Hello All,
Sajid Hussain Ansari wrote:
I am using 03 nos. of 4021 for input port and 03 Nos. 4094 for output port with :
- Common Strobe Line,
- Common Clock Line,
- Separate Data lines for input & Output.
I need separate routines for repeated operations of :
(i) getting data from 4021 &
(ii) outputting data to 4094 terminals
so that i can use either input routine or output routine separately with no effect of one routine to another.
Can any one help me to provide such routines.
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Félix Díaz wrote:
Then you must use:
- Separate Strobe Line,
- Common Clock Line,
- Common line for input & Output.
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Charles Bannister wrote:
A picture is worth a thousands words.
http://members.aol.com/cpu8052/cd4021_cd4094.gif
Regards,
Charles Bannister