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Keypad Check List

Yes/No
Indicate whether you were able to make the following circuits work properly.
 

1. 

Keypad Encoder?
 

2. 

Memory Address Counter?
 

3. 

Memory Read/Write?
 

4. 

Register A?
 

5. 

Register B?
 

6. 

Dual 4-bit Comparator?
 

7. 

Reset on entering/leaving Program Mode?
 

8. 

Reset if A not = B?
 

9. 

Increment Memory counter if A = B?
 

10. 

Count 4 consecutive correct numbers?
 

11. 

Toggle Arm/Disarm?
 

12. 

Reset memory address counter if 4 correct numbers entered?
 

13. 

Disable the store function in the normal operating mode?
 

14. 

Increment the address counter during the 1st one-shot period?
 

15. 

Enable the comparitor during the 2nd one-shot period?
 

16. 

Check for 4 correct entries during the 3rd one-shot period?
 



 
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