SDA9410-B13 Datasheet, PDF (36/179 Pages) Micronas – Display Processor and Scan Rate Converter using Embedded DRAM Technology Units

SDA9410
Preliminary Data Sheet
Input signal processing
5.4.2.2 Horizontal compression/expansion and panorama mode
The overall reduction of the horizontal compression block can be calculated by the
formula:
2 _I---_N-²---_T0----^4H---⁸--_M--- _D-----_E-----_Z1----_H----_M----
The user must specify the horizontal input picture size (defined by the I²C Bus parameter
APPLIPM/APPLIPS) and the horizontal output picture size (defined by the I²C Bus
parameter APPLM/APPLS) as well as the I²C Bus parameter INTHM/INTHS (I²C Bus
parameter, 07h, 08h, 29h, 2Ah) and DEZHM/DEZHS (I²C Bus parameter, 08h, 2Ah),
which can be calculated with the algorithm listed below (C-code).
intV, dezV: variables
for( intH=4*APPLM/S, dezH=1; intH<=4*APPLIPM/S; intH*=2, dezH*=2 )
;
intH = ((2048*4*APPLIPM/S*2+intH/2)/intH);
if( dezH>16)
{
intH= intH*dezH/16;
dezH=16;
}
INTHM/S = intH
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Micronas