Datasheet

DescriptionResetTypeNameBit/Field
24-Bit TFT Mode
DescriptionValue
24-Bit TFT Mode disabled. Palette RAM lookup is used for
output pixel data.
0
24-Bit TFT Mode enabled. 24-bit data in TFT Active mode. The
format of the framebuffer data depends on TFT24UPCK.
1
0RWTFT2425
Frame Buffer Select
This mode is valid when LCDTFT is 0 and there are 16 bpp raw data
frame buffers (bpp=00)
Only for this case, this bit selects whether the frame buffer format is 16
bpp 565 or 12bpp.
The Grayscaler can only take 12 bits per pixel. The frame buffer data
is 16 bits per pixel 565 when FRMBUFSZ is set to 1 and only the 4 most
significant bits of each color component are sent to the Grayscaler input.
DescriptionValue
Framebuffer is 12 bpp packed in bits [11:0]0
Framebuffer is 16 bpp 5651
0RWFRMBUFSZ24
TFT Mode Alternate Signal Mapping for Palettized Framebuffer
This bit be 0 for all 12/16/24-bpp raw data formats. This bit can only be
1 for 1/2/4/8-bpp Palette Lookup data. Valid only in Active Matrix mode
when LCDTFT=1.
DescriptionValue
4 bits per component output data for 1, 2, 4, and 8 bpp modes
will be right aligned on LCDDATA[11:0]
0
4 bits per component output data for 1, 2, 4, and 8 bpp will be
converted to 5,6,5, format and use LCDDATA[15:0]={R3 R2
R1 R0 R3 G3 G2 G1 G0 G3 G2 B3 B2 B1 B0 B3}
1
0RWTFTMAP23
Nibble Mode
This bit is used to determine palette indexing and is used in conjunction
with RDORDER.
DescriptionValue
Nibble mode is disabled0
Nibble mode is enabled1
0RWNIBMODE22
Pallette Loading Mode
For Raw Data (12/16/24 bpp) frame buffers, no Palette lookup is
employed. Thus, these frame buffers use the Data-Only loading mode.
DescriptionValue
Palette and data loading, reset value0x0
Palette loading only0x1
Data loading only.0x2
0x0RWPALMODE21:20
1883December 13, 2013
Texas Instruments-Advance Information
Tiva
™
TM4C129XNCZAD Microcontroller