SN74HC595: SN74HC595 2 wire connection?

Tsjellum van der Stok

Part Number: SN74HC595

Is it possible to control the outputs of the SN74HC595 using only 2 GPIO connections? I vaguely remember doing this in school, tying RCLK and SRCLK together to on GPIO pin, *SRCLR tied high, and *OE low. SER to the other GPIO pin.

over 4 years ago

0 Dylan Hubbard over 4 years ago

TI__Mastermind 42600 points

Hi Tsjellum,

Yes, your suggested implementation is possible. It is important to know that the default output of the shift registers and storage registers will be unknown so you will need to initialize the device by shifting data through it.

Logic

Logic forum

SN74HC595: SN74HC595 2 wire connection?