THMASK=BEATS_4
ISI Configuration 1 Register
| HSYNC_POL | Horizontal Synchronization Polarity  |  
| VSYNC_POL | Vertical Synchronization Polarity  |  
| PIXCLK_POL | Pixel Clock Polarity  |  
| GRAYLE | Grayscale Little Endian  |  
| EMB_SYNC | Embedded Synchronization  |  
| CRC_SYNC | Embedded Synchronization Correction  |  
| FRATE | Frame Rate [0…7]  |  
| DISCR | Disable Codec Request  |  
| FULL | Full Mode is Allowed  |  
| THMASK | Threshold Mask 0 (BEATS_4): Only 4 beats AHB burst allowed 1 (BEATS_8): Only 4 and 8 beats AHB burst allowed 2 (BEATS_16): 4, 8 and 16 beats AHB burst allowed  |  
| SLD | Start of Line Delay  |  
| SFD | Start of Frame Delay  |