/technologies/motors-and-drives/b/blog/posts/trinamic-stepper-motor-controller-tmc2300---c-custom-firmware-pt-3-try-to-replicate-evaluation-kit-conversationFollow up from Pt 2: Wire Up and Comms Analysis : I don&#39;t have good news yet. Even though the data I send looks like the data I captured from the evaluation kit, I haven&#39;t been able to get an answer from the TMC2300. Because I&#39;ve made ...en-USTelligent Community 12https://community.element14.com/technologies/motors-and-drives/b/blog/posts/trinamic-stepper-motor-controller-tmc2300---c-custom-firmware-pt-3-try-to-replicate-evaluation-kit-conversationMon, 17 Feb 2020 20:00:10 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:79016156-9925-41a3-a6b1-8fd4567f68d0Jan Cumps1<p>Side track: I&#39;ve prepared the board for power use measurement.</p><p>&nbsp;</p><p><span>[View:/resized-image/__size/496x854/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-79016156-9925-41a3-a6b1-8fd4567f68d0/contentimage_5F00_206156.png:496:854]</span></p><p>&nbsp;</p><p>When the motor is running, the power used by this IC will be in the noise.</p><p>But if the design is going to be powered from batteries, it makes sense to see its power profile while doing nothing for long times.</p><p>&nbsp;</p><p><span>[View:/resized-image/__size/385x345/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-79016156-9925-41a3-a6b1-8fd4567f68d0/contentimage_5F00_206157.png:385:345]</span></p><p>&nbsp;</p><p>I&#39;ve removed a 0 Ohm resistor in the current path (the one used to select 3.3 / 5 V operation) , and wired in a jumper.</p><p>When the circuit is brought out of standby, the circuit has 2 10K resistors in parallel. That takes 660 µA right at the start.</p><p>That&#39;s a fair part, given that I&#39;m trying to measure a 1.5 mA current. But I am not keen on fiddling with the standby mechanism, and cutting a trace after R315 is not easy on a PCB with white solder mask.</p><p><span>[View:/resized-image/__size/612x195/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-79016156-9925-41a3-a6b1-8fd4567f68d0/contentimage_5F00_206158.png:612:195]</span></p><p>At least we know where 0.67 mA of the current is consumed ...</p><p>&nbsp;</p><p> <span>[View:/resized-image/__size/294x243/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-79016156-9925-41a3-a6b1-8fd4567f68d0/contentimage_5F00_206159.png:294:243]</span><span>[View:/resized-image/__size/424x241/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-79016156-9925-41a3-a6b1-8fd4567f68d0/contentimage_5F00_206160.png:424:241]</span><span>[View:/resized-image/__size/315x239/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-79016156-9925-41a3-a6b1-8fd4567f68d0/contentimage_5F00_206161.png:315:239]</span></p><img src="https://community.element14.com/aggbug?PostID=8726&AppID=32&AppType=Weblog&ContentType=0" width="1" height="1">https://community.element14.com/technologies/motors-and-drives/b/blog/posts/trinamic-stepper-motor-controller-tmc2300---c-custom-firmware-pt-3-try-to-replicate-evaluation-kit-conversationSun, 16 Feb 2020 22:34:34 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:79016156-9925-41a3-a6b1-8fd4567f68d0DAB0<p>Good post Jan.</p><p>&nbsp;</p><p>DAB</p><img src="https://community.element14.com/aggbug?PostID=8726&AppID=32&AppType=Weblog&ContentType=0" width="1" height="1">