| 摘要 |
PURPOSE:To simplify a system constitution and to facilitate the control of the system together with the improvement of system accuracy by converting the input digital signal into a digital function signal for output and then converting this function signal into an analog signal after the selection of said function signal carried out based on an external function selecting signal. CONSTITUTION:A console 8 is set by the operating state of a system and this setting condition is fetched by a CPU 2 via a digital input circuit 3. Based on the fetched data, the CPU 2 transmits the selection code of an output func tion and the output data to an analog output circuit 1a. The circuit 1a decides an optical output function based on the selection code and applies the function arithmetic to the output data for acquisition of an analog signal AO203 to deliver this to the outside. The selection of each input circuit is decided by an address signal SA via an address bus 202. Then the transfer of the data SD is carried out via a data bus 201. Thus, the system control is facilitated together with the improvement of the system accuracy. |
