G2R-14-12VDC Datasheet, PDF (40/73 Pages) Texas Instruments – Ultralow Power NTSC/PAL/SECAM Video Decoder With RObust Sync Detector

2.20.23 Vertical Blanking Start Register
Address
18h
Default
00h
7
6
5
4
3
2
1
0
Vertical blanking start
Vertical blanking (VBLK) start:
0111 1111 = 127 lines after start of vertical blanking interval
0000 0001 = 1 line after start of vertical blanking interval
0000 0000 = Same time as start of vertical blanking interval (default) (see Figure 2−2)
1000 0001 = 1 line before start of vertical blanking interval
1111 1111 = 128 lines before start of vertical blanking interval
Vertical blanking is adjustable with respect to the standard vertical blanking intervals. The setting in this register
determines the timing of the GPCL/VBLK signal when it is configured to output vertical blank (see register 03h). The
setting in this register also determines the duration of the luma bypass function (see register 07h).
2.20.24 Vertical Blanking Stop Register
Address
19h
Default
00h
7
6
5
4
3
2
1
0
Vertical blanking stop
Vertical blanking (VBLK) stop:
0111 1111 = 127 lines after stop of vertical blanking interval
0000 0001 = 1 line after stop of vertical blanking interval
0000 0000 = Same time as stop of vertical blanking interval (default) (see Figure 2−2)
1000 0001 = 1 line before stop of vertical blanking interval
1111 1111 = 128 lines before stop of vertical blanking interval
Vertical blanking is adjustable with respect to the standard vertical blanking intervals. The setting in this register
determines the timing of the GPCL/VBLK signal when it is configured to output vertical blank (see register 03h). The
setting in this register also determines the duration of the luma bypass function (see register 07h).
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