SC144, v1.1, Description

SC144 is dual function real time clock and I2C bus master interface card designed for the Z50Bus.

The main features of this design are:

  • Z50Bus card measuring approximately 100mm x 75mm (4″ x 3″)
  • Real time clock (RTC) using DS1302+ integrated circuit
  • I2C bus master for 5 volt I2C devices
  • Configurable I/O address with tight address decoding
  • LED indicators to show the state of the I2C signals
  • A variety of I2C bus connections (both male and female)
  • Spare I/O lines available via header pins
  • Jumpers to allow I2C signals to use the bus USER pins

Homebrew 8-bit retro computing