Added a note how to modify ESP-WROVER-KIT V3 hardware to improve flash bus signal's integrity when using 80 MHz flash frequency. Due to length of the signal lines the flash mode QIO + 80M is not stable and may cause random exceptions on the ESP-WROVER-KIT.

krzychb · krzychb · commit b2ecaa64f057 · 2018-03-02T15:26:46.000+01:00
diff --git a/docs/get-started/get-started-wrover-kit.rst b/docs/get-started/get-started-wrover-kit.rst
@@ -225,6 +225,9 @@ SPI Flash / JP13
 | 6 | CMD / GPIO11 |
 +---+--------------+
 
+The module's flash bus is connected to the pin header JP13 through 0-Ohm resistors R140 ~ R145. If the flash frequency needs to operate at 80 MHz, to improve integrity of the bus signals, it is recommended to desolder resistors R140 ~ R145. At this point, the module's flash bus is disconnected with the pin header JP13.
+
+
 .. _get-started-esp-wrover-jtag-header:
 
 JTAG / JP8
