SET SYSTEM FOR INITIAL VALUE

摘要

PURPOSE:To set the initial value to the storage device with a simple constitution, by connecting plural storage devices of independent operations in series to form a shift register and by inputting and shifting initial value setting data from the ROM. CONSTITUTION:At the initial value setting time, storage devices (FFs) 4-9 which operate independently normally are connected in series by the data line to form a shift register. Initial value 1 or 0 for devices 4-9 is set preliminarily in ROM3 of initial value setting data mechanism 1. Counter 2 of mechanism 1 has a function to count up the number of devices 4-9 and stop counting after that. The initial value setting operation is started by signal R, and counter 2 counts closk pulses T, and FFs operate as the shift register by signal G. Counter 2 outputs address signals A0-A2 to ROM3 in accordance with the count of clocks, and ROM3 reads initial set values of devices 4-9 successively in accordance with these signals and performs the shift operation of devices 4-9 to input initial values to respective storage devices.