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diff --git a/mini64/README b/mini64/README new file mode 100644 index 0000000..ee5dc05 --- /dev/null +++ b/mini64/README @@ -0,0 +1,36 @@ +Mini64 is a STM32 development board for OpenSTM32 project (https://github.com/gbulmer/openstm32). + +Features: +- Small (52x38.4mm) breadboard compatible design. +- Support for STM32F103/F2xx/F4xx in 64-pin packages. +- 3 separate voltage regulators - two small current LDOs for MCU (separate for analog/digital parts) and one + 800ma LDO for sourcing external load. +- LiPol battery charger +- RTC crystal on board +- CR2032 battery holder for RTC on board +- Automatic power source selection +- One user button connected as in Maple board +- Two user LEDs, one connected as in Maple board and one connected as in Maple Mini board + +The design files were created in Eagle 5.11. + +At present design is single sided and suitable for DIY PCB production, although the requirements +to the production process is quite high - board uses 0.15/0.15mm traces/spaces and designed with +presence of solder mask in mind. The design is optimized for dry film negative photoresist process. +Design files as-is are ready to use for ordering boards at some PCB production service. +Although they can be used For DIY production too, it might be useful to do following changes +in the design files before creating photomask: + +- Increase width of the dimension rectangle to 0.2mm and include it into top layer and + solder mask photomasks. +- Change width of default net class tracks to 0.17mm. +- Change width of vcc net class tracks except GND polygon to 0.32mm. +- Change width of GND polygon wire to 0.1mm + +NOTE: After these changes board will not pass DRC! If you plan make further modifications in the +PCB changed as described above, change DRC rules accordingly. + +Comments and suggestions are welcome. + +Regards, + Sergiy Yevtushenko <Sergiy.Yevtushenko@gmail.com> diff --git a/mini64/mini64-v0.9.8.brd b/mini64/mini64-v0.9.8.brd Binary files differnew file mode 100644 index 0000000..79e395c --- /dev/null +++ b/mini64/mini64-v0.9.8.brd diff --git a/mini64/mini64-v0.9.8.sch b/mini64/mini64-v0.9.8.sch Binary files differnew file mode 100644 index 0000000..aa5b48a --- /dev/null +++ b/mini64/mini64-v0.9.8.sch |