MCIMX281AVM4B Freescale Semiconductor, MCIMX281AVM4B Datasheet - Page 899
MCIMX281AVM4B
Manufacturer Part Number
MCIMX281AVM4B
Description
IC MPU I.MX28 1.2 289MAPBGA
Manufacturer
Freescale Semiconductor
Series
i.MX28r
Datasheets
1.MCIMX283DVM4B.pdf
(2327 pages)
2.MCIMX283DVM4B.pdf
(20 pages)
3.MCIMX281AVM4B.pdf
(72 pages)
Specifications of MCIMX281AVM4B
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
Supplier Unconfirmed
- Current page: 899 of 2327
- Download datasheet (17Mb)
11.2.1.2 DC-DC Extended Battery Life Features
The DC-DC converter has several other power-reducing programmable modes that are
useful for maximizing battery life:
Freescale Semiconductor, Inc.
• Li-Ion Buck/Boost The Li-Ion battery configuration supports buck/boost operation,
which means that a VDDIO voltage can be supported which is higher than the input
Li-Ion battery voltage. This is important to maximize the battery life in all applications,
but is crucial in hard drives that have large transient current requirements.
(HW_POWER_5VCTRL_PWDN_5VBRNOUT=1)
HW_POWER_STS_VDD5V_GT_VDDIO=0
HW_POWER_STS_VDD5V_GT_VDDIO) &
Set up IRQ for VDDIO5V plug in.
HW_POWER_CTRL_POLARITY
HW_POWER_5VCTRL_PWDN
HW_POWER_CTRL_ENIRQ
_VDD5V_GT_VDDIO=1
_VDD5V_GT_VDDIO=1
_5VBRNOUT=1
(On falling edge of
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
Reset
Unplug =
Figure 11-2. Brownout Detection Flowchart
HW_POWER_CTRL_ENIRQBATT_BO=1
reset or continue
HW_POWER_BATTMONITOR_PWDN
Do you want to
on a future
plugin?
HW_POWER_BATTMONITOR_PWDN_BATTBRNOUT=1
_BATTBRNOUT=0
Continue
HW_POWER_5VCTRL_PWDN_5VBRNOUT=1
_PWDN_5VBRNOUT=0
HW_POWER_5VCTRL
HW_POWER_5VCTRL
Unplug=1
HW_POWER_BATTMONITOR_BATT_VAL.
_ENABLE_DCDC=1
VDD5V_GT_VDDIO=1
HW_POWER_STS_
HW_POWER_BATTMONITOR_EN
Enable LRADC to measure battery
(any instance)
Set up battery brownout code.
Base State Defaults:
and put