You can buy SPI interface parallel ports with 16-pins per chip. It's a single chip solution for what you are doing and it connects directly to the SPI pins on the ARM processor The Microchip MCP23S17 is one example.
The Max MAX7301 is nice too. You get 28-pins and each is programable input of output and yo can turn on an internal pull up. Works up to 5.5 volts and handles data at 20+ MHz. This is also a one chip solution. There are a lot of them out there. Those shif registers are from the 1980's On Mon, Jan 14, 2019 at 1:13 PM Dave <[email protected]> wrote: > Hi, > I am working on a cape for basic IO buffering for the step/dir pins and I > also want to use shift registers for the regular input/output. > I am planning on using a 74hc595 on the board for the 8 outputs and a > 74hc165 for the inputs. > > -- Chris Albertson Redondo Beach, California -- website: http://www.machinekit.io blog: http://blog.machinekit.io github: https://github.com/machinekit --- You received this message because you are subscribed to the Google Groups "Machinekit" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. Visit this group at https://groups.google.com/group/machinekit. For more options, visit https://groups.google.com/d/optout.
