MCIMX286CVM4B Freescale Semiconductor, MCIMX286CVM4B Datasheet - Page 2120

• Manufacturer Part Number: MCIMX286CVM4B
• Description: IC MPU I.MX286 289MAPBGA
• Manufacturer: Freescale Semiconductor
• Series: i.MX28r

Specifications of MCIMX286CVM4B

• 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: Compliant

Operation
34.2 Operation
The PXP operates by rendering the output frame buffer in 8x8 or 16x16 pixel macroblocks
in display order (left to right, then top to bottom). At each output macroblock location, the
PXP determines whether the S0 buffer is visible based on the cropping register and S0 offset
parameters. If the S0 plane is visible, the PXP will fetch and process the required data from
the S0 image, otherwise, the S0's contribution to the output macroblock will be the
S0BACKGROUND register value. This value is effectively the color of the letterboxed
region or background color.
The PXP will also determine if an overlay is present for that macroblock location, and if
so, instruct the S1 buffer to fetch the required data. If multiple overlays cover the macroblock,
the PXP will select only the lowest numbered overlay and direct the S1 buffer to load the
data for this overlay. For areas with no overlays, the S1 buffer contributes nothing to the
rendered image. The following figure shows the order in which the output blocks are
generated (blocks 0, 1, 2) and indicates how various blocks are rendered (blocks A-E).
Figure 34-3. Pixel Pipeline (PXP) Macro Blocks
It is important to understand how the PXP renders each output macroblock to properly
understand how it accomplishes cropping, letterboxing, and overlay blending. The following
sections will provide more details on these operations.
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
2120
Freescale Semiconductor, Inc.