IEEE 802.15.4 subsystem
Sign in or create your account | Project List | Help
IEEE 802.15.4 subsystem Commit Details
Date: | 2011-03-15 01:31:55 (13 years 4 days ago) |
---|---|
Author: | Werner Almesberger |
Commit: | eac6e3c70ba7b87fe07e3d7c88459d610bc7c76d |
Message: | atben/README-PCB, atusb/README-PCB: various minor clarifications - README-PCB: added imperial units for board thickness - README-PCB: changed surface finish recommendation to prefer ENIG more strongly - README-PCB: removed instructions for Gerber file generation from "interpretation of files section" - README-PCB: mention common coordinate system origin |
Files: |
atben/README-PCB (2 diffs) atusb/README-PCB (2 diffs) |
Change Details
atben/README-PCB | ||
---|---|---|
1 | 1 | Board characteristics: |
2 | 2 | |
3 | 3 | - stacking: 2 layers, solder mask on front and back, silk screen on front |
4 | - board material: FR4, thickness 0.8 mm, 1 oz copper | |
5 | - surface finish: ENIG (preferred) or tin | |
4 | - board material: FR4, thickness 0.8 mm (1/32"), 1 oz copper | |
5 | - surface finish: ENIG recommended | |
6 | 6 | - via holes: diameter is nominally 10 mil, but any size <= 15 mil can be used |
7 | 7 | - mechanical tolerances: <= +/- 0.1 mm on all sides |
8 | 8 | |
... | ... | |
22 | 22 | |
23 | 23 | Interpretation of files: |
24 | 24 | |
25 | - do not print PCB edges on front/back copper | |
26 | - do not print component values on silk screen | |
25 | - for all coordinates, the origin is the lower left corner of the board | |
27 | 26 | - the center (!) of the board edge line marks the true board edge, e.g., |
28 | 27 | |
29 | 28 | Edge line (5 mil) |
atusb/README-PCB | ||
---|---|---|
1 | 1 | Board characteristics: |
2 | 2 | |
3 | 3 | - stacking: 2 layers, solder mask on front and back, silk screen on front |
4 | - board material: FR4, thickness 0.8 mm, 1 oz copper | |
5 | - surface finish: TBD, both ENIG and tin are acceptable | |
4 | - board material: FR4, thickness 0.8 mm (1/32"), 1 oz copper | |
5 | - surface finish: TBD, ENIG is preferred | |
6 | 6 | - via holes: diameter is nominally 10 mil, but any size <= 15 mil can be used |
7 | 7 | - mechanical tolerances: <= +/- 0.1 mm on all sides |
8 | 8 | |
... | ... | |
22 | 22 | |
23 | 23 | Interpretation of files: |
24 | 24 | |
25 | - do not print PCB edges on front/back copper | |
25 | - for all coordinates, the origin is the lower left corner of the board | |
26 | 26 | - do not print component values on silk screen |
27 | 27 | - the center (!) of the board edge line marks the true board edge, e.g., |
28 | 28 |