Shouldn't ILI9341 SPI write speed be limited to 10MHz?

[KevScott]

If I look in the User_Setups/SetupX_Template.h file, section 4 says a 40MHz SPI speed should work fine for an ILI9341.

However, if I look at a datasheet for the device (for example https://cdn-shop.adafruit.com/datasheets/ILI9341.pdf seems to be an up to date version), it says on page 243 that the serial clock cycle period for a write (Twc) should be a minimum of 100ns which suggests a max SPI rate of 10MHz. Maybe there is something I am missing that would allow the 40MHz to be achieved, any clarification would be appreciated?

[Bodmer]

You can operate at lower clock rates if you wish. By experiment I found the displays work reliably at 65MHz but I usually run mine at 40MHz.

[KevScott]

Thanks for the quick reply. Great library by the way!