SC110 – Z80 SIO/2 & CTC module for RC2014

Slot saving design with a Z80 SIO/2 and a Z80 CTC on one board for RC2014.

This module houses a Z80 SIO/2 chip, which provides two TTL serial ports for use with FTDI style serial adapter cables, and a Z80 CTC, which has four counter/timer channels.

SC110 assembled

The main features of this module are:

  • Full Z80 mode 2 interrupt support (IEI/IEO daisy-chain)
  • Two TTL serial ports for use with FTDI serial adpter cables
  • Software control of port B’s baud rate
  • Source of bus clock (option) to potentially reduce board count
  • Z80 mode 2 interrupt generation for two external devices
  • Counting and timing functions

Documentation, including assembly details:
SC110 v1.1 SIO/2+CTC module User Guide e1.1.0 (PDF)


Schematic v1.1

Download Schematic:
SC110 v1.1 SIO/2+CTC for RC2014 – Schematic v1.1 (PDF)

You can purchase this printed circuit board from Tindie orĀ EasyEDA. Alternatively you can download the Gerber file from EasyEDA and send it to your preferred PCB fabricator.