Timeline for 3.3V I2C Logic on 1.8V Device
Current License: CC BY-SA 4.0
3 events
| when toggle format | what | by | license | comment | |
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| Nov 23, 2019 at 22:33 | comment | added | Spehro 'speff' Pefhany | That's my best guess. I don't see anything that exactly confirms it (logic levels could still be Vddio with it being 3.3V tolerant) , but the error theory fits your observations and it's hard to imagine what else would cause that. | |
| Nov 23, 2019 at 22:13 | comment | added | M.Schindler | I was scared that it was a mistake in the datasheet. On page 34 of the datasheet, it states "The ICM-20789 supports I2C communications on its serial interface. The ICM-20789’s I/O logic levels are set to be VDDIO" It also shows a simplified schematic that appears to contradict the schematic that I have posted. So without a level shifter, the device cannot have I/O level of 3.3V? | |
| Nov 23, 2019 at 11:19 | history | answered | Spehro 'speff' Pefhany | CC BY-SA 4.0 |