LCD_PCLK
+
LCD_CLK
CLKDIV
Pixel Clock Derived
from LCD_CLK
HSYNC/Line Clock
VSYNC/Frame Clock
LCD
Controller
Display
LCD_CLK
Functional Description
13.3 Functional Description
13.3.1 Clocking
This section details the various clocks and signals.
shows input and output LCD controller
clocks.
Figure 13-3. Input and Output Clocks
13.3.1.1 Pixel Clock (LCD_PCLK)
The pixel clock (LCD_PCLK) frequency is derived from LCD_CLK, the reference clock to this LCD module
(see
). The pixel clock is used by the LCD display to clock the pixel data into the line shift
register.
where CLKDIV is a field in the LCD_CTRL register and should not be 0 or 1.
•
Passive (STN) mode. LCD_PCLK only transitions when valid data is available for output. It does not
transition when the horizontal clock (HSYNC) is asserted or during wait state insertion.
•
Active (TFT) mode. LCD_PCLK continuously toggles as long as the Raster Controller is enabled.
1102
LCD Controller
SPRUH73H – October 2011 – Revised April 2013
Copyright © 2011–2013, Texas Instruments Incorporated