/products/raspberry-pi/b/blog/posts/raspberry-pico-talk-to-ics-with-active-high-chip-select-csSPI ICs usually have an active low chip select pin (~CS, nCS, ...). I have a Texas Instruments IC (stepper motor driver DRV8711) that has an active high CS. Initially, I bit-banged the CS pin: set it high with the GPIO API before communication, ...en-USTelligent Community 12https://community.element14.com/products/raspberry-pi/b/blog/posts/raspberry-pico-talk-to-ics-with-active-high-chip-select-csFri, 25 Apr 2025 14:41:34 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:be6428fe-c87a-47d7-9e7b-24fa559e52f6shabaz1<p>Interesting that it&#39;s active high.. I think I now know why though:</p> <p>I added&nbsp;a resistor R30 to my motor PCB last night; in my case the Toshiba chip has an enable pin (ENA_X) which is active low (I should have named it better; I took the naming from the datasheet, bit weird how they are using _X to perhaps indicate negation), and there&#39;s a chance the chip will be enabled if the power is&nbsp;applied before the Pi Pico is powered up.&nbsp;</p> <p>The Toshiba chip (TB67S581FNG) is not bad, for the very low price, it has some power capability (50V 2.5A capable), although I wish it went a bit higher (say 60-80V) to power larger stepper motors.</p> <p></p> <p><img alt=" " height="410" src="/resized-image/__size/642x820/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-be6428fe-c87a-47d7-9e7b-24fa559e52f6/motot_2D00_board_2D00_mod2.jpg" width="320" /></p><img src="https://community.element14.com/aggbug?PostID=28854&AppID=86&AppType=Weblog&ContentType=0" width="1" height="1">