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author | Michael Bacarella <michael.bacarella@gmail.com> | 2018-12-03 13:31:35 -0800 |
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committer | Felix Held <felix-coreboot@felixheld.de> | 2018-12-05 07:02:32 +0000 |
commit | 134c30761e9a1a7c9a89823976b9cbdce11b3fce (patch) | |
tree | 1af96661dea12563bd3f7f564072b8b96d31f535 /Documentation/mainboard/lenovo/t420.md | |
parent | 497becf1f18d48a633e7e7bfa0b3872976091a3f (diff) | |
download | coreboot-134c30761e9a1a7c9a89823976b9cbdce11b3fce.tar.xz |
Documentation/mainboard/lenovo/t420.md: add pic of chip
Provide pic of the flash IC with pinouts labeled, as well
as additional text about the chip.
Signed-off-by: Michael Bacarella <michael.bacarella@gmail.com>
Change-Id: I9046fa63dcd4d192836417efac68ca7587ac1c91
Signed-off-by: Michael Bacarella <michael.bacarella@gmail.com>
Reviewed-on: https://review.coreboot.org/c/30027
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Diffstat (limited to 'Documentation/mainboard/lenovo/t420.md')
-rw-r--r-- | Documentation/mainboard/lenovo/t420.md | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/Documentation/mainboard/lenovo/t420.md b/Documentation/mainboard/lenovo/t420.md index ff7a0a9238..6ebff0ed3e 100644 --- a/Documentation/mainboard/lenovo/t420.md +++ b/Documentation/mainboard/lenovo/t420.md @@ -1,8 +1,17 @@ # Lenovo T420 ## Flashing instructions -You have to disassemble the whole device, as the flash IC is on the bottom -of the mainboard. +The flash IC is located at the bottom center of the mainboard. Sadly, +access to the IC is blocked by the magnesum frame, so you need to disassemble +the entire laptop and remove the mainboard. + +Below is a picture of IC on the mainboard, with the pinouts labeled. + +[t420_chip_location]: t420_chip_location.jpg + +The chip will either be a Macronix MX25L6404E (shown above) or a Winbond +W25Q64CVSIG. Do not rely on dots painted in the corner of the chip (such as +the blue dot pictured) to orient the pins! For more details have a look at [T420 / T520 / X220 / T420s / W520 common] and |