Texas Instruments TVP5146EVM - Manual (Page 5)

SLEU063
TVP5160EVM User’s Guide 5
Table 1. Analog Inputs and Pin Terminals
Input Type TVP5160 Pin(s)
CVBS VI_1
S-Video VI_3(Y), VI_9(C)
YPbPr VI_5(Y), VI_11(Pb), VI_8(Pr)
SCART VI_3(CVBS), VI_9(R), VI_6(G), VI_12(B)
Tuner interface (CVBS) VI_2
VBI decoder interface (analog RGB) VI_7(R), VI_4(G), VI_10(B)
2.2 Anti-Aliasing Filters
Each analog input has an anti-alias filter installed by default to ensure the input to the TVP5160
decoder is of the best quality and does not alias. The filters are elliptical in design in order to
minimize the cost and still provide the best roll-off. Details on the anti-aliasing filters, including
frequency response and the group delay, are provided in a separate application note.
The filter on any analog input may be bypassed by removing the 0-
?
resistors currently installed
(JP1-6, 9, 10) and shorting one of them across 1-2. Since the S-Video input is shared with the
SCART (CVBS and R), these inputs share the same anti-aliasing filters.
2.3 Analog Output
The analog output from the TVP5160 decoder is made available on the TVP5160EVM. The
output is buffered using a simple emitter follower and the output signal is automatically
determined by the TVP5160 decoder. If a CVBS is selected as the input, then the analog output
is the same looped-through CVBS output. If S-Video or YPbPr is the selected input, then only Y
is output since it contains the sync information. Typically, the analog output is used for VCR
record functions in some CE applications.
2.4 Tuner Interface
The tuner interface provides a method of connecting an analog TV tuner to the TVP5160EVM.
The expected output from the tuner module to the TVP5160EVM is baseband composite video.
Termination for the 75-
?
input source is already provided on the TVP5160EVM tuner input. The
pinout of the tuner interface is provided in Table 2.
Table 2. Tuner Interface Pinout (H2)
Description Pin Number
CVBS output (from tuner) 10
SDA (I 2 C data) 29
SCL (I 2 C address) 31
GND 1-9, 11-28, 30, 32-36
D5V 37-40
To supply the tuner module, D5V supply and GND pins are provided. The I
2
C pins, SDA and
SCL, are connected to the I 2 C communications bus on the TVP5160EVM. Control of the tuner
module is available within the TVP5160EVM software as discussed later.