# Common knowledges tells JTAG speed should be <= F_CPU/6.
# F_CPU after reset is MSI 4MHz, so use F_JTAG = 500 kHz to stay on
# Common knowledges tells JTAG speed should be <= F_CPU/6.
# F_CPU after reset is MSI 4MHz, so use F_JTAG = 500 kHz to stay on