Samsung S5PC110 Manual page 1527

S5PC110_UM
SDO_ARMCGMS525
Word 0 of CGMS-A 525 Data
Bit
[1:0] Bit alignment of the Word 0 register is according to
their incoming order. The first incoming bit
becomes LSB, i.e. Word 0 [1:0] = {b1, b0}, where
bn represents data bit with their incoming order n.
The Word 0 data are used for display aspect ratio
control:
b1, b0 :
00 4:3 aspect ratio
01 16:9 aspect ratio
10 4:3 aspect ratio
11 reserved
Description
normal
anamorphic
letterbox
7 6BTVOUT & VIDEO DAC
Initial State
0
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