| 摘要 |
PURPOSE:To facilitate the easy alteration of the counting function by sending outside the count value which is read out of the read-only memory means and at the same time designating temporarily the contents of the memory means in the form of the address to the read-only memory means. CONSTITUTION:External unit 13 makes first signal line 23 effective and giving the initial setting to the contents of temporary memory circuit 11 to all logic ''1''. The contents of circuit 11 is supplied ROM12 via signal line group 21. Unit 13 receives supply of the information of logic ''0000'', ''0001'', ''0010''...''1111'' via signal line group 22 by making signal line 24 effective in sequence, thus performing the addition calculation. Also the information of the different sequence can be generated by writing previously the different information into ROM12. |
