MCIMX286CVM4B Freescale Semiconductor, MCIMX286CVM4B Datasheet - Page 898

• 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

DC-DC Converters
configuration is complete, as shown in
Figure
11-2. System configuration generally includes
setting up brownout detection thresholds on the supply voltages, battery, and so on to obtain
the desired system operation as the battery or power source is depleted or removed.
Typically, each output target voltage is set to some voltage margin above the minimum
operating level through the TRG field in HW_POWER_VDDDCTRL,
HW_POWER_VDDACTRL, HW_POWER_VDDIOCTRL, and
HW_POWER_VDDMEMCTRL registers. The brownout detection threshold is also set
through the BO_OFFSET field in same three registers. The BO_OFFSET field determines
how far the brownout voltage is below the output target voltage for each supply and might
typically be set 75–100 mV below the target voltage. If the voltage drops to the brownout
detector's level, then it optionally triggers a CPU Fast Interrupt (FIQ). The CPU can then
alleviate the problem and/or shut down the system elegantly. See i.MX28 Datasheet for
suggested voltage settings for the supply and brownout targets for different operating
frequencies.
To eliminate false detection, the brownout circuit filters transient noise above 1 MHz. Any
system with an i.MX28 should include at least 33 μF of decoupling capacitance on VDDIO,
VDDA and VDDD power rails. The capacitors should be arranged to filter supply noise in
1 MHz and higher frequencies.
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
898
Freescale Semiconductor, Inc.