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The 74HC595 is an 8 bit serial in, parallel out shift register.

Example Code

TestShiftOut




TestBitBangSlow









TestBitBangFast









TestSPI










  
Timing






  


Program
1 000 000 updates
Updates/sec


  
  


TestShiftOut

138.013


7 246





TestBitBangSlow

122.482


8 164





TestBitBangFast

12.637


79 133





TestSPI

2.702


370 096