how control 16 LED with a pin of PIC uc?

[mf1364]

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

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

 

[arbj]

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...

 

[alexan_e]

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

To send 16 bit you send two 8bit values ane after the other and you have the same result.
Take a look at this tutorial Using Serial Peripheral Interface (SPI) with Microchip PIC18 Families Microcontroller | ermicroblog

Alex