Texas Instruments AM335 Series Technical Reference Manual

LCD_PCLK +
LCD_CLK
CLKDIV
PixelClockDerived
fromLCD_CLK
HSYNC/LineClock
VSYNC/FrameClock
LCD
Controller
Display
LCD_CLK
Functional Description www.ti.com
13.3 Functional Description
13.3.1 Clocking
This section details the various clocks and signals. Figure 13-3 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 Figure 13-3). 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
Submit Documentation Feedback
Copyright © 2011–2013, Texas Instruments Incorporated

Texas Instruments AM335 Series Specifications

General

Brand	Texas Instruments
Model	AM335 Series
Category	Computer Hardware
Language	English