MCIMX286CVM4B Freescale Semiconductor, MCIMX286CVM4B Datasheet - Page 937

• 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

11.12.15 Battery Level Monitor Register (HW_POWER_BATTMONITOR)
This register provides brownout controls and monitors the battery voltage.
Address:
Freescale Semiconductor, Inc.
Reset
Reset
BRWNOUT_PWD
BATTBRNOUT_
BATTBRNOUT
5VDETECT_
EN_BATADJ
BATT_VAL
Bit
Bit
W
W
RSRVD3
RSRVD2
ENABLE
R
R
PWDN_
PWDN_
31 26
25 16
15 12
Field
11
10
9
8
31
15
0
0
HW_POWER_BATTMONITOR
40E0h
30
14
RSRVD2
0
0
Reserved.
Software should be configured to place the battery voltage in this register measured with an 8-mV LSB
resolution through the LRADC.This value is used by the DC-DC converter and must be correct before setting
EN_BATADJ.
Reserved.
Enable the use of the programmed 5V detect signal to gate off the powering down of the device when a
battery brownout occurs. Clear this bit to power-down the device when a battery brown-out occurs regardless
of the state of the 5
V detect signal.
This bit enables the DC-DC to improve efficiency and minimize ripple using the information from the
BATT_VAL field. It is very important that BATT_VAL contain accurate information before setting EN_BATADJ.
Note: HW_LRADC_CONVERSION_SCALE_FACTOR must be programmed to 0x2 before setting this bit
to 0x1.
Powers down the device after the DC-DC converter completeS startup if a battery 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 battery brownout and the battery brownout interrupt is enabled.
Power-down circuitry for battery brownout detection. This bit should only be set when it is not important to
montior battery brownouts and minimum system power consumption is required.
29
13
RSRVD3
0
0
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
HW_POWER_BATTMONITOR field descriptions
28
12
0
0
27
11
0
1
26
10
0
0
8004_4000h base + E0h offset = 8004_
25
0
1
9
24
0
0
8
Description
23
0
0
7
RSRVD1
22
0
0
6
BATT_VAL
21
0
5
0
20
0
4
0
Chapter 11 Power Supply
19
BRWNOUT_LVL
0
0
3
18
0
0
2
17
0
0
1
16
0
0
0
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