Texas Instruments TVP5146EVM User Manual

Page 6

SLEU063

TVP5160EVM User’s Guide

2.5

VBI Decoder Interface

This interface provides a method of connecting an external VBI decoder module to the
TVP5160EVM via the H3 and H4 headers. The VBI decoder may be a closed-caption decoder,
teletext decoder, or any other VBI decoder currently available on the market that provides the
same signals. The pinout of the VBI decoder interface is provided below.

Table 3.

VBI Decoder Interface Pinout

Description

H3 Pin Number

H4 Pin Number

Tuner CVBS input (from tuner I/F)

CVBS input (from TVP5160EVM)

Analog RGB

11, 9, 7 (R, G, B)

HSYNC

VSYNC

FSS (for analog overlay)

Digital RGB

7, 9, 11 (DR, DG, DB)

SDA (I

C data)

SCL (I

C address)

FSO (for digital overlay)

GND

2, 5, 8, 12

5, 6

D5V

1-4

With this interface, there are two methods of overlaying the RGB character data output from the
VBI decoder onto the input signal to the TVP5160 decoder:

Analog RGB overlay

Digital RGB overlay

Separate sets of the RGB inputs are provided depending on which overlay method is preferred.
The analog RGB inputs are connected to the TVP5160 analog inputs as discussed in Section
2.1. The digital RGB inputs and FSO are connected to the digital R, G, and B inputs and FSO
which are shared with the C bus, C6-9, respectively.

2.6

Test Points and Jumpers

Various test points are available on the TVP5160EVM for the user. This includes the various
power supplies as well as a few GND test points. The primary test-point header is H6 and
provides access to the video data, video clocks, I

C, 5 V, and GND.

There are three jumpers available on the TVP5160 board that configure the power down mode,
I

C address select, and the FSS select. Each jumper is set by default in its preferred state for

the TVP5160EVM. Next to each jumper on the TVP5160 board is the silkscreen that describes
the two states of the jumper configuration.

If the I

C address is changed on either the TVP5160 board or the ADV7311 board while the

TVP5160EVM is powered up, then that device will not recognize the new I

C address. The reset

button on the TVP5160EVM must be pressed and WinVCC4 must be reconfigured for the new
I

C address.