SC505 is dual function real-time clock and I2C bus master interface card designed for 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