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(title_block (title "System overview and reading map") (date "2026-11-08") (rev "0.0.11-dev") (company "ShieldSigner / LightningSpore") (comment 1 "Derived from 3rdIteration/SeedSigner; original design: Stephen Rothy") (comment 2 "Prototype: physical fit, powered operation and assembly not qualified"))
(text "ShieldSigner | eight-pin pill carrier" (at 22.86 22.86 0) (effects (font (size 2.54 2.54) (bold yes)) (justify left)) (uuid "909f6942-ec27-5a56-9fda-f2759ecae4f3"))
(text "Native KiCad reference | 160 x 70 mm | four copper layers | 1.6 mm nominal thickness" (at 22.86 33.02 0) (effects (font (size 1.27 1.27) ) (justify left)) (uuid "63a2f7b7-ca30-590d-8f51-586d7e4d6430"))
(text "READING MAP  (lines below describe system flow; connections use named nets on the circuit sheets)" (at 22.86 44.45 0) (effects (font (size 1.1 1.1) ) (justify left)) (uuid "a7f8c975-f82e-5c9b-a875-10b1e63ef773"))
(text "+5V input, USB-C CC, TVS\nKeystone +5V/GND test clips" (at 30.48000 63.50000 0) (effects (font (size 1.27 1.27) ) (justify left)) (uuid "6d58d580-6c45-5762-beba-85d00f6c39cd"))
(text "Luckfox Pico Mini, I/O map\nand factory configuration straps" (at 109.22000 63.50000 0) (effects (font (size 1.27 1.27) ) (justify left)) (uuid "a058416a-3dd1-5e77-8468-e13e14743923"))
(text "8-pin SPI module + AP2112\nDedicated LCD_3V3 supply" (at 203.20000 63.50000 0) (effects (font (size 1.27 1.27) ) (justify left)) (uuid "4f547a32-f301-5e89-9b30-4db6450be309"))
(text "Active-low navigation and keys\nUse host pull-ups and debounce" (at 30.48000 111.76000 0) (effects (font (size 1.27 1.27) ) (justify left)) (uuid "92aa7d37-1aee-5591-8f55-512eb10e7646"))
(text "UART reader, reset, bypass\nand combined smartcard socket" (at 109.22000 111.76000 0) (effects (font (size 1.27 1.27) ) (justify left)) (uuid "3a924a82-be86-5e1a-9c61-b8e795b79b97"))
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(text "UART" (at 149.86 88.9 0) (effects (font (size 1 1) ) (justify left)) (uuid "2571cb6a-b120-54b4-b3e5-65d63da4953f"))
(text "ASSEMBLY DEFAULT\nJP201 / JP203 / JP205 closed\nJP202 / JP204 / JP206 open\nBacklight always on; eight-pin J701." (at 203.2 104.14 0) (effects (font (size 1.27 1.27) ) (justify left)) (uuid "1b957ff7-ff34-5a1f-bdba-2ab57a983884"))
(text "STACKUP / REVIEW\nF.Cu signals / In1.Cu GND / In2.Cu GND / B.Cu signals. Confirm the nominal stackup with the fabricator.\n0.0.11-dev adds eight factory service points and four independent M2.5 bracket anchors.\nERC / DRC are software checks. Module fit, powered operation and supplier assembly remain unqualified." (at 22.86 153.67 0) (effects (font (size 1.1 1.1) ) (justify left)) (uuid "ef6b0108-df8c-5bdb-a42f-fef28cec288f"))
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