For SVGA (800×600) (FT81X only), the refresh rate is 60Hz (typical configuration).
For WQVGA (480×272), the refresh rate is 60Hz (typical configuration). For QVGA (320X240), the refresh rate is 60Hz (typical configuration)
Depending on the display panel requirement, other values of refresh rates can be configured by adjusting PCLK_DIV, HCYCLE and VCYCLE registers.