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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.

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krzychb
2018-03-02 15:26:46 +01:00
parent 37765d0071
commit b2ecaa64f0
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docs/get-started/get-started-wrover-kit.rst
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@@ -225,6 +225,9 @@ SPI Flash / JP13
| 6 | CMD / GPIO11 | | 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: .. _get-started-esp-wrover-jtag-header:
JTAG / JP8 JTAG / JP8