Intel® Pentium® Silver and Intel® Celeron® Processors Datasheet, Volume 1


ID 633935
Date 17/06/2021 00:00:00
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GPIO Buffer Impedance Compensation via SD3_RCOMP

All GPIO buffers require impedance compensation for 1.8 V and 3.3 V operation. The impedance compensation is done via the SD3_​RCOMP signal. Therefore, SD3_​RCOMP signal must have a precision pull down resistor of 200 Ohm (1 %) to GND (regardless of SDXC being used or not). Without proper impedance compensation, the GPIO buffers, including the muxed native functions, may not operate as expected.