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Microcontroller Reverse Engineer Technology

Atmel AT91SAM Series Successfully Hacked

 

Atmel produces a number of ARM based devices in their portfolio of products. We had one laying around the lab so here we go as usual…

 

The device was a 48 pin QFP type package. We also purchased a sample of the other members of the family although the initial analysis was done on the AT91SAM7S32 part shown above. All pictures will relate to this specific part even though there is not a signifigant difference between the other members of this line except memory sizes.

 

 

After decapsulating the die from inside the QFP, we find a beautifully layed out 210nm 5 metal design! Thats right, 5 metal layers! Strangely enough, we would have thought this was a 220nm 5 metal but apparently Atmel doesn’t have a .22um process so this is matching their .21um.

 

The core runs at 1.8v and allows 1.65v operation (thus it is their ATC20 process being used). The datasheet on the device can be found here. The 32KB Flash part also contains 8KB of SRAM (that’s a lot of ram!).

 

Notice on this particular layout, there is CMP filler metal (e.g. dead metal, metal slugs that are not connected to anything floating in SIO2) covering almost the entire die.

 

 

The picture above actually has had the top 2 metal layers removed. Metal 5 (M5) being the highest with the CMP filler and some power planes. Metal 4 (M4) had additional power planes and routing wires.

 

With Metals 1-3 still present, we can get a nice overview of the floorplan now. We can see the Flash, Fuses, and SRAM clearly. The Flash has a solid coating of metal over the entire cell area which has become common from Atmel to prevent UV light attacks we suppose?

 

 

We can now label the areas on the original top metal overview photo. There is a small boot-rom loader present on the device as well and is explained in the manual.

 

 

The picture above shows some of the bits of this ROM.

 

 

In the above picture lay the configuration fuses. Single cell’s of EEPROM type memory where any given cell can be set or cleared independently of another. Atmel layed them out very orderly as we see typically. It should be noted that these fuses are buried under 3 metal layers!

 

These cells were actually on Metal 1 and 2 but there are connections via Metal 3 as well.

 

There were additional power planes across the lower area of the photo from Metal 4 and 5 that cover those fuses however this isn’t buying them any security if the actual lock bits were buried there. A laser can go right through it all keeping the power-bus in tact with a hole in it.

 

 

Finally, the Atmel part number of this die. The CMP filler is visible in this picture too.

 

In summary, this is a very well secured device. Fuses buried in a 5 metal layer design make the Microchip DSPIC’s look like a piece of cake in comparision (They are 350nm 4 metal).

 

However, by the hard work of our Mikatech Team, below SAM series is now in our service list in june 2009:

 

AT91SAM9XE512 AT91SAM9XE256 AT91SAM9XE128 AT91SAM7S64B AT91SAM7S32B AT91SAM7SE512 AT91SAM7SE256 AT91SAM7SE32 AT91SAM7XC512 AT91SAM7XC256 AT91SAM7XC128 AT91SAM7X512 AT91SAM7X256 AT91SAM7X128 AT91SAM7S161 AT91SAM7S512 AT91SAM7S256 AT91SAM7S128 AT91SAM7S64 AT91SAM7S321 ...

 

  • Mikatech Atmel MCU reverse engineer list:
  • AT89xx whole series microcontroller crack: AT89C51 AT89C52 AT89S52 AT89S53 AT89S54 AT89S58 AT89S64 AT89C1051 AT89C2051 AT89C4051 AT89C55 AT89C55WD AT89C5131A AT89C51WD AT89C51ED2 AT89C51CC01 AT89S51 AT89C51CC02 AT89C51CC03 AT89C51RB2 AT89C51RC AT89C51RD2 AT89C51RD-CM AT89C51RC2 AT89C51ID2 AT87C5101 AT89C1051U AT89C2051X2 AT89C5130AM AT89C5130A AT89C5131AL AT89C5131AM AT89C51AC3 AT89C5132 AT89C51AC2 AT89C51CC03C AT89C51SND1C AT89C51CC03U AT89C51IC2 AT89C51RE2 AT89C51SND2 AT89LP2051 AT89LP2052 AT89LP213 AT89LP214 AT89LP216 AT89LP4051 AT89LP4052 AT89LP828 AT89LP428 AT89LS51 AT89LS52 AT89LV51 AT89LS53 AT89LS8252 AT89LV52 AT89LV55 AT89S2051 AT89S4051 AT89S8252 AT89S8253 ...

  • AT90xx whole series microcontroller crack: AT90S1200 AT90S2323 AT90S2343 AT90S2331 AT90S4433 AT90S8515 AT90S8535 AT90S4414 AT90S4434 AT90S2313 90S1200 90S2323 90S2343 90S2331 90S4433 90S8515 90S8535 90S4414 90S4434 90S2313 ...

  • AT90CAN/PWM/USB/xx whole series microcontroller read: AT90CAN32 AT90CAN64 AT90CAN128 AT90PWM2 AT90PWM216 AT90PWM2B AT90PWM3 AT90PWM316 AT90PWM3B AT90USB1286 AT90USB1287 AT90USB162 AT90USB646 AT90USB647 AT90USB82 ...
  • AT91SAMxx whole series microcontroller firmware crack: AT91SAM9XE512 AT91SAM9XE256 AT91SAM9XE128 AT91SAM7S64B AT91SAM7S32B AT91SAM7SE512 AT91SAM7SE256 AT91SAM7SE32 AT91SAM7XC512 AT91SAM7XC256 AT91SAM7XC128 AT91SAM7X512 AT91SAM7X256 AT91SAM7X128 AT91SAM7S161 AT91SAM7S512 AT91SAM7S256 AT91SAM7S128 AT91SAM7S64 AT91SAM7S321 ...

