CyberResearch’s 4CYDDA 06 is a six-channel analog output board built on the PC104 format. The 4CYDDA 06 is compatible with the CYDDA 16 but has six channels instead of sixteen. Software designed for the CYDDA 16 and CYRDDA 06 (MetraByte™ compatible) will operate the analog outputs correctly.
The analog outputs are controlled by writing a digital control word (two bytes) to the DAC's control register. The control register is double buffered. This means the DAC's output will not be updated until both bytes (low byte first, then high byte) are written to the register.
The analog outputs may also be set for simultaneous update in groups of two, four or six. When a DAC pair is set for simultaneous update, writing a new digital value to the DAC's control register does not cause an immediate update of the DAC's voltage output. Update of the output occurs only after a READ from the board's valid addresses. In this way, the 4CYDDA 06 may be set to hold new values until all channels are loaded, then update your choice of channel pairs simultaneously. This is a very useful feature for process or multi-axis motor control.