2 layers155 × 114 mm

IOExpansion
ja1umi/MUTIF09Project
Various design materials for building my 8-bit-microprocessor-based single board computer(s)
198 parts10MIT
Boards in 2 GitHub repositories, designed in KiCad, that use the SC18IM700IPW by NXP Semiconductors (2.4V~3.6V Low-power mode、Fractional baud rate generator TSSOP-16 UART ROHS). See how each wires it, with its parts, size, README and files; the SC18IM700IPW’s symbol, footprint and pinout are on its own page.

ja1umi/MUTIF09Project
Various design materials for building my 8-bit-microprocessor-based single board computer(s)

mlab-modules/I2C232V01
The base module is an integrated circuit SC18IM700, who works as a converter I2C / UART. I2C interface acts as the master. I2C can be used to speed 400kbit / Sau UART can be up to 460.8 kbit / s.