WINC3400-known-issues

More info may be available via WINC3400 Harmony 3 release notes here

No.	Deliverable	ID	Issue / Limitation	Affected Version(s)	Fix Version(s)	Recommendation
1	WINC FW, driver and PC programming tools	-	If WINC flash is marginally programmed, possible WINC flash corruption may occur where random flash bytes can randomly show 0 or 1 logic upon flash read. Symptoms are that WINC part is unable to boot, unable to start, unable to complete initialization or hang during run time	A part that's running 1.2.2 FW/driver or older A part that's upgraded to any version using 1.2.2 or older built-in OTA A part that's upgraded to any version using 1.2.2 or older host driver SPI flash APIs A part that's upgraded to any version using 1.2.2 or older PC tools	WINC 1.2.3+ FW, driver and PC tools	Either of the following two actions/recommendations should be followed: WINC 1.2.3+ FW, driver and PC tools execute double programming to workaround any possible marginal programming. To protect a working WINC part or to recover a flash-corrupted WINC part, upgrade to 1.2.3+ FW and driver is needed. FW upgrade must be done using: PC tools from 1.2.3+ release package SPI flash APIs from 1.2.3+ host driver Note: OTA does not protect a working part against the possible flash corruption nor it recovers a flash-corrupted part Make sure that WINC VDDIO which supplies WINC flash voltage is stable all the time within the recommended operating range 2.7V - 3.6V (typical 3.3V)
2	WINC3400 FIRMWARE UPDATE PROJECT	-	Failure to use the board-specific XO offset stored in efuse when calculating lookup tables during image creation/flashing.This may result in sub-optimal RF performance.	FW Version 1.4.4	FW Version 1.4.4	The release zip WINC3400 FIRMWARE UPDATE PROJECT is updated with script "update_pll_table.bat" which will handle the extraction of XO offset from efuse, and ensure the value is used correctly during image creation.
3	SSL Demo of wifi_bypass_demos for SAMA5D27-SOM1-EK1 Host Device	-	User may face connectivity issue with the SSL demo of bypass mode	wireless_apps_winc3400 Version v3.7.1	wireless_apps_winc3400 Version v3.7.1	The following actions should be followed : Open MCC. Enable the "small stack support" in "wolfSSL Library" component of Project Graph. Increase the Heap size to 400000, in "System" component of Project Graph. Generate the code after making the above mentioned updates. Compile the code and load it into the board.