| 摘要 |
In a system for displaying a plurality of parameters, such as on an instrument panel of a vehicle, a plurality of signals in the form of pulses each having a pulse frequency corresponding to a respective parameter are generated by respective sensors. Each pulse supplied from these signals to a status register results in generation of an interrupt request signal to a central processing unit. The central processing unit controls a mask register which in turn controls a gating arrangement which selectively masks or inhibits the application of pulses from one or more sensors to the status register so that upon receiving a first interrupt request signal, the central processing unit can mask all sensors but the one responsible for the interrupt request signal and proceed with calculation of the parameter associated therewith by measuring the interval between subsequently-generated interrupt request signals, such measurement being carried out by execution of increment instructions. Internal timing and the use of flags provides for the calculation of successive values of different parameters and the periodic display thereof. |
