Micro­power

   

Volume 2 · Number 1 · February 1982
Page 19 of 37

Fig. 1     2708 Programmer Circuit


Notes: 1) Port A Of Pio Used For Data, Port B For Control
2) Decoupling Capacitors 0.01 – 0.1 Uf Should Be Used On Each Ic (As On IC 3)
3) The Pin Numbers Shown Refer To The Nas­Com 2 26-Way Pio Connector
4) Observe Cmos Handling Precautions With Ics 1 And 3, And The Eproms
5) If Possible Use Zero Insertion Force Sockets For The Eproms
6) Unmarked Pull Up Resistors Can Be In The Range 4.7k To 10k
Page 19 of 37