Chrom-Art Accelerator™ controller (DMA2D) RM0090
344/1731 DocID018909 Rev 11
They are programmed through a set of control registers:
• DMA2D foreground memory address register (DMA2D_FGMAR)
• DMA2D foreground offset register (DMA2D_FGOR)
• DMA2D background memory address register (DMA2D_BGMAR)
• DMA2D background offset register (DMA2D_BGBOR)
• DMA2D number of lines register (number of lines and pixel per lines) (DMA2D_NLR)
When the DMA2D operates in register-to-memory mode, none of the FIFOs is activated.
When the DMA2D operates in memory-to-memory mode (no pixel format conversion nor
blending operation), only the FG FIFO is activated and acts as a buffer.
When the DMA2D operates in memory-to-memory operation with pixel format conversion
(no blending operation), the BG FIFO is not activated.
11.3.4 DMA2D foreground and background pixel format converter (PFC)
DMA2D foreground pixel format converter (PFC) and background pixel format converter
perform the pixel format conversion to generate a 32-bit per pixel value. The PFC can also
modify the alpha channel.
The first stage of the converter converts the color format. The original color format of the
foreground pixel and background pixels are configured through the CM[3:0] bits of the
DMA2D_FGPFCCR and DMA2D_BGPFCCR, respectively.
The supported input formats are given in Table 52: Supported color mode in input.
Table 52. Supported color mode in input
CM[3:0] Color mode
0000 ARGB8888
0001 RGB888
0010 RGB565
0011 ARGB1555
0100 ARGB4444
0101 L8
0110 AL44
0111 AL88
1000 L4
1001 A8
1010 A4
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