74HC595 SH_CP

Projects Programming
1

hi, can any one tell me how to speed up SH_CP on 74HC595. I connect it like this: http://www.arduino.cc/en/Tutorial/ShiftOut but SH_CP is to slow for me.

2

hi, can any one tell me how to speed up SH_CP

What is SH_CP? What code are you using?

3

Drive the '595 from SPI lines instead of shiftout().

digitalWrite (SS,LOW); // SS goes to SRCK pin
SPI.transfer(dataByte); // SCK goes to SCLK ping
digitalWrite (SS, HIGH); // MOSI goes to SerDataIn pin