  Somebody must be buying a lot of these "dead" chips for them to keep re-stocking like this.

 

 

 

Letting the smoke out since 1978

 

 

 

 

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digitalDan wrote:
to keep re-stocking like this.
Just playing devil's advocate but how do you know they are "re-stocking"? Those numbers could be a bunch of reels in a dusty box at the back of a warehouse that have been sitting there for the last 8 years because they over-estimated what the likely demand was going to be. I think the only way you could gauge the rate of sales would be to repeatedly check those figures and see how quickly they go down (until the point where they would then trigger a restock).

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clawson wrote:
Just playing devil's advocate but how do you know they are "re-stocking"?

I don't have the historical evidence to prove it but I was quite surprised when I saw the current stock levels yesterday.  I don't recall Digikey ever having more than 1000 pieces of any variant of the UC3 family.

Letting the smoke out since 1978

 

 

 

 

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Surely you could just ask Digikey, Mouser, ...

 

I am always terrified by the apparent stock levels of obsolete devices at Distributors.

If a popular memory chip has a pin-compatible cheaper, better replacement,   the old device will stay on the shelf.

 

If an obsolete MCU has no pin-compatible replacement,  there might be a scarcity value.    Buyers do not want to change inventory or seek new approvals.

 

This could mean that Digikey has shelves full of DIP parts that no one wants to buy.

Or they think that an EOL device might end up with an inflated scarcity value.    And buy up Microchip's stock cheaply.

 

The business model for a Distributor that matches supply and demand for fast moving products is good.

A Distributor with money tied up in obsolete stock is not so good.

 

David.

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Don't forget what caused the revival of this thread.  Mchip just brought a third site online for manufacturing these parts.  Who in their right mind would expand their manufacturing capability if the parts were not selling?

Letting the smoke out since 1978

 

 

 

 

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david.prentice wrote:
If an obsolete MCU has no pin-compatible replacement,  there might be a scarcity value.
Obsolete by EOL or obsolete by OBE?

Only some UC3 are EOL (likely models that couldn't meet a production rate requirement)

UC3 revision 3 (UC3C, UC3L, circa '09) FlashVaultTM (Secure State) has a recent alternative in Armv8-M TrustZone.

david.prentice wrote:
Buyers do not want to change inventory or seek new approvals.
... and designers and the ones in logistics don't want to re-qual a product due to obsolescence (MCU, compiler toolchain)

david.prentice wrote:
A Distributor with money tied up in obsolete stock is not so good.
Unless such a distributor is in the EOL/NRND market (their stock stored in cities with reduced cost)

An approximate two hour drive northwest :

https://www.ewinginc.com/stack?part=AT32UC3C1512C-AUT

oh ... 3 pages blush

 


TrustZone – Arm Developer

 

edit :

Our Practice on Product Longevity | Microchip Technology

 

"Dare to be naïve." - Buckminster Fuller

Last Edited: Mon. Feb 18, 2019 - 11:03 PM
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digitalDan wrote:
Who in their right mind would expand their manufacturing capability if the parts were not selling?
True though with growth in 32b MCU there will be pressure on package and test sites.

That PCN may exist for risk reduction.

 

wafer fab :

One alternative to UC3 is some SAM; another is PIC32 MX.

Searched for PIC32MX in Microchip PCN then on 'die' and 'wafer'.

Microchip may not have a wafer fab for PIC32MX; TSMC may wafer fab some PIC32MX.

 

"Dare to be naïve." - Buckminster Fuller

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The Olimex link below is unrelated to Atmel / UC3 but seems relevant nontheless.

Short story:

Olimex sells small Linux boards (& other stuff) and some of their boards is based around a now obsolete design (Alwinner A10), which was originallly designed for consumer level tablets.

Alwinner says it will restart it's production line for Olimex alone if Olimex buys 50k units and will have a lead time of 90 days.

 

Whole story:

https://olimex.wordpress.com/2014/11/27/how-long-olinuxino-with-allwinner-socs-will-be-produced-again-now-we-know-the-answer-forever/

Doing magic with a USD 7 Logic Analyser: https://www.avrfreaks.net/comment/2421756#comment-2421756

Bunch of old projects with AVR's: http://www.hoevendesign.com

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UC3 revision 3 (UC3C, UC3L, circa '09) FlashVaultTM (Secure State) has a recent alternative in Armv8-M TrustZone.

Two possible alternatives to UC3C :

MCUs Deliver Hardware-Based IoT Security | EE Times

by Nitin Dahad

10.17.18

...

Recognizing this, STMicroelectronics and NXP Semiconductors have both launched microcontrollers utilizing the Arm Cortex-M33 integrating TrustZone to enable greater IoT security.

...

[STM32L5, 90nm]

[LPC5500 series, 40nm, LPC55S69]

[secure boot, secure keys]

[ECC]

[USB Type-C, USB PD]

[-40C .. 125C]

[CMSIS-DSP]

...

A possible alternative to some UC3L is SAM L11.

