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Help me make an interface between AT89C251 and keyboard

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sokrat

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hi all

i want to make interface between at89c251 and keyboard any one can helpe me about keyboard ? :?:


thanks

S 8O KRAT
 

sokrat

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thanks

thanks nick c

it is good start
but any example or source code with pic family and i want at89c2051 or 8051 family

thanks

yours

S 8O KRAT
 

sokrat

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thanks

nick c


thanks but this links not enough :cry:



thanks

YOURS

S 8O KRAT
 

meax98

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Take look at this keypad (up to 64 keys) encoder. EDE1188.

http://www.elabinc.com/EDE1188.pdf

The EDE1188 Keypad Encoder IC is designed to interface a matrix-type 8 row x 8 column (64 key or less) keypad to a microcontroller or other host processor. A one-wire serial or eight-wire parallel interface returns the keypress data and can be used in conjunction with a 'data valid' signal for polled or interrupt-driven applications. The EDE1188 provides enhanced keypad features such as contact debouncing and key auto-repeat in an easy-to-use package that will lower software overhead in the host microcontroller and reduce the I/O pin requirements from sixteen to one, frequently resulting in the use of a less costly host microcontroller in your design.

regards
meax98
 

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