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| Question | Outcome |
|---|---|
UART/USB? If we use USB, may need serial-to-usb converters on-board (In-car debugging) | UART only (Serial-to-USB converters are cheap) |
| Daisy chaining 12V power or not (LV power granularity) | No daisy chaining |
| Hermaphroditic board-to-board connectors or notProbably not - much more expensive for not much | valueNon-hermaphroditic bergstak connectors |
Switching regulator circuit or integrated DC-DC converter (board complexity, cost) | Switching regulator circuit due to price and component height |
LQFP vs UFQFPN | LQFP for ease of routing |
How many pins do we dedicate to 3.3V, 12V, and GND on the mezzanine? | Currently evaluating |
| 0.5mm or 0.8mm pitch mezzanine connectors? | Evaluating (0.8mm is much more expensive) |
Key Components
Part | Info | Digikey Link |
|---|---|---|
| STM32F072CBT6 | ARM Cortex-M0 Includes CAN controller, 37 IOs, 48-LQFP | |
TCAN332DR | CAN Transceiver Replacement for the SN65HVD232DR |
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