ADE3700XT 查看數據表（PDF） - STMicroelectronics
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ADE3700XT Datasheet PDF : 89 Pages
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On-Screen Display (OSD)
Register Name
SRGB_GAMMA_B_GREEN_A
SRGB_GAMMA_B_GREEN_B
SRGB_GAMMA_B_GREEN_C
SRGB_GAMMA_B_BLUE_A
SRGB_GAMMA_B_BLUE_B
SRGB_GAMMA_B_BLUE_C
ADE3700
Table 20: sRGB Registers (Sheet 3 of 3)
Addr Mode Bits
0x0D25 R/W
[7:0]
0x0D26 R/W
[7:0]
0x0D27 R/W
[7:0]
0x0D28 R/W
[7:0]
0x0D29 R/W
[7:0]
0x0D2A R/W
[7:0]
Default
Description
0x0
Parametric Gamma A Green, Gamma
0x0
Parametric Gamma B Green, Contrast
0x0
Parametric Gamma C Green, Brightness
0x0
Parametric Gamma A Blue, Gamma
0x0
Parametric Gamma B Blue, Contrast
0x0
Parametric Gamma C Blue, Brightness
2.15
On-Screen Display (OSD)
The integrated On-Screen Display (OSD) controller is a character-based overlay with a high level of
features and over 100 kbits of on-board dedicated RAM storage.
q 15 row by 30 column character-mapped display
q Four user-definable windows
q 12x18-pixel characters with optional horizontal and vertical doubling on a row-by-row basis
q Two 16-entry 24-bit RGB user-definable color maps
q 192 RAM-based monochrome 1 bpp characters
q 64 RAM-based graphics 4 bpp characters
q Text character attributes: foreground/background color, blinking
q Graphics character attributes: per-pixel color, vertical/horizontal mirroring
q Row attributes: double width, double height
q Window attributes: window visibility, position, size, border shadow, color table
q Global attributes: OSD visibility, OSD screen position, alpha fade in/fade out, global size
doubling, rotation in ninety-degree increments
q Single-bit enable/disable
For information on OSD programming, see the OSD Programming Manual.
2.15.1 OSD Access via I2C
The OSD uses a dedicated memory space that is accessed through an I2C port. The data stream
sent to the OSD register starts with two header bytes. These specify the type of transfer and the
row/column position for screen map transfers, the character index for font definition transfers, or the
color index for color map transfers.
A stream of OSD writes to the OSD I2C register can fill in a segment of the OSD memory space with
an internal auto-incrementing index register. The protocol is as follows:
1. Issue a start sequence with the R/W bit set to W.
2. Write to the OSD register. The first byte transferred is the index of the first internal OSD
register to be written. The next byte contains the data to be written to that register. Subsequent
bytes are written to successive internal OSD registers.
3. Continue writing data bytes until the desired range of OSD internal registers has been written
(the ADE3700 device will issue an ACK on each transfer).
4. Issue an I2C stop sequence.
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