MCIMX286CVM4B Freescale Semiconductor, MCIMX286CVM4B Datasheet - Page 930

• 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
11.12.11 DC-DC Duty Cycle Limits Control Register
This register defines the upper and lower duty cycle limits of DC-DC. These values depend
on details of switching converter implementation and should not be changed without guidance
from Freescale.
930
Reset
DELAY_TIMING
DISABLEFET_
SEL_PLLCLK
BO_LOGIC
FREQSEL
Bit
W
RSRVD2
R
TEST
Field
31 7
6 4
3
2
1
0
15
0
14
0
(HW_POWER_DCLIMITS)
Reserved.
This register will select the PLL-based frequency that the dcdc uses when SEL_PLLCLK is set high. The
decode is as follows:
0x0=Reserved
0x1=20MHz
0x2=24MHz
0x3=19.2MHz
0x4=14.4MHz
0x5=18MHz
0x6=21.6MHz
0x7=17.28Mhz
.
This bit can be used to enable/disable the logic which stops the power-FETs in the DC-DC converter from
switching when a brown-out condition is detected.
This bit delays the timing of the output fets in the switching dcdc converter. This may provide improved
ground noise performance in high power applications.
Reserved. Do not set.
This bit selects the source of the clock used for the DC-DC converter. The default is to use the 24-MHz
clock. Setting this bit selects the PLL clock as a clock source for the DC-DC converter. It is required to
program FREQSEL before setting this bit.
13
0
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
12
0
RSRVD2[15:7]
HW_POWER_MISC field descriptions
11
0
10
0
0
9
0
8
Description
0
7
0
6
FREQSEL
5
0
4
0
Freescale Semiconductor, Inc.
0
3
0
2
TEST
0
1
0
0