Datasheet
893
SAM9263 [DATASHEET]
Atmel-6249N-ATARM-SAM9263-Datasheet_14-Mar-16
These parameters are different for the different configurations of the LCD Controller and are shown in Table 43-2.
43.5.2.3 FIFO
The FIFO block buffers the input data read by the DMA module. It contains two input FIFOs to be used in Dual
Scan configuration that are configured as a single FIFO when used in single scan configuration.
The size of the FIFOs allows a wide range of architectures to be supported.
The upper threshold of the FIFOs can be configured in the FIFOTH field of the LCDFIFO register. The LCDC core
will request a DMA transfer when the number of words in each FIFO is less than FIFOTH words. To avoid
overwriting in the FIFO and to maximize the FIFO utilization, the FIFOTH should be programmed with:
FIFOTH = 2048 - (2 x DMA_BURST_LENGTH + 3)
where:
2048 is the effective size of the FIFO. It is the total FIFO memory size in single scan mode and half that size
in dual scan mode.
DMA_burst_length is the burst length of the transfers made by the DMA
43.5.2.4 Serializer
This block serializes the data read from memory. It reads words from the FIFO and outputs pixels (1 bit, 2 bits, 4
bits, 8 bits, 16 bits or 24 bits wide) depending on the format specified in the PIXELSIZE field of the LCDCON2
register. It also adapts the memory-ordering format. Both big-endian and little-endian formats are supported. They
are configured in the MEMOR field of the LCDCON2 register.
The organization of the pixel data in the memory depends on the configuration and is shown in Table 43-4 and
Table 43-5.
Note: For a color depth of 24 bits per pixel there are two different formats supported: packed and unpacked. The packed
format needs less memory but has some limitations when working in 2D addressing mode (See “2D Memory
Addressing” on page 910.).
Table 43-2. Datapath Parameters
Configuration
initial_latency cycles_per_dataDISTYPE SCAN IFWIDTH
TFT 9 1
STN Mono Single 4 13 4
STN Mono Single 8 17 8
STN Mono Dual 8 17 8
STN Mono Dual 16 25 16
STN Color Single 4 11 2
STN Color Single 8 12 3
STN Color Dual 8 14 4
STN Color Dual 16 15 6