From b2ecaa64f0575844a21bd413d0b5b4e4aa242b4d Mon Sep 17 00:00:00 2001 From: krzychb Date: Fri, 2 Mar 2018 15:26:46 +0100 Subject: [PATCH] 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. --- docs/get-started/get-started-wrover-kit.rst | 3 +++ 1 file changed, 3 insertions(+) diff --git a/docs/get-started/get-started-wrover-kit.rst b/docs/get-started/get-started-wrover-kit.rst index 25948fc27..dc6e4edb6 100644 --- 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