#nakeddiefriday — Public Fediverse posts

Greetings. This is #nakeddiefriday and today I got one on a reader's request.

I was kindly provided with the ASIC chip from the new #Lego Smart Brick. It is the one marked DA000001-04, which nobody really knows what it is and who made it. There were suggestions it was made by Dialog but no solid evidence AFAIK.

The first image is with the die intact. You can see a ball pad array on the redistribution layer. RDL is made from polyimide with copper traces, not unlike flex PCBs. It is bonded to the silicon die pads on the perimeter. Unfortunately, RDL considerably obscures the die.

Full-res map: http://infosecdj.net/map/csem/da000001-04/infosecdj_mz_nikpa40x/ (layered)

1/n

#electronics #reverseengineering #icre

Good day to you! It is the first day of May here in Copenhagen, it is Friday, and it is hot like summer. This means, it is a good day for #nakeddiefriday so without further ado, here it is.

This is one Zilog Z765APS, a floppy disk controller chip of 1984 vintage made in NMOS. This one is very similar to NEC uPD765A; I am not sure if Zilog licensed the maskwork. What I find particularly interesting about this one is a relatively huge microcode ROM on the left side of the die. Wouldn't it be interesting to learn what they needed so much code for?

Let's experiment a bit: how about you guys scroll around the die and post the snippets you found most interesting in the comments below? We can discuss later.

Full-res map for an in-depth look: http://infosecdj.net/map/zilog/z765aps/infosecdj_mz_nikpa40x_50p/

#electronics #retrocomputing #reverseengineering #microscopy

Good day to you! It is the first day of May here in Copenhagen, it is Friday, and it is hot like summer. This means, it is a good day for #nakeddiefriday so without further ado, here it is.

This is one Zilog Z765APS, a floppy disk controller chip of 1984 vintage made in NMOS. This one is very similar to NEC uPD765A; I am not sure if Zilog licensed the maskwork. What I find particularly interesting about this one is a relatively huge microcode ROM on the left side of the die. Wouldn't it be interesting to learn what they needed so much code for?

Let's experiment a bit: how about you guys scroll around the die and post the snippets you found most interesting in the comments below? We can discuss later.

Full-res map for an in-depth look: http://infosecdj.net/map/zilog/z765aps/infosecdj_mz_nikpa40x_50p/

#electronics #retrocomputing #reverseengineering #microscopy

Good day to you! It is the first day of May here in Copenhagen, it is Friday, and it is hot like summer. This means, it is a good day for #nakeddiefriday so without further ado, here it is.

This is one Zilog Z765APS, a floppy disk controller chip of 1984 vintage made in NMOS. This one is very similar to NEC uPD765A; I am not sure if Zilog licensed the maskwork. What I find particularly interesting about this one is a relatively huge microcode ROM on the left side of the die. Wouldn't it be interesting to learn what they needed so much code for?

Let's experiment a bit: how about you guys scroll around the die and post the snippets you found most interesting in the comments below? We can discuss later.

Full-res map for an in-depth look: http://infosecdj.net/map/zilog/z765aps/infosecdj_mz_nikpa40x_50p/

#electronics #retrocomputing #reverseengineering #microscopy

Good day to you! It is the first day of May here in Copenhagen, it is Friday, and it is hot like summer. This means, it is a good day for #nakeddiefriday so without further ado, here it is.

This is one Zilog Z765APS, a floppy disk controller chip of 1984 vintage made in NMOS. This one is very similar to NEC uPD765A; I am not sure if Zilog licensed the maskwork. What I find particularly interesting about this one is a relatively huge microcode ROM on the left side of the die. Wouldn't it be interesting to learn what they needed so much code for?

Let's experiment a bit: how about you guys scroll around the die and post the snippets you found most interesting in the comments below? We can discuss later.

Full-res map for an in-depth look: http://infosecdj.net/map/zilog/z765aps/infosecdj_mz_nikpa40x_50p/

#electronics #retrocomputing #reverseengineering #microscopy

Good day to you! It is the first day of May here in Copenhagen, it is Friday, and it is hot like summer. This means, it is a good day for #nakeddiefriday so without further ado, here it is.

This is one Zilog Z765APS, a floppy disk controller chip of 1984 vintage made in NMOS. This one is very similar to NEC uPD765A; I am not sure if Zilog licensed the maskwork. What I find particularly interesting about this one is a relatively huge microcode ROM on the left side of the die. Wouldn't it be interesting to learn what they needed so much code for?

Let's experiment a bit: how about you guys scroll around the die and post the snippets you found most interesting in the comments below? We can discuss later.

Full-res map for an in-depth look: http://infosecdj.net/map/zilog/z765aps/infosecdj_mz_nikpa40x_50p/

#electronics #retrocomputing #reverseengineering #microscopy

Hellooooo, I see it is #nakeddiefriday today, so here goes.

This one is the MC33592FTA by Motorola/Freescale, a RF receiver chip built on a 2-met polysilicon gate CMOS process. The die is rather on the small side, consider the size of bonding pads in relation to the overall area.

Full-res map: http://infosecdj.net/map/motorola/mc33592fta-l97p/infosecdj_mz_nikpa60x/

#electronics #reverseengineering #microscopy

Hi! A little bit late in the day, but #nakeddiefriday is still happening today.

