Регистры H616: TV Encoder Front/Back Porch Register

TVE_014_REG

7.2.5. TV Encoder Front/Back Porch Register - адрес: 0x6520014 0x6524014 (смещение: 0x0014)

31 |•|•|•|•|•|•|•|•|•|•|•|•|•|•|•|•| 16
15 |•|•|•|•|•|•|•|•|•|•|•|•|•|•|•|•| 00

Unused

Bits 31 : 25

BACK_PORCH

Bits 24 : 16
R/W
0x76

Specify the width of the back porch in encoder clock cycles. Min value is
( 0x76 = burst_width+breeze_way+17)
8 bits unsigned integer.
20p mode, is 260
1080i/p mode, is 192

Unused

Bits 15 : 12

FRONT_PORCH

Bits 11 : 0
R/W
0x20

Must be even.
Specify the width of the front porch in encoder clock cycles. 6 bits unsigned even integer. Allowed range is 10 to 62.

In 1080i mode the value is 44.

Bit fields structure

typedef union tve_014_reg { struct { unsigned front_porch : 12; unsigned unused0 : 4; unsigned back_porch : 9; unsigned unused1 : 7; } b; unsigned long w; } TVE_014_REG