SDA9410
Preliminary Data Sheet
Application modes and memory concept
(X1,Y1)
UPBORDM
(X2,Y2)
RIBORDM
LEBORDM
LWBORDM
2a
2b
1
x = 32 * IPOSXM/8 + 4 * (IPOSXM modulo 8)
Figure 32
Explanation of memory management II
So the animation shown in the Figure 32 can be done in the following way. The picture
(boat) has at the beginning a defined size (defined by the I²C Bus parameters APPLM1,
ALPFM1, INTHM1, DEZHM1, INTVM1, DEZVM1) and the left upper corner of the picture
is located at the position (x1,y1) (defined by IPOSXM1, IPOSYM1). Specify the new
picture size. Set the corresponding I²C Bus parameters (APPLM2, ALPFM2, INTHM2,
DEZHM2, INTVM2, DEZVM2) to get the new picture size. Specify the new vertical and
horizontal position (x2,y2) (defined by IPOSXM2, IPOSYM2). Specify in addition the
amount of lines at the upper and lower edge, which has to be overwritten with border
values. In addition the amount of pixels at the left and right edge, which has to be
overwritten with border values (LWBORDM, UPBORDM, LEBORDM, RIBORDM). Send
the new values to the I²C interface. Remember that the reduction of the picture is limited
in horizontal and vertical direction, if the border should be overwritten with border colour.
The Figure 33 shows in detail what happens by means of a horizontal bar, which is
horizontally reduced. The width of the bar is 84 pixels (compare Figure 33). The position
x1, defined by IPOSX1 is for instance,
IPOSXM1=00001100b=12 => x1 = 32 * 1 + 4 * 4 = 48
The I²C Bus parameters LEBORDM and RIBORDM are both equal 0. The first block and
the last block are filled up with border values (black colour - background value).
The bar is compressed horizontally and the new width of the bar is 44 pixels. The new
position defined by IPOSX2 after the reduction step may be
IPOSXM2=00010001b=17=>x2 = 32 * 2 + 4 * 1 = 68.
That means the actual picture size is reduced for 40 pixels, 20 pixels at the left side (Left
Side = 68 - 48 = 20) and 20 pixels at the right side (Right Side = 132 - 20). Therefore the
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