And today's exhibit is TC8568AM by Toshiba. This is a VFO to be used in floppy disk controllers. This is made very prominent on the die itself. Interesting how such a discrete part was still made in early 90s, where I kind of expected them to be replaced by fully integrated parts. A really short thread will follow.

Full-res map: http://infosecdj.net/map/toshiba/tc8568am/infosecdj_mz_nikpa40x_66p/

Many thanks to @RueNahcMohr for supplying this sample!

#electronics #reverseengineering #microscopy

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

Hello, wonderful people. Taking a break is good, so I am taking a couple moments to write the #nakeddiefriday post of the week.

Today we have this interesting sample. Yes, it has certainly seen better days; been sitting in a queue for a real while now. This is again a smartcard chip without a name to it. I believe this to be fabbed by Samsung, and be rather old. The chip is built using poly-gate CMOS with 3 metal layers; later processes moved to a higher layer count.

#electronics #smartcards #reverseengineering

Hello! It's #nakeddiefriday today, and what I got for you is yet another smartcard chip. Please welcome an unnamed die marked K2D0A, fabbed by STMicro. This came from [REDACTED], used to [REDACTED]. The die oriented with power supply pads on top, so it's possible to figure out which die pads correspond to which module pads. Unusually enough, there are 6 pads bonded out; the function of the extra
pad is not known at this time-- certainly not VPP.

A short thread follows.

#electronics #reverseengineering #smartcards

Greetings and welcome to today's #nakeddiefriday installment.

Today's guest is a smartcard chip, for which I do not know the actual p/n -- only it's die marking: M7690-G1, by Infineon. This came from a SIM card. The chip had polyimide on top which had to be stripped off, hence the damage on some top metal.

Unfortunately, power distribution routing and CMP dummy fill obstructs the majority of the detail. 🧵

#electronics #reverseengineering #icre #smartcard

Which pad is which? #BSBACM edition.
First we trace out the power pads...

There are 52 bond pads and 48 pins, so 4 of those pads need to double up...

#ICRE #ICReverseEngineering #NakedDieFriday

Yo all, it is Friday now where I am, so might as well get the #nakeddiefriday thing going.

Today's guest is the famous NES PPU chip, RP2C07A by Ricoh. What's interesting about this particular sample is that it's very very dead. Many thanks to @root42 for supplying it!

As always, a short thread follows. Why not give this one a boost while you're here? :D

SiPron page for those hi-res maps we all love: https://siliconpr0n.org/archive/doku.php?id=infosecdj:ricoh:rp2c07a

Note the die is oriented the same way Visual 2C02 has it: https://www.nesdev.org/wiki/Visual_2C02

#electronics #reverseengineering #icre #failureanalysis

Yo all, it is Friday now where I am, so might as well get the #nakeddiefriday thing going.

Today's guest is the famous NES PPU chip, RP2C07A by Ricoh. What's interesting about this particular sample is that it's very very dead. Many thanks to @root42 for supplying it!

As always, a short thread follows. Why not give this one a boost while you're here? :D

SiPron page for those hi-res maps we all love: https://siliconpr0n.org/archive/doku.php?id=infosecdj:ricoh:rp2c07a

Note the die is oriented the same way Visual 2C02 has it: https://www.nesdev.org/wiki/Visual_2C02

#electronics #reverseengineering #icre #failureanalysis

Yo all, it is Friday now where I am, so might as well get the #nakeddiefriday thing going.

Today's guest is the famous NES PPU chip, RP2C07A by Ricoh. What's interesting about this particular sample is that it's very very dead. Many thanks to @root42 for supplying it!

As always, a short thread follows. Why not give this one a boost while you're here? :D

SiPron page for those hi-res maps we all love: https://siliconpr0n.org/archive/doku.php?id=infosecdj:ricoh:rp2c07a

Note the die is oriented the same way Visual 2C02 has it: https://www.nesdev.org/wiki/Visual_2C02

#electronics #reverseengineering #icre #failureanalysis

Yo all, it is Friday now where I am, so might as well get the #nakeddiefriday thing going.

Today's guest is the famous NES PPU chip, RP2C07A by Ricoh. What's interesting about this particular sample is that it's very very dead. Many thanks to @root42 for supplying it!

As always, a short thread follows. Why not give this one a boost while you're here? :D

SiPron page for those hi-res maps we all love: https://siliconpr0n.org/archive/doku.php?id=infosecdj:ricoh:rp2c07a

Note the die is oriented the same way Visual 2C02 has it: https://www.nesdev.org/wiki/Visual_2C02

#electronics #reverseengineering #icre #failureanalysis

Yo all, it is Friday now where I am, so might as well get the #nakeddiefriday thing going.

Today's guest is the famous NES PPU chip, RP2C07A by Ricoh. What's interesting about this particular sample is that it's very very dead. Many thanks to @root42 for supplying it!

As always, a short thread follows. Why not give this one a boost while you're here? :D

SiPron page for those hi-res maps we all love: https://siliconpr0n.org/archive/doku.php?id=infosecdj:ricoh:rp2c07a

Note the die is oriented the same way Visual 2C02 has it: https://www.nesdev.org/wiki/Visual_2C02

#electronics #reverseengineering #icre #failureanalysis