  • ATTinyxx whole series microcontroller firmware crack: ATtiny4 ATtiny5 ATtiny10 ATtiny11 ATtiny12 ATtiny13 ATtiny15 ATtiny20 ATtiny22 ATtiny24 ATtiny25 ATtiny26 ATtiny261 ATtiny28 ATtiny2313 ATtiny40 ATtiny4313 ATtiny43 ATtiny44 ATtiny45 ATtiny461 ATtiny48 ATtiny84 ATtiny85 ATtiny861 ATtiny87 ATtiny88 ATtiny4A ATtiny5A ATtiny10A ATtiny11A ATtiny12A ATtiny13A ATtiny15A ATtiny20A ATtiny22A ATtiny24A ATtiny25A ATtiny26A ATtiny261A ATtiny28A ATtiny2313A ATtiny40A ATtiny4313A ATtiny43A ATtiny44A ATtiny45A ATtiny461A ATtiny48A ATtiny84A ATtiny85A ATtiny861A ATtiny87A ATtiny88A ATtiny4V ATtiny5V ATtiny10V ATtiny11V ATtiny12V ATtiny13V ATtiny15V ATtiny20V ATtiny22V ATtiny24V ATtiny25V ATtiny26V ATtiny261V ATtiny28V ATtiny2313V ATtiny40V ATtiny4313V ATtiny43V ATtiny44V ATtiny45V ATtiny461V ATtiny48V ATtiny84V ATtiny85V ATtiny861V ATtiny87V ATtiny88V ...

  • ATMegaxx whole series microcontroller crack: ATmega16 ATmega162 ATmega164 ATmega165 ATmega168 ATmega169 ATmega128 ATmega1280 ATmega1281 ATmega2560 ATmega2561 ATmega328 ATmega48 ATmega32 ATmega324 ATmega325 ATmega3250 ATmega329 ATmega3290 ATmega64 ATmega640 ATmega645 ATmega6450 ATmega649 ATmega6490 ATmega8 ATmega88 ATmega8515 ATmega8535 ATmega16L ATmega162L ATmega164L ATmega165L ATmega168L ATmega169L ATmega128L ATmega1280L ATmega1281L ATmega2560L ATmega2561L ATmega328L ATmega48L ATmega32L ATmega324L ATmega325L ATmega3250L ATmega329L ATmega3290L ATmega64L ATmega640L ATmega645L ATmega6450L ATmega649L ATmega6490L ATmega8L ATmega88L ATmega8515L ATmega8535L ATmega16P ATmega162P ATmega164P ATmega165P ATmega168P ATmega169P ATmega128P ATmega1280P ATmega1281P ATmega2560P ATmega2561P ATmega328P ATmega48P ATmega32P ATmega324P ATmega325P ATmega3250P ATmega329P ATmega3290P ATmega64P ATmega640P ATmega645P ATmega6450P ATmega649P ATmega6490P ATmega8P ATmega88P ATmega16A ATmega162A ATmega164A ATmega165A ATmega168A ATmega169A ATmega128A ATmega1280A ATmega1281A ATmega2560A ATmega2561A ATmega328A ATmega48A ATmega32A ATmega324A ATmega325A ATmega3250A ATmega329A ATmega3290A ATmega64A ATmega640A ATmega645A ATmega6450A ATmega649A ATmega6490A ATmega8A ATmega88A ATmega8515A ATmega8535A ...

  • ATFxx series microcontroller crack: ATF16V8B ATF16V8BL ATF16V8BQ ATF16V8BQL ATF16LV8C ATF16LV8CEXT ATF16V8C ATF16V8CEXT ATF16V8CZ ATF20V8B ATF20V8BL ATF20V8BQ ATF20V8BQL ATF22LV10C ATF22LV10CEXT ATF22LV10CUES ATF22LV10CZ ATF22LV10CQZ ATV22V10 ATF22V10B ATF22V10BQ ATF22V10BL ATF22V10BQL ATF22V10C ATF22V10CEXT ATF22V10CUES ATF22V10CZ ATF22V10CQZ ATF22V10CZUES ATF22V10CQZUES ATF1500A ATF1500ABV ATF1500ABVL ATF1500 ATF1500L ATF1502AS ATF1502ASL ATF1502ASV ATF1502ASVL ATF1504AS ATF1504ASVL ATF1508 ATF1508AS ATF1508ASV ATF2500C ATF2500CL ATF2500CQ ATF2500CQL ATF750C ATF750CEXT ATF750CL ATF750LVC ATF750LVCCEXT ATF750LVCEXT ATF750LVCL ATV2500 ATV2500H ATV2500L ATV2500B ATV2500BL ATV2500BQL ATV5000 ATV5000L ATV750 ATV750B ATV750BL ATV750L ...

  • AT88scxx/90scxx series microcontroller crack: AT88SC0104 AT88SC0104C AT88SC0204 AT88SC0204C AT88SC0404 AT88SC0404C AT88SC0808 AT88SC0808C AT88SC1003 AT88SC101 AT88SC102 AT88SC1281 AT88SC12816C AT88SC150 AT88SC153 ...
 
 
     
 
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More MCU brands we can reverse engineer below, please contact us if yours not listed here:
AMD Feeling LG / Hyundai Myson STK
ChipON Hynix Mitsubishi National Semi Temic
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Dallas ISSI MXIC SSSC Gal / Pal / Palce
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