Re: Which pins to use for SD card acces? (SD/SPI vs HSPI/JTAG/SD vs VSPI/SPI-Mode)
Posted: Thu Jan 05, 2017 2:39 pm
Since the schematics of devKitJ V2 have been released we were about to take this as a reference. These schematics rise two questions for me: (find schematic screenshots attached)
- R_IO13 seams to be fitted with a pullup (R156) and a pulldown (R50) at the same time that does not make any sense for me
- R_IO12 pullup (R157) is NC, is this related to the Flash Voltage issue? How does this affect SD-functionality, could we also use the ESP32 internal pullup here?
What are the experiences with devKitJ V2 so far? (Especially regarding SD and JTAG)
EDIT: Added Schematic screenshots:
- R_IO13 seams to be fitted with a pullup (R156) and a pulldown (R50) at the same time that does not make any sense for me
- R_IO12 pullup (R157) is NC, is this related to the Flash Voltage issue? How does this affect SD-functionality, could we also use the ESP32 internal pullup here?
What are the experiences with devKitJ V2 so far? (Especially regarding SD and JTAG)
EDIT: Added Schematic screenshots: