The basic circuit of MCU is onboard, including crystal oscillator circuit, USB power management circuit, USB interface, etc
All the I/O ports are accessible on the pin headers
With JTAG/SWD programming/debugging interface
The pin spacing is 2.54mm, and the volume is small, which is suitable for connecting to the user system
Please Note that Mother board or programmer/debugger in the photo is NOT included. Core405R provides JTAG/SWD debugging interface, yet does NOT integrate any debugging function, a debugger is required