I am confused about how to use the 74HC595 with the ATtiny84 uc. I would like to run 4 595s daisychained using spi off the ATtiny84. There is no CS or SS pin dedicated on the tiny84 and I plan on using one of the GPIO pins for this purpose. My question is do I need a seperate GPIO pin for each of the 595s RCLK or can I simply use one for all of the 595s and simply push through my 4 bytes of data (obviously with the 595s configured with Qh to SER)?
Joined: Sat. Jan 5, 2019
Posts: 29 View posts
Last Edited: Sat. Dec 28, 2019 - 11:28 PM