Hardware

Although iPods have many other components, here we are only listing the components that might be relavent to cracking firmware encryption. If you have any suggestions for any other components to add, just post on the talk page or IRC. Links to datasheets are important if they can be found.

1G Nano

Component	Details
CPU	Portal Player PP5021C-TDF. This is the last Nano that used a PortalPlayer processor.
RAM	Samsung K4M56163PG - apparently the datasheet can be found here.
Utility Flash ROM
NAND Flash	This chip is dependent on the iPod model, but all interface in the same way.

2G Nano

Component	Details
CPU	Samsung S5L8701 ARM940T processor. The processor itself is Apple-branded and marked 337S3291 8701, but the markings share an S for Samsung, and 8701 for the part number.
Utility Flash ROM	SST SST39WF800A,stores Disk Mode, Diagnostic Mode and the code to flash this chip. Tof has managed to extract this data and the dump can be obtained by emailing Emmanuel Fleury.
RAM	Samsung K4M56163PG - here is the datasheet. This is the same chip used in the iPod 1G Nano.
NAND Flash	This chip is dependent on the iPod model, but all interface in the same way. Common ones for the 2G Nano are the Samsung K9MBG08U5M and the Hynix HY27UW08BGFM.

3G Nano

Component	Details
CPU	Samsung S5L8702 ARM940T processor. The package itself is Apple-branded and marked 337S3473 8702, but the markings share an S for Samsung, and 8702 for the part number.
RAM	Like the flash chip, the memory also varies. The most popular chip seems to be the K4X561, a 256Mbit (32MByte) Mobile 1.8V DDRAM. Another similar one that is sometimes used is the Qimonda HYE18M169CX75.
Utility Flash ROM
NAND Flash	This chip is dependent on the iPod model, but all interface in the same way. A common one for the 3G Nano is the Samsung K9MBG08U5M.

4G Nano

Component	Details
CPU	Samsung S5L8720 ARM940T processor. It is definitely worth knowing that this is the exact same processor used in the iTouch 2G. This could mean that some of the same exploits for that could possibly be used. Here is a very interesting page about the S5L8720 processor.
RAM	Integrated into the processor, similar to the iPod Touch and iPhone lines.
Utility Flash ROM
NAND Flash	This chip is dependent on the iPod model, but all interface in the same way.

Helpful pages

http://home.gna.org/linux4nano/download/hardware_synth-1.0.pdf

http://theiphonewiki.com/wiki/index.php?title=S5L8720_(Hardware)

http://www.ipodlinux.org/wiki/Generations (Be careful! This is extremely inaccurate.)

1G Nano

http://arstechnica.com/apple/reviews/2005/09/nano.ars/4

Image of the 1G Nano board

2G Nano

http://www.ifixit.com/Guide/First-Look/iPod-Nano-2nd-Generation/592/1

http://arstechnica.com/apple/reviews/2006/09/ipod-2g.ars/4

3G Nano

http://www.ifixit.com/Guide/First-Look/iPod-Nano-3rd-Generation/594/1

http://arstechnica.com/apple/reviews/2007/09/the-ipod-gets-a-makeover-a-review-of-the-ipod-nano-and-ipod-classic.ars

http://insidetronics.blogspot.com/2007/09/teardown-ipod-nano-3g.html

http://www.appleinsider.com/articles/07/09/10/a_peek_inside_apples_new_nano_and_classic_ipods_photos.html

4G Nano

http://www.ifixit.com/Guide/First-Look/iPod-Nano-4th-Generation/584/1