38.7.107 High-End Overlay Configuration Register 12
Name: | LCDC_HEOCFG12 |
Offset: | 0x000003BC |
Reset: | 0x00000000 |
Property: | Read/Write |
Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
Access | |||||||||
Reset |
Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
GA[7:0] | |||||||||
Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
VIDPRI | DSTKEY | REP | DMA | ||||||
Access | R/W | R/W | R/W | R/W | |||||
Reset | 0 | 0 | 0 | 0 |
Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
OVR | LAEN | GAEN | REVALPHA | ITER | ITER2BL | INV | CRKEY | ||
Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Bits 23:16 – GA[7:0] Blender Global Alpha
Global alpha blender for the current layer.
Bit 12 – VIDPRI Video Priority
Value | Description |
---|---|
0 |
OVR1 layer is above HEO layer. |
1 |
OVR1 layer is below HEO layer. |
Bit 10 – DSTKEY Destination Chroma Keying
Value | Description |
---|---|
0 |
Source Chroma keying is enabled. |
1 |
Destination Chroma keying is used. |
Bit 9 – REP Use Replication logic to expand RGB color to 24 bits
Value | Description |
---|---|
0 |
When the selected pixel depth is less than 24 bpp the pixel is shifted and least significant bits are set to 0. |
1 |
When the selected pixel depth is less than 24 bpp the pixel is shifted and the least significant bit replicates the msb. |
Bit 8 – DMA Blender DMA Layer Enable
Value | Description |
---|---|
0 |
The default color is used on the Overlay 1 Layer. |
1 |
The DMA channel retrieves the pixels stream from the memory. |
Bit 7 – OVR Blender Overlay Layer Enable
Value | Description |
---|---|
0 |
Overlay pixel color is set to the default overlay pixel color. |
1 |
Overlay pixel color is set to the DMA channel pixel color. |
Bit 6 – LAEN Blender Local Alpha Enable
Value | Description |
---|---|
0 |
Local alpha blending coefficient is disabled. |
1 |
Local alpha blending coefficient is enabled. |
Bit 5 – GAEN Blender Global Alpha Enable
Value | Description |
---|---|
0 |
Global alpha blending coefficient is disabled. |
1 |
Global alpha blending coefficient is enabled. |
Bit 4 – REVALPHA Blender Reverse Alpha
Value | Description |
---|---|
0 |
Pixel difference is multiplied by alpha. |
1 |
Pixel difference is multiplied by 1 - alpha. |
Bit 3 – ITER Blender Use Iterated Color
Value | Description |
---|---|
0 |
Pixel difference is set to 0. |
1 |
Pixel difference is set to the iterated pixel value. |
Bit 2 – ITER2BL Blender Iterated Color Enable
Value | Description |
---|---|
0 |
Final adder stage operand is set to 0. |
1 |
Final adder stage operand is set to the iterated pixel value. |
Bit 1 – INV Blender Inverted Blender Output Enable
Value | Description |
---|---|
0 |
Iterated pixel is the blended pixel. |
1 |
Iterated pixel is the inverted pixel. |
Bit 0 – CRKEY Blender Chroma Key Enable
Value | Description |
---|---|
0 |
Chroma key matching is disabled. |
1 |
Chroma key matching is enabled. |