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| author | Tom Hughes <tomhughes@chromium.org> | 2020-01-14 14:24:23 -0800 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2020-01-15 02:22:38 +0000 |
| commit | 116863bc76b642d94254eb2ad9832c0e6b0818c0 (patch) | |
| tree | 03f6d94d718c8abfd01629a78029f131bc7a621a /docs | |
| parent | 95a7db7ac0ab2029218a18161315439e853d0fe8 (diff) | |
| download | chrome-ec-116863bc76b642d94254eb2ad9832c0e6b0818c0.tar.gz | |
docs/fingerprint: Update Dragonclaw v0.2 rework instructions
Update Dragonclaw v0.2 rework with instructions on how to replace load
switches rather than just bypassing them.
BRANCH=none
BUG=none
TEST=view in gitiles
Change-Id: I28bc36a52f0c574b2e851607495399a11248f38c
Signed-off-by: Tom Hughes <tomhughes@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2001681
Commit-Queue: Craig Hesling <hesling@chromium.org>
Reviewed-by: Craig Hesling <hesling@chromium.org>
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/fingerprint/fingerprint-dev-for-partners.md | 17 | ||||
| -rw-r--r-- | docs/images/dragonclaw_rev_0.2_1.8v_load_switch_rework.pdf | bin | 0 -> 277494 bytes |
2 files changed, 9 insertions, 8 deletions
diff --git a/docs/fingerprint/fingerprint-dev-for-partners.md b/docs/fingerprint/fingerprint-dev-for-partners.md index 36abacce6d..9f17d2fc02 100644 --- a/docs/fingerprint/fingerprint-dev-for-partners.md +++ b/docs/fingerprint/fingerprint-dev-for-partners.md @@ -447,14 +447,15 @@ From the DUT, flash the firmware you copied: ### Dragonclaw Rev 0.2 Rework {#dragonclaw-rev-0.2-rework} +*** note +**NOTE**: All Dragonclaw v0.2 boards have been reworked, so it is not necessary to perform the rework yourself. +*** Dragonclaw **Rev 0.2** has two load switches (`U4` and `U6`) that enable the 1.8V power rail from the servo connector or motherboard connector. However, -this switch is not compatible with 1.8V, so will always output 0V. The switches -can be bypassed by placing a zero ohm resistor on `R14` and `R16`. See the image -below. After performing this rework, do not power the board through the -motherboard and servo at the same time. +this switch is not compatible with 1.8V, so will always output 0V. -![Dragonclaw Rev 0.2 1.8V Rework] +The [rework document][Dragonclaw Rev 0.2 1.8V Rework] describes replacing these +two switches with ones compatible with 1.8V. ### Dragonclaw Rev 0.1 Servo Fix @@ -563,7 +564,7 @@ https://crbug.com/992082. [Dragonclaw with 10-pin SWD]: ../images/dragonclaw_with_10_pin_swd.jpg <!-- If you make changes to the docs below make sure to regenerate the JPEGs by - appending "export/jpeg" to the Google Drive link. --> + appending "export/pdf" to the Google Drive link. --> -<!-- https://docs.google.com/drawings/d/1ecDewBXy8KecyPLi85sXcnqBh4KwK1Z8hfW_T2fDfUU --> -[Dragonclaw Rev 0.2 1.8V Rework]: ../images/dragonclaw_rev_0.2_1.8v_rework.jpg +<!-- https://docs.google.com/drawings/d/1YhOUD-Qf69NUdugT6n0cX7o7CWvb5begcdmJwv7ch6I --> +[Dragonclaw Rev 0.2 1.8V Rework]: ../images/dragonclaw_rev_0.2_1.8v_load_switch_rework.pdf diff --git a/docs/images/dragonclaw_rev_0.2_1.8v_load_switch_rework.pdf b/docs/images/dragonclaw_rev_0.2_1.8v_load_switch_rework.pdf Binary files differnew file mode 100644 index 0000000000..7367064b50 --- /dev/null +++ b/docs/images/dragonclaw_rev_0.2_1.8v_load_switch_rework.pdf |