SDA9410
Preliminary Data Sheet
Input signal processing
upper half of the input picture (AAFH) and the lower half of the input picture (AASH). If
one of both counter values is greater as 2*TH_MA_AA + 112, the SLAA and ELAA I²C
Bus parameters are set to their default values.
Output signals
SLAA=NALPIPM+PD
ELAA=2*ALPFIPM+SLAA-1
Status_SLAA=TRUE
Status_ELAA=TRUE
(AAFH or AASH) >= 2 * TH_MA_AA + 112
no change of the values
otherwise
Table 30
Correction of “start/end-line decision filter” block
It is possible to make the results of the letter box detection visible on screen in real time
to optimize the I²C Bus parameters. The figure below explains the different possibilities.
The I²C Bus parameter VOLBD can be used to switch on (VOLBD=1) or off (VOLBD=0)
the visibility function.
PANATV
PANATV
SLAA,
SLAA,
Status_SLAA=FALSE
Status_SLAA=TRUE
RELY=FALSE
RELY=FALSE
this is a
letter box
this is a
letter box
ELAA,
ELAA,
Status_ELAA=TRUE
Status_ELAA=FALSE
PANATV
PANATV
SLAA,
SLAA,
Status_SLAA=FALSE
Status_SLAA=TRUE
RELY=TRUE
RELY=TRUE
this is a
letter box
this is a
letter box
ELAA,
ELAA,
Status_ELAA=FALSE
Status_ELAA=TRUE
Figure 22
Visibility of letter box detection I²C Bus parameters
49
Micronas
MICRONAS [ MICRONAS ]
