DJ🌞

@[email protected]
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I break things and void warranties. Encryption extremist. Adversarial archivist. 100% no-LLM pure-organic BS.
Fun fades, but irritation is infinite.
⚠️Private account. All toots are licensed under the MIT license.
#NoBridge
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Bloghttps://dev-zzo.github.io/blarg/
Patreonhttps://patreon.com/NakedSilicon
Show threadDJ🌞1d ago

Next up is removing the top metal layer, which if memory serves is a thick 3um one. Thread will update when that's done.

Until then, I wish you all a great Friday and the weekend too!

Show threadDJ🌞1d ago

Capacitors seem to be purple.

Also in the frame is one chonky resistor...

Show threadDJ🌞1d ago
The green colours seem to be of poly resistors. The setup struggles to resolve them through all the layers.
Show threadDJ🌞1d ago
While I don't know the specifics, the device certainly has 6 functional units of the same type distributed along the 3 out of 4 edges. The top right corner houses 3 instances of a different unit, along with at least two more of a yet different one. And if memory serves, the centre was occupied by a blob of digital logic.
Show threadDJ🌞1d ago
Die ID marking in the corner lets us know this is an MP091A0, designed in 2021. 5 metal layers, all revision 1 it seems.
DJ🌞1d ago

Hello and welcome to this #nakeddiefriday installment.

Today's guest is an NXP chip for which I do not have the part number in memory. The chip was used as a training target for the sample preparation tutorial section by Chris Pawlowicz of TechInsights at HARRIS'26, in which I had the pleasure to participate. I have an intact sample which I plan to deprocess at home during the coming days and hopefully apply all I've learned there.

Full-res map for you to explore: http://infosecdj.net:8086/map/nxp/mp091a0/infosecdj_mz_nikpa60x_s0/

Image taken using Nikon PlanApo 60x/1.40, 3260 focus-stacked tiles of 21 individual shots.

#electronics #reverseengineering #microscopy

DJ🌞4d ago
Andrea Barisani4d ago

We ported TamaGo to the Microchip LAN969x SoC.

A collaboration with Novarq to support the Tactical 1000 network switch.

Having bare metal Go on a network switch is an exciting context which opens up many development opportunities!

Check their blog post:

https://novarq.com/blogs/insights/beyond-linux-bare-metal-go-on-tactical-1000-with-tamago

Show threadDJ🌞Mar 20

For the infinitely curious.

Metal 2: http://infosecdj.net:8086/map/samsung/smartcard02/infosecdj_my_nikpa60x/

Metal 1: http://infosecdj.net:8086/map/samsung/smartcard02/infosecdj_mx_nikpa60x/

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DJ🌞Mar 20
DJ🌞Mar 20

Hello and welcome to the #nakeddiefriday again. This one will be a continuation of the previous one with the same exhibit but in more depth. :-)

To remind you, this is the unnamed smartcard IC, which I believe was fabbed by Samsung.

Let's try removing some metal from the top. 🧵

#electronics #reverseengineering #smartcard

Show threadDJ🌞Mar 20

Aaand there is no next deprocessing step, because I managed to lose this sample too while trying to get metal-1 off. Thus, the thread ends here. This made me very sad, and pointed to an obvious area needing improvement in my process.

I hope you enjoyed looking at the construction of a more complex chip in detail as much as I did taking these images. As always, I will appreciate any and all support to offset the costs of consumables required to do this work.

I wish you all a great end of this week. Stay safe, stay healthy, and I hope to see you all next Friday.