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5002B

Dual SCART A/V Switch

TDK Corporation 

AVPro® 5002B

Dual SCART A/V Switch

TV VIDEO MUTE

All TV video outputs can be simultaneously disabled

by programming the lower three (3) bits in Register 1.

The power-up default condition is xxxxx111, which

sets all TV video outputs to 0 VDC and switches the

TV audio outputs to Aux_Lin/Aux_Rin. Setting these

bits to xxxxx110 will also mute the TV video outputs

and switch the TV audio outputs to Lin/Rin.

AUXILIARY COMPOSITE OUTPUT

The auxiliary port includes a composite video output

pin (AUX_YCout) that is typically connected to the

“Video Out” pin on an auxiliary SCART connector.

Bits 3-5 in Register 1 determine the source for the

AUX_YCout pin. When these bits are set to

xx000xxx, the video source will be the Enc_B input.

When these bits are set to xx001xxx, the video

source will be the Enc_YC input.

AUXILIARY SVHS OUTPUT MODE

The device also includes an output pin (Aux_Cout)

that provides a chroma output to Pin 15 (RED) on

the auxiliary SCART connector. When connected

with the Aux_R pin, this forms a bi-directional port as

shown in the following diagram:

Aux_Cout

Auxiliary

Mux

SCART

62

Pin 15

Aux_R

Mux

Using this configuration, the device will support SVHS

mode for three encoder interface formats. The first

encoder interface format will receive chroma

information from the Enc_C pin and luma information

from the Enc_Y pin. This format is designated “SVHS,

Enc 1”. The second format will receive chroma

information on the Enc_B input and luma information

on Enc_G. This format is designated "SVHS, Enc 2".

The third format will receive chroma information from

the Enc_R pin and luma information from the Enc_G

pin. This mode is designated “SVHS, Enc 3” on the

serial port register table.

When the SVHS mode is selected, the DC restore on

the Aux_Cout pin will average to approximately 0.9

VDC at the video output load. The DC restore on the

Aux_YCout pin will set the blank level to 0.6 V at the

video output load.

AUXILIARY VIDEO MUTE

All auxiliary video outputs can be simultaneously

disabled by programming Bits 3-5 in Register 1. The

power-up default condition is xx111xxx, which sets all

auxiliary video outputs to 0 VDC and switches the

auxiliary audio outputs to Lin/Rin. Setting these bits to

xx110xxx will also mute the auxiliary video outputs.

FUNCTION SWITCHING

The device provides functions switching pins for

both the auxiliary (Aux_Fnc) and TV (TV_Fnc)

SCART ports. Both of these pins are bi-directional.

The direction of the pins is determined by setting bits

in Register 2 according to the following table:

Bits

xxxx00xx

xxxx01xx

xxxx10xx

xxxx11xx

Aux_Fnc

output

output

input

Passthru I/O

TV_Fnc

output

input

output

Passthru O/I

For the case where Register 2 is set to xxxx11xx,

the input signal on the Aux_Fnc pin is passed

directly through to the TV_Fnc pin as an output, or

vice versa. This mode is useful for supporting a

system power down mode where all signals from the

auxiliary port are passed directly through to the TV

port.

When a function pin is set as an input, the voltage

on that pin is applied to an internal comparitor. The

comparitor sense the voltage on the input pin and

sets the two (2) LSBs in the read register according

to the following table:

Input voltage

< 4.0 V

4.0 to 8.0V

>8.0 V

Bits

xxxxxx00

xxxxxx01

xxxxxx10

Function

Normal TV

16:9 aspect

Peritelevision

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