2.10 Internal Control Registers
The TVP5146 decoder is initialized and controlled by a set of internal registers that define the operating parameters
of the entire decoder. Communication between the external controller and the TVP5146 decoder is through a
standard I
2
C host port interface, as described earlier. Table 2−11 shows the summary of these registers. Detailed
programming information for each register is described in the following sections. Additional registers are accessible
through an indirect procedure involving access to an internal 24-bit address wide VBUS. Table 2−12 shows the
summary of the VBUS registers.
NOTE:
Do not write to reserved registers. Reserved bits in any defined register must be written
with 0s, unless otherwise noted.
Table 2−11. Registers Summary
REGISTER NAME
Input select
AFE gain control
Video standard
Operation mode
Autoswitch mask
Color killer
Luminance processing control 1
Luminance processing control 2
Luminance processing control 3
Luminance brightness
Luminance contrast
Chrominance saturation
Chroma hue
Chrominance processing control 1
Chrominance processing control 2
Reserved
Component Pr saturation
Component Y contrast
Component Pb saturation
Reserved
Component Y brightness
Reserved
AVID start pixel
AVID stop pixel
HSYNC start pixel
HSYNC stop pixel
VSYNC start line
VSYNC stop line
VBLK start line
VBLK stop line
I2C SUBADDRESS
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
0Ah
0Bh
0Ch
0Dh
0Eh
0Fh
10h
11h
12h
13h
14h
15h
16h−17h
18h−19h
1Ah−1Bh
1Ch−1Dh
1Eh−1Fh
20h−21h
22h−23h
24h−25h
055h
325h
000h
040h
004h
007h
001h
015h
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
80h
R/W
80h
80h
80h
R/W
R/W
R/W
DEFAULT
00h
0Fh
00h
00h
23h
10h
00h
00h
02h
80h
80h
80h
00h
00h
0Eh
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R = Read only
W = Write only
R/W = Read and write
NOTE: Register addresses not shown in the register map summary are reserved and must not be written to.
2−23
TI [ TEXAS INSTRUMENTS ]
