...
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), we can reprogram our ST-Link V2 Clones to receive UART |
Daisy chaining 12V power or not (LV power granularity) | No daisy chaining, 12V power from carrier only |
Hermaphroditic board-to-board connectors or not | Non-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 routingrework |
How many pins do we dedicate to 3.3V, 12V, and GND on the mezzanine? Currently evaluating | 3.3V: 6 pins GND: 8 pins These were determined based on the number of pins we have left from using all the GPIOs. Ground was chosen to be on both sides to ensure a good connection. |
0.5mm or 0.8mm pitch mezzanine connectors? | Evaluating (0.8mm is much more expensive)5 mm |
Key Components
Part | Info | Digikey Link |
---|---|---|
STM32F072CBT6 | ARM Cortex-M0 Includes CAN controller, 37 IOs, 48-LQFP | |
TCAN332DR | CAN Transceiver Replacement for the SN65HVD232DR |
...