MCIMX286CVM4B Freescale Semiconductor, MCIMX286CVM4B Datasheet - Page 922

• 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

Programmable Registers
922
PWDN_BRNOUT
DISABLE_FET
BO_OFFSET
STEPPING
DISABLE_
ENABLE_
LINREG_
RSRVD4
RSRVD3
RSRVD2
RSRVD1
OFFSET
LINREG
27 24
19 18
17 16
15 11
Field
10 8
TRG
7 5
4 0
23
22
21
20
Reserved.
Powers down the device after the DC-DC converter completes startup if a VDDD brownout occurs. This
function is only active when 5V is not present. Additionally, software should clear this bit and disable this
function after the system is configured for a VDDD brownout and the VDDD brownout interrupt is enabled.
Disables the default behavior of the voltage stepping algorithm when the TRG field is updated. By default,
the control loop steps sequentially through 25mV steps on both target and brownout voltage to minimize
transients during TRG adjustments.
When this bit is set, the entire target voltage and brownout adjustment takes place at one time, which will
speed transitions, but will result in increased supply transients as well as possible brownouts when the new
(TRG - BO_OFFSET) >= old TRG.Thus, it is recommended to change TRG by less than the (BO_OFFSET-2)
value when using DISABLE_STEPPING.This bit should be set high when powering VDDD from the integrated
linear regulators.
Enables the VDDD linear regulator converter when the switching converter is active. By default, the linear
regulator is not active when the switching converter is active.
Disable the VDDD switching converter output.
Reserved.
Number of 25mV steps between linear regulator output voltage and switching converter target.
00b = 0 steps, recommended when powering VDDD only from linear regulator and
ENABLE_DCDC=DCDC_XFER=0. It is also recommended to set DISABLE_STEPPING when powering
VDDD from the linear regulators.
01b = 1 step above.
10b = 1 step below (default), important when powering VDDD from DC-DC converter and linear regulator
simultaneously.
11b = 2 steps below.
Reserved.
Brownout voltage offset in 25mV steps below the TRG value. Note that the hardware only supports brownout
voltages between 0.8V and 1.475V, and values outside this range should not be programmed. The brownout
trip voltage will adjust as the target voltage changes.
Reserved.
Voltage level of the VDDD supply. The step size of this field is 25 mV. 0x00 = 0.8 V, 0x1F = 1.575 V, and
the reset value = 1.2 V. This field should not be set above the VDDD operating maximum voltage as specified
in the Datasheet. It is also recommended to set DISABLE_STEPPING when powering VDDD from the
integrated linear regulators. Setting DISABLE_STEPPING does set additional restrictions on TRG adjusments.
HW_POWER_VDDDCTRL field descriptions (continued)
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
Description
Freescale Semiconductor, Inc.