Search   
Home  Print View  

 

Electronics

Branch Content

Encoded Time signals (ET0, ET1, ET2)

Encoded Time signals ET0, ET1, ET2 represent an ascendant count (named "ET count") generated by a counter circuit clocked by the Master Clock. The count rolls over from 111 back to 000 if not terminated (reset) earlier.

Counts are conventionally named T1, T2,..., T8 as shown below:
    
   ET0  ET1   ET2     Name
   --------------------------------------
   0    0    0        T1
   0    0    1        T2
   0    1    0        T3
   0    1    1        T4
   1    0    0        T5
   1    0    1        T6
   1    1    0        T7
   1    1    1        T8
   --------------------------------------

These signals are inputs for the different sequencer circuits and serve to define sequence steps. Most sequences are short, taking only one or two steps. The longest are related to interrupts and CALL instructions and take eight steps to complete.

Powered by HelpBooks version 0.86, running at: melissa