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78 lines
2.5 KiB
Plaintext
78 lines
2.5 KiB
Plaintext
There are several different embedded controller chips that have been
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used over the thinkpad range. This file lists the ones that we have
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seen and is a place for recording information about them.
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It is not intended to be an exhaustive list, as that would require
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schematics, physical inspection or reverse engineering the EC firmware
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for a lot of different models.
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ThinkPad T4x/p and R5x/p:
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-------------------------
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Renesas H8S/2161BV
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(source: http://forum.thinkpads.com/viewtopic.php?t=20958)
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ThinkPad x220:
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--------------
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Renesas H8S R4F2113NFT-1-GP
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Looks very similar to the 2161BV
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(source: physical inspection, reverse engineering the EC firmware
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and the schematics - http://plan9.stanleylieber.com/hardware/thinkpad/x220/x220.schematics.pdf)
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ThinkPad xx30 series:
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---------------------
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SMSC/Microchip MEC1619L-AJZP-GP
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This is a 32-bit ARC core CPU, with most of the firmware written using
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the ARCompact variant of the instruction set
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MEC product family specs:
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http://pdf.datasheetarchive.com/indexerfiles/Datasheets-EC3/DSAQ00359444.pdf
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Microchip product page:
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https://www.microchip.com/wwwproducts/en/MEC1619
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(note that microchip does not have a real datasheet available but there is one for the similar MEC1618:
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http://ww1.microchip.com/downloads/en/DeviceDoc/00002339A.pdf)
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(source: physical inspection, reverse engineering the EC firmware
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and the schematics - http://plan9.stanleylieber.com/hardware/thinkpad/x230/x230.schematics.pdf)
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This chip has a JTAG programming port, so it is possible to read and
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write the firmware with an external programmer, which might help in
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the case of a bricked system.
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(see discussion: http://notebook1.ru/forma1/viewtopic.php?f=70&t=109179)
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The procedure for doing this is documented here: https://github.com/taglour/x230-ec-jtag
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ThinkPad l420:
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--------------
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IT8511TE
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This is a 8051 core CPU.
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(source: schematics - http://www.informaticanapoli.it/download/SCHEMIELETTRICI/IBM-LENOVO/Lenovo%20laptop%20motherboard%20schematic%20diagram.pdf)
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Thinkpad l430/l530:
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-------------------
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Nuvoton NPCE885G
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This is a CR16C core CPU.
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ThinkPad e330:
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--------------
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Nuvoton NPCE885G
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(source: EC firmware similarity to the l430)
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Thinkpad x250:
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--------------
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An ARCompact instruction set CPU, so probably a MEC1619
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(source: reverse engineering the EC firmware)
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Thinkpad x260:
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--------------
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An ARCompact instruction set CPU, so probably a MEC1619
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(source: reverse engineering the EC firmware)
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