characteristics:
1:on-board-based MCU most basic circuits, such as crystal oscillator circuit, USB power management circuitry and USB interface.
2:the core board raises all I / O port resources.
3:with the SWD debugging emulator download interface, which requires a minimum of 3 lines can be completed commissioning download tasks, compared to traditional JTAG debugging there are a lot of benefits, a plug in here, JTAG and now a great tendency to be phased out, such as ST's new out of the M0 MCU series to retain only the SWD debug interface, JTAG directly canceled
4:Dimension only traditional DIP40 package (such as AT89S52 ) size, has not yet found on Taobao smaller than our core board the same specifications.
5:the use of current smart phones used Mirco USB interface easy to use, do USB communications and power supply.
6:for the STM32 RTC can not afford to vibration problems, we recommend using the official low-load RTC crystal scheme, and use the Epson brand crystal, without the use of an inexpensive cylindrical crystal.
7:with a high quality 1 * 40 / 2.54mm pitch single row pin ensure excellent conductive contact, user-friendly core board is placed into a standard-purpose board or breadboard. Pin default is not welding, the user can choose according to their needs welding direction.
8:You can use the Keil compiler, IAR compiled by J-Link or USART1