MCIMX286CVM4B Freescale Semiconductor, MCIMX286CVM4B Datasheet - Page 897

• 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

11.2 DC-DC Converters
The DC-DC converters efficiently scale battery voltage (or a regulated 4.2 V derived from
a 5 V source) to the required supply voltages. The DC-DC converters include several
advanced features:
11.2.1 DC-DC Operation
The i.MX28 DC-DC converter enables a low-power system and features programmable
output voltages and control modes. Most products adjust VDDD dynamically to provide
the minimum voltage required for proper system operation. VDDIO and VDDA are typically
set once during system initialization and not changed during operation.
11.2.1.1 Brownout/Error Detection
The power subsystem has several mechanisms active by default that safely return the device
to off state if any one of the following errors or brownouts occur:
All three mechanisms are active by default to ensure that the device always has a valid
transition to a known state in case the power source is unexpectedly removed before the
software has completed the system configuration. Software will typically disable the
functionality of PWDN_5VBRNOUT and PWDN_BATTBRNOUT after system
Freescale Semiconductor, Inc.
• Single inductor architecture
• Programmable output voltages
• Programmable brownout detection thresholds
• Pulse frequency modulation (PFM) mode for low-current load operation
• The crystal oscillator frequency is detected below a certain threshold This threshold
• The battery voltage falls below the battery brownout level (field BRWNOUT_LVL in
• 5 V is detected, then removed This feature is disabled by clearing
is process-and voltage-sensitive, but will always be between 100 KHz and 2 MHz. This
feature can be disabled in DISABLE_XTALOK field in HW_RTC_PERSISTENT0
register.
HW_POWER_BATTMONITOR) This feature is disabled by clearing
PWDN_BATTBRNOUT in the same register.
HW_POWER_5VCTRL_PWDN_5VBRNOUT.
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
Chapter 11 Power Supply
897