Datasheet

TVP5154A
SLES214C–DECEMBER 2007–REVISED SEPTEMBER 2010 www.ti.com
7.3.7 Vertical Scaling Field 2 Control
Address 3A9h
Default 0h
7 6 5 4 3 2 1 0
V_Field2[7:0]
15 14 13 12 11 10 9 8
Reserved V_Field2[8]
Vertical scaling initial value in field 2 [8:0]: Initial value of vertical accumulator for field 2
For NTSC:
V_Field2 = (Vdesired/Vactive) × 256
For PAL:
V_Field2 = (1.5 × V_Field1) – 128
If V_Field 2 is negative, add V_Field1 to V_Field2 and add V_Field1 to V_Field1 until V_Field2 is positive.
7.3.8 Scaler Output Active Pixels
Address 3ABh
Default 2D0h
7 6 5 4 3 2 1 0
SCAL_PIXEL[7:0]
15 14 13 12 11 10 9 8
Reserved SCAL_PIXEL[9:8]
SCAL_PIXEL [9:0]: Scaler active pixel outputs per line
7.3.9 Vertical Scaling Control
Address 3ACh
Default 2100h
7 6 5 4 3 2 1 0
VERT_COEF[7:0]
15 14 13 12 11 10 9 8
Reserved 1 Enable Reserved VERT_COEF[8]
Enabled: Enable vertical and horizontal scaler
0 = Disable scaler (default)
1 = Enable scaler
VERT_COEF [8:0]: Vertical scaling coefficient
VERT_COEF = (Vdesired/Vactive) × 256
7.3.10 Horizontal Scaling Control
Address 3ADh
Default 400h
7 6 5 4 3 2 1 0
HORZ_COEF[7:0]
15 14 13 12 11 10 9 8
Reserved HORZ_COEF[14:8]
HORZ_COEF[14:0]: Horizontal scaling coefficient, MSB five bits are integer values and LSB ten bits are fraction numbers.
HORZ_COEF = Hactive/Hdesired
78 Internal Control Registers Copyright © 2007–2010, Texas Instruments Incorporated
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