ADE3800 datasheet(62/138 Pages) STMICROELECTRONICS

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ADE3800

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Note:

The values wrap over FF: for example, a value of FF for GRADDELTA will decrease the color by 1 (if

GRADDELTA was 50: 50+FF=4F=GRADDELTA-1)

All kinds of color shades can be achieved by wisely using the above parameters.

4.11.3 8 x 8 Grid Layout with Optional Resets

A cell is a graphic element grouped by 8 in a grid. A set of 8 Grid Registers PGEN_GRID0 to

PGEN_GRID7 represents an 8x8 bitmap where each bit represents one rectangular cell: this

makes a total grid of 8x8 cells.

Each cell either displays the bar pattern defined above, or the input video signal, depending on the

value in its corresponding PGEN_GRID register:

All cells have the same size, defined by one horizontal and one vertical grid pitch registers

PGEN_GRID_X and PGEN_GRID_Y (16-bit wide).

Additionally, an offset in both directions can be programmed respectively in registers

PGEN_P0_WDTH_X_OFFSET and PGEN_P0_HGHT_Y_OFFSET. It shifts the top left corner (1st

cell of Grid 0) off the display area.

Note:

The offset value, for each direction, must be less than the corresponding cell size.

The actual number of displayed cells depends on the programmed cell size:

● If it makes the complete 8x8 grid bigger than the total display area, only the cells or part of

cells that are included in the display area are displayed. Any cell (on the right and bottom

sides) outside the display area is ignored and not displayed

Pixels by increasing numbers

Grid 0

Cell

PGEN or

video signal

Grid 1

Grid 2

Grid 3

Grid 4

Grid 5

Grid 6

Grid 7

MSB

LSB

ADE3800 数据表(PDF) 62 Page - STMicroelectronics

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