MCIMX286CVM4B Freescale Semiconductor, MCIMX286CVM4B Datasheet - Page 927

• 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

11.12.9 DC-DC Converter 4.2V Control Register
This register contains controls that need to be adjusted to select the 4.2V source as the input
for the dcdc converter
Address:
Freescale Semiconductor, Inc.
Reset
Reset
ENABLE_ILIMIT
PULLDOWN_
BO_OFFSET
Bit
ENABLE_
Bit
W
W
RSRVD2
R
LINREG
R
ACTIVE
31 11
Field
TRG
7 5
4 0
10
9
8
15
31
0
0
DROPOUT_CTRL
HW_POWER_DCDC4P2
(HW_POWER_DCDC4P2)
14
30
0
0
RSRVD2[15:11]
Reserved.
Activates pulldown on external memory supply. This bit should be set before the regulator is enabled to be
sure the supply voltage powers up from ground. Default is pulldown inactive.
Controls the inrush limit (~10mA) for the memory supply voltage. Default is active. This should remain active
until the supply settles after enabling the linreg. This should be disabled before accessing the memory.
Enables the regulator that creates the external memory supply voltage. After enabling the linreg need to
wait until the VDDMEM rail is up before disabling the linreg current limit and accessing the memories. 500uS
is usually an adequate delay, but it can be longer if VDDMEM cap is >1uF.
Brownout voltage offset in 25mV steps below the TRG value. Note that the hardware only supports brownout
voltages between 1.1V and 1.75V, and values outside this range should not be programmed. The brownout
trip voltage will adjust as the target voltage changes.
Voltage level of the external memory supply. The step size of this field is 25 mV. 0x00 = 1.1 V, 0x1A...0x1F
= 1.75 V, and the reset value = 1.5 V.
13
29
0
0
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
HW_POWER_VDDMEMCTRL field descriptions
12
28
0
0
11
27
RSRVD5
0
0
8004_4000h base + 80h offset = 8004_4080h
10
26
0
0
25
THRESH
ISTEAL_
1
0
9
24
0
0
8
Description
23
0
0
7
BO_OFFSET
22
0
0
6
21
5
1
0
20
4
1
0
Chapter 11 Power Supply
19
0
0
3
TRG
18
0
0
2
TRG
17
0
0
1
16
0
0
0
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