Motor Control board DIM Connection Viewer

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Interactive browser of every signal that crosses the 120-pin MCS DIM connector between a Motor Control DIM card (the MCU board) and a motor-control baseboard — built for MPLAB Device Blocks developers wiring a Simulink model to a given DIM + baseboard.

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How to read a pin card

Each of the 120 DIM pins is one card, grouped into colour-coded category sections (PWM, ANA, QEI, HAL, FLT, PFC, DBG, COM, LED, BTN, XPRO1, XPRO2, PWR, NC, …). The section header names and colours the category, so there is no separate on-page legend.

A first “DIM” section summarises the board itself, not connector pins: the MCU identity (part, order code, package, Flash / RAM / speed / V_DD), the on-DIM 8 MHz clock (an active oscillator on OSCI/CLKI — External Clock mode, not a 2-pin crystal), the general-purpose LED LD2, and the ICSP/J2 programming pins (MCLR / PGD / PGC).

Useful interactions

• Search box (top sub-bar) — filter cards by signal, pin, function or port. Supports wildcards: * = any text, ? = any single character (e.g. PWM*H, M1_I?). Next to it the chip characteristics (Flash / RAM / speed / V_DD) and the pin-count stats.
• Hover any pin card to see the full pin signature (all PPS / AD / CVD / CMP tags) plus its alternate routings and any DNP-rework note.
• Sort within category — by Function, DIM pin, MCU pin, or Connector pin (XPRO1 then XPRO2).
• Show alternate (0 Ω) routings — reveals secondary routes; an alternate flagged rework is DNP and needs a board modification (move/add 0 Ω resistors, often to switch to an external op-amp) before it can be used.
• Highlight motor-control-essential — frames the PWM / current / voltage / Hall / QEI / fault (plus LED & button) signals and dims the rest, for sanity-checking a control-loop wiring.
• The DIM and Baseboard dropdowns each carry a ↗ link to the Microchip product page; the selected view is encoded in the URL (the address-bar link is shareable).

Related resources

• mchp-board-dim-mapping skill — full methodology for maintaining the spreadsheet and adding new DIMs. (In-repo at .pi/skills/mchp-board-dim-mapping/SKILL.md; not served by Hugo.)
• Motor Control Guide — high-level overview of the MCHP motor-control ecosystem.
• Block Reference → PWM HS FEP — the PWM block that drives the inverter pins visible in this viewer.
• Microchip Motor Control landing page — product-level information and development kits.

Data-source details

The embedded data is assembled from four authoritative inputs:

1. Motor Control DIM-Pin Mapping.xlsx — the Pin-DIM, DIM-Pin, and Alternates tabs
2. MCS DIM Info Sheets on Confluence (space MCU16APP) — for DNP / alternate-path remarks
3. Per-chip datasheets — for the pin-name signatures shown on hover
4. MCHP_ChipDef.mat — for cross-checking that every MCU pin mentioned actually exists on the target silicon

The extraction pipeline lives at Claude_Sandbox/boards/ in the repository; regeneration is a manual step (not part of build.sh) because it reads Confluence directly.

Known limitations

• Date-stamped snapshot. A commit to the spreadsheet or the Confluence sheets after 2026-06-16 will not automatically propagate here; the tool must be regenerated.
• Single baseboard pair only. Only MCLV-48V-300W and MCHV-230VAC-1.5kW are bundled today. Adding a new baseboard means extending the generator, not just dropping a new JSON.
• Read-only. There is no “export schematic” button — this is a lookup tool, not a CAD integration.
• Browser-only. Works in any modern desktop browser (Chrome, Edge, Firefox, Safari). Not tested on mobile; the 120-row grid is hard to read on a narrow screen.

Feedback

Found a discrepancy with the spreadsheet or with silicon? Either:

• File a Jira ticket on the internal MCU16APP project, or
• Edit the spreadsheet first, then regenerate the viewer via Claude_Sandbox/boards/build_viewer.py.

Do not edit the embedded data directly in index.html — the fix will be lost on next regenerate.