38.7.81 Overlay 2 Configuration Register 9
| Name: | LCDC_OVR2CFG9 |
| Offset: | 0x000002B0 |
| 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 | |
| DSTKEY | REP | DMA | |||||||
| Access | R/W | R/W | R/W | ||||||
| Reset | 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 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. |