Hi
few weeks ago i got an email, that there is a guy, that have request samples
from a PSRAM manufacturer and if there comes samples, then he will share
if they send more as one
it was a long time cause one time the trader has shipped on wrong address and not to the guy.
so the manufacturer must send again to the trader for forwarding to the guy.
after this was done the guy send me again an email, that he get samples 3 peaces
and he will share to me one peaces ( how cool is that ? he got only 3 and he share to me from this one peaces - )
Today i got a parcel from switzerland and the guy did what he promissed.
i got today the long long waiting PSRAM in 3.3V and 64Mbit from Lyontek
it is the 64er L ( 3.3 ) version not S ( 1.8 ) version
so now, what i can do for the guy and you folks and me
i can test this on a Rev0 and Rev1 Silicon SoC ESP32.
First start was simple, does the 3.3V Version passes the ID Check.
This was done - and the ID Check passed successful
Then the next step was, to test this on a Rev1 and ... why not - i taked the Wrover-Kit where DOOM was run with 1.8V Flash and 1.8V ESP-PSRAM32 .
So i remove first the Case of wrover and saw, that the SoC was 112017 ( mmh ) and is still Rev1 ( mmh )
the next i remove the 1.8V ESP-PSRAM32 and the 1.8V Flash.
Then i solder the 3.3V PSRAM 64Mbit Version and a 3.3V Flash from a Wroom32
the MTDI ( IO12 ) was then pulled down ( GND )
cause there is 10K Ohm in the pulled up bootstrap line ( R9 )
checked then the fine 3.3V that comes from VDD_SDIO intern regulator
After this steps i flashed the DOOM Firmware and....
... it work's!
best wishes
rudi
sum:
- Wrover_3_3V_64Mbit_PSRAM_Mod.jpg (466.73 KiB) Viewed 14426 times