System-in-Package
STM32MP2 + DDR4 in a Small Flexible Package
OSD32MP2 – STM32MP2, DDR, PMIC, EEPROM, Oscillator, Passives in a in a 21mm X 21mm Package
There has been multiple revisions to the OSDZU3-REF and some of the documentation is for specific revisions.
The revision of your OSDZU3-REF is printed under the fan next to the Octavo Systems logo. See the image below.
If there are multiple versions of a document make sure you select the one that matches your revision.