MCIMX281AVM4B Freescale Semiconductor, MCIMX281AVM4B Datasheet - Page 2074

• Manufacturer Part Number: MCIMX281AVM4B
• Description: IC MPU I.MX28 1.2 289MAPBGA
• Manufacturer: Freescale Semiconductor
• Series: i.MX28r

Specifications of MCIMX281AVM4B

• Core Processor: ARM9
• Core Size: 32-Bit
• Speed: 454MHz
• Connectivity: CAN, EBI/EMI, Ethernet, I²C, MMC, SmartCard, SPI, SSI, UART/USART, USB OTG
• Peripherals: DMA, I²S, LCD, POR, PWM, WDT
• Program Memory Size: 128KB (32K x 32)
• Program Memory Type: Mask ROM
• Ram Size: 32K x 32
• Voltage - Supply (vcc/vdd): 1.25 V ~ 5.25 V
• Data Converters: A/D 17x12b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 289-LFBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of I /o: -
• Eeprom Size: -
• Lead Free Status / Rohs Status: Supplier Unconfirmed

DOTCLK
Operation
33.2.8 DOTCLK Interface
The DOTCLK interface is another mode used in moving picture displays. It includes the
VSYNC, HSYNC, DOTCLK and (optional) ENABLE signals. The interface is popularly
called the RGB interface if the ENABLE signal is present.
Figure 33-13
ENABLE
The DOTCLK mode writes data at high speed to the LCD, and the display operation is
synchronized with the VSYNC, HSYNC, ENABLE and DOTCLK signals. The polarities,
periods and pulse-widths of the sync signals are programmable using the
HW_LCDIF_VDCTRL0–4 registers. The units for the VSYNC signal must be number of
horizontal lines and can be selected using the VSYNC_PULSE_WIDTH_UNIT and
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HSYNC
VSYNC
D7-D0
VSYNC Pulse Width
VSYNC Wait Count
Vertical Back Porch
shows the DOTCLK protocol with its programmable parameters.
Figure 33-13. LCD Interface Signals in DOTCLK Mode
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
HSYNC
DOTCLK
ENABLE
D7-D0
HSYNC Wait Count
HSYNC Pulse Width
One Frame (VSYNC) Period
Vertical Valid Data Count
Horizontal Valid Data Count
One Line (HSYNC) Period
Freescale Semiconductor, Inc.
Vertical Front Porch
DOTCLK_POL = 0
VSYNC_POL = 0
HSYNC_POL = 0
ENABLE_POL = 0