MCIMX286CVM4B Freescale Semiconductor, MCIMX286CVM4B Datasheet - Page 7

• 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

5
5.1
Freescale Semiconductor
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DRAM Memory
Each i.MX28 EMI supply pin and DRAM memory supply pin must have its own via. The via must
connect to a broad power plane which has (if possible) capacitors for each via. The more capacitors
the better.
One of the most critical issues is not the signal timing. It is power and/or GND bounce or noise due
to poorly supplied i.MX DRAM supply pins and/or DRAM memory supply pins. Something as
simple as the layout engineer using too few vias to connect the supply pins may cause the DRAM
memory interface to fail.
DRAM supply de-coupling
i.MX28 Layout and Design Guidelines, Rev. 0
DRAM Memory
7