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Probleam on ps2 keyboad interfacing with pic micrrocontroller

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Dinuwilson

Dinuwilson

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Hai.. friends , i am trying to connect my ps2 keyboard with pic 16f876A microcontroller. my hardware and software are works perfectly but when i ues zebronics keyboad it's not working.. all other companies are working... for find the reason i check the clock frequencies of each keyboad.. all keyboards are work in same frequency except zebnonics .please help me to solve this

used components
Pic16f876A
crystal: 4Mhz
clock line of keyboard is connected to RB0 pin of PIC (external interrupt)
Data line is connected to RA4 pin
 

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