Loading 3D model… large boards can take a moment.
A small daughter board carrying a full-size, push-push SD card socket for the FN32ROV-XEBook-KiCad main board, which mounts the FujiNet FN32ROV WiFi/SIO adapter permanently inside an XEBook laptop build.
The main board already has an onboard microSD socket (SD1, Hirose DM3D-SF), soldered
directly to the board. This daughter board relocates card access to a side-mounted slot
elsewhere in the XEBook case — full-size SD, push-push (insert to lock, push again to
eject), MacBook Pro-style — wired in parallel to the same SPI bus over a JST pigtail (see
the main board's CLAUDE.md, "External SD card board interface (J_SD1)"). Only one card
should be inserted at a time; both sockets share one SPI bus.
DM1AA-SF-PEJ(82) (JLCPCB/LCSC C506790). Full-size SD, push-push,
right-angle side-entry SMT, shielded, built-in card-detect switch. Same Hirose "DM"
connector family as the onboard microSD. Wired for SPI mode only — CLK, CMD
(MOSI), DAT0 (MISO), CD/DAT3 (CS), matching how the main board's onboard SD1 also
leaves DAT1/DAT2 unconnected (not the 4-bit SD bus). WP (write-protect) is also
unconnected — the 7-pin JST pigtail has no line for it.Connector_JST:JST_PH_S7B-PH-K_1x07_P2.00mm_Horizontal), through-hole. Same footprint
as J_SD1 on the main board, for a low-profile, straight pin-for-pin pigtail (not
crossed): 1=3V3, 2=GND, 3=SPI_CLK, 4=SPI_MOSI, 5=SPI_MISO, 6=SPI_CS, 7=SD_CD
(card-detect, active low).Pull-up resistors for the SPI lines and the card-detect line are not on this board — they live on the main board (R17/R18/R19/R23). This board is wired straight through, pin for pin, same pattern as the LED board's current-limiting resistors living on the main board rather than the daughter board.
MountingHole_2.2mm_M2) flank J1 at the back, 6mm in from the
back edge, well clear of J1's footprint — for screwing the board down once it's slid
into place.Schematic hand-authored, ERC clean (kicad-cli sch erc, 0 violations). PCB routed by hand
in the KiCad GUI; DRC and schematic-parity clean (kicad-cli pcb drc --schematic-parity,
0 violations, 0 unrouted items, only the expected "extra footprint" warnings for the two
mounting holes, which have no schematic counterpart). Board outline finalized at
38mm x 47mm. Fab outputs generated in Fab/ (Gerbers, PTH/NPTH drill + maps, gbrjob,
BOM, CPL, and both JLCPCB-formatted and JLCPCB-assembly-formatted BOM/CPL variants, plus
a zipped -Fab-1.0.zip bundle for direct board ordering). J1 is excluded from the
assembly-variant BOM/CPL since it's through-hole and hand-soldered, same as the LED
board's connector. Not yet ordered — case mechanical fit (wall thickness, card-slot
cutout) is still being worked out against the XEBook case CAD model.
Built with KiCad 9. kicad-cli sch erc / kicad-cli pcb drc --schematic-parity are used
to verify the design as it's built.
CERN Open Hardware Licence Version 2 - Strongly Reciprocal (CERN-OHL-S-2.0), matching the main board.
No comments yet. Be the first to ask about this board.