World-Class, Award Winning SAM L10 and L11 Microcontroller Family | Microchip Technology

 

edit :

Low power cellular IoT - nordicsemi.com

Using TrustZone for Armv8-M

 

"Dare to be naïve." - Buckminster Fuller

Last Edited: Sun. Feb 17, 2019 - 02:08 PM
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Product Change Notification - JAON-22XFVI227 - 22 Jul 2019 - CCB 3871 Initial Notice: Qualification of MMT as an additional assembly site for selected Atmel products of 58.85K wafer technology available in 100L TQFP (14x14x1.0 mm) package.

...

 

Affected CPNs:

AT32UC3C1128C-AUR

AT32UC3C1128C-AUT

AT32UC3C1256C-AUR

AT32UC3C1256C-AURA0

AT32UC3C1256C-AUT

AT32UC3C1256C-AZR

AT32UC3C1256C-AZT

AT32UC3C1512C-AUR

AT32UC3C1512C-AUT

AT32UC3C1512C-AZR

AT32UC3C1512C-AZT

AT32UC3C164C-AUR

AT32UC3C164C-AUT

[some touch screen controllers]

 

...

 

Estimated Qualification Completion Date:
September 2019

 

...

MMT - Microchip Technology Thailand

MSL 3 for the 14-Feb'19 PCN; MSL 1 for today's PCN.

IPC/JEDEC Moisture Sensitivity Levels

 


https://www.microchip.com/mymicrochip/Reports.aspx?type=cpn&filter=AT32UC3C1

 

"Dare to be naïve." - Buckminster Fuller

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MSL 3 for the 14-Feb'19 PCN; MSL 1 for today's PCN.

Per the following PCN's summary, bakeable trays are black in color (MSL 3); the non-bakeable trays are blue (MSL 1)

Product Change Notification - KSRA-23LPHB699 - 02 Aug 2019 - CCB 3845 and 3845.001 Final Notice: Implement new packing material (non-bakeable tray) for selected products available in 100L and 64L TQFP (14x14x1mm) packages at MMT assembly site

...

 

Affected CPNs:

[107 XMEGA]

AT32UC3A1512-AUR

AT32UC3A1512-AUT

AT32UC3A1128-AUT

AT32UC3A1256-AUT

AT32UC3A1128-AUR

AT32UC3A1256-AUR

AT32UC3C1128C-AUT

AT32UC3C1256C-AUT

AT32UC3C1512C-AUT

AT32UC3C164C-AUT

AT32UC3C1128C-AUR

AT32UC3C1256C-AUR

AT32UC3C1512C-AUR

AT32UC3C164C-AUR

AT32UC3C1256C-AURA0

...

 

Reason for Change:
To improve manufacturability and qualify new packing material (non-bakeable tray) in MSL 1 requirements

 

...

 

Estimated First Ship Date: 
September 02, 2019 (date code: 1936)

 

...

 

"Dare to be naïve." - Buckminster Fuller

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Another alternative though :

  • up to 100 pins instead of up to 144 pins
  • 256KB max flash instead of 512KB max
  • no floating point co-processor
  • no Ethernet MAC
  • not automotive (that's PSoC® 4)

32-bit Arm® Cortex®-M3 PSoC® 5LP (Cypress Semiconductor)

 

External access is disabled by OTP disabling the arm JTAG, arm SWD, arm SWV, and arm TRACEPORT (+5 pins); internal flash write access is optional (iow, bootloader can be enabled or disabled)

 

Can boost 0.5V to 5V at minimal current; core is 1.8V.

A discharged single cell primary alkaline or secondary NiMH can completely power this MCU.

A discharged single cell primary LiFeSO2 Li/FeS2 or secondary NiZn can power with some reserve.

 

arm instruction trace is available though couldn't locate a Cypress debugger with trace (so, SEGGER J-Trace or its competitors)

 


Cypress PSoC 5LP family powers high precision programmable analog with single-cell battery | embedded.com

PSoC® 5LP Cortex™-M3 SoCs - Cypress | Mouser

J-Trace Streaming Trace Probes | SEGGER - The Embedded Experts

Diagnosing Complex Memory Corruption Problems with Segger J-Trace – VisualGDB Tutorials

 

edit : automotive

edit2 : strikethru

 

"Dare to be naïve." - Buckminster Fuller

Last Edited: Mon. Aug 5, 2019 - 11:38 PM
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gchapman wrote:
A discharged single cell primary alkaline or secondary NiMH can completely power this MCU.
Finally an "perpetual energy" machine??

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laugh

Power that MCU for a wee while.

 

"Dare to be naïve." - Buckminster Fuller

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UC3 are no longer present in the most recent instance of Packs.

Microchip Packs Repository

versus

Atmel Packs

 

"Dare to be naïve." - Buckminster Fuller

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gchapman wrote:

UC3 are no longer present in the most recent instance of Packs.

Microchip Packs Repository

versus

Atmel Packs

 

 

... just means that MPLAB does not support UC3 devices... Atmel Studio looks at the atmel server, MPLAB looks at the microchip server. There's no 'most recent instance' between the two...

:: Morten

 

(yes, I work for Atmel, yes, I do this in my spare time, now stop sending PMs)

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"Dare to be naïve." - Buckminster Fuller

Last Edited: Mon. Sep 23, 2019 - 03:57 PM