SDA9410
Preliminary Data Sheet
Application modes and memory concept
Life picture
Still picture
1
5
2
3
Life picture
4
Figure 29
Example for animation
The I²C Bus parameters IPOSXM and IPOSYM or IPOSXS and IPOSYS, respectively,
specify the position of the left upper corner of a stored picture. The figure below explains
the functionality of the I²C Bus parameters. The whole memory is organized as blocks,
which have a width of 32 pixels. The position (x,y) defined by the I²C Bus parameters is
defined by the equation below:
IPOSXM
æ
ö
ö
Εx, yΦ = 32 · æ------------------------ + 4 · ΕIPOSXM modulo 8Φ, IPOSYM
8
Figure 30
Equation of the position of the left upper picture corner
The IPOSYM and IPOSYS I²C Bus parameter specify the vertical position with a
resolution of one line for 4:1:1 format and 2 lines for 4:2:0 format for the master and slave
channel, respectively. The 5 MSBs of the IPOSXM and IPOSXS defines the horizontal
position with a resolution of 32 pixels (block resolution). The 3 LSBs of IPOSXM and
IPOSXS are used for fine positioning of the picture in a block with a resolution of 4 pixels.
Due to the fact, that only blocks can be written to the memory, the pixels left of the fine
positioning are filled up with border values (border values are defined by YBORDERM/
YBORDERS, UBORDERM/UBORDERS, VBORDERM/VBORDERS). If the number of
pixels is smaller as 32 pixels (block size), the missing pixels of a block are also filled up
with border values.
71
Micronas
MICRONAS [ MICRONAS ]
