ESP_igrr wrote:That looks like the same arrangement of pins as in D2WD, is it not?
ESP32-D2WD’s pins GPIO16,GPIO17,SD_CMD,SD_CLK,SD_DATA_0 and SD_DATA_1 are used for connecting the embedded flash, and are not recommended for other uses.
i think this is the mistake ivan, there are 2 differ infos in the datasheet
- pins.jpg (19.11 KiB) Viewed 14399 times
and (small confuse ) shematic says this what you thinked,
and the other says
The integrated SPI flash is connected to GPIO6, GPIO7, GPIO8, GPIO9, GPIO10 and GPIO11
i think there is a mistake in one of this status.
a second hint/tip
if we compare order info D2WD and PICO-D4 as SIP
we get infos about
eMbeddedFlash 16Mbit ( pins you thinked ) and
SPI Flash ( 32Mbit ) from Document "Order info" ( offline just in time for revise )
- Flash-Diff.jpg (47.38 KiB) Viewed 14399 times
i tested only flash just in time, and there is GD Flash
packaged (SPI Flash) like in the prev post in this thread.
have not tested pSRAM (CS IO16, CLK IO17 ) and others just in time ( perhabs coming weekend ) but i think the "packaged" Flash is connected usually pins,
not sure, so please be careful with this
untested info: i think it is connected like a usually SPI flash.
( GPIO6, GPIO7, GPIO8, GPIO9, GPIO10 and GPIO11 )
the one thing what is differ is, that this
packaged SPI Flash is 3.3V and not 1.8V.
so if we share datalines with pSRAM later, then we damage not the packaged SPI Flash ( 3.3 ) with pSRAM (1.8 )
but in opposite direction the pSRAM (1.8) , so i will test first 3.3V pSRAM (32,64,128,256) then with this, like the
3.3V 64Mbit from lyontek in Wrover-Kit
i come back to this later again after more testings.
need no info can work on it like it is (do not worry)
just in time, the Documents of Pico Datasheet
and Order Info are offline ( in revise i think ).
best wishes
rudi