how control 16 LED with a pin of PIC uc?

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alexan_e said:
Yes that is correct but note that when you have 16-bit shift register you have to send 16 bits so that the new

so in order to apply a new 16 bit value you have to send 16 new bits so that the old outputs are shifted out completely.
Alex
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thx , do you think that I can send a 16bit binary code with PIC18 family via SPI ?and please advice me a 16bit shift register
 

you could use the SPI based MCP23106 port expander chip, alternatively to reduce the number of parts you could use a 16F877A mcu, this will give you the desired number of outputs, and will also reduce the software overheads...
 


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