... minimal system board, which contains the basic power supply circuit (5V supply), reset circuit, the standard JTAG debug interface, users debug light, ... resources as shown above, it is a double-layer circuit board, in order to learn to develop user-friendly ... 4 user LED* Socket 162 pin 2.0mm pitch measurementsOnboard reset circuit, a reset buttonĀ· 5V power supply* Size: 63 x 52mmOperating system ...