jkominek
commented
3 years ago - [x] Generally review the thermal relief on the top layer to ease hand soldering
- [x] Specifically improve the thermal relief around the RS485 transceiver decoupling caps
- [x] Similarly improve thermal relief around the I2C connector decoupling caps
- [x] Fix silkscreen of C20 (decoupling cap for I2C J6)
- [x] We use lots of ferrite beads on this one. The 0805 inductor footprint is a PITA; increase to hand soldering 0805 footprint, or maybe use the non-hand soldering capacitor 0805 footprint.
- [x] BOM for the Pwr and Stat LED current limiting resistors should be adjusted way down. Currently 3300 ohm(!) they should be more like 300 ohm.
- [x] The JTAG header is 33mm x 9mm. It needs a significantly larger courtyard than was used.
- [x] I got the battery connector pinout wrong, because I forgot to look up the connector polarity. Just remove the battery and RTC stuff. There is at least one Qwiic RTC board available from Sparkfun, that should work just fine for anyone who wants standalone operation with correct timestamps on the SD card.
- [x] STM32H7 actually has special hardware support for SD cards. Rearrange UARTS/I2C/etc to get access to one of those sets of pins. Drop the use of SPI6.
- [x] The SDCARD_DET line was hooked up all wrong. Fix that.