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S1D13706 Programming Notes and Examples

X31B-G-003-03 Issue Date: 01/02/23

In SwivelView 180°, program the start address

= ((desired byte address + (sub-window width

sub-window height

bpp

8))

4) - 1

In SwivelView 270°, program the start address

= (desired byte address + ((sub-window height - 1)

sub-window width

bpp

8))

Note

SwivelView 0° and 180° require the panel width to be a multiple of 32

bpp. Swivel-

View 90° and 270° require the panel height to be a multiple of 32

bpp. If this is not

possible, a virtual display (one larger than the physical panel size) is required which

does satisfy the above requirements. To create a virtual display, program the sub-win-

dow line address offset to values which are greater than that required for the given dis-

play width.

These registers indicate the number of dwords per line in the sub-window image.

number of dwords per line = image width

(32

bpp)

Note

The image width must be a multiple of 32

bpp.

REG[80h] Sub-Window Line Address Offset Register 0

Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

REG[81h] Sub-Window Line Address Offset Register 1

n/a n/a n/a n/a n/a n/a Bit 9 Bit 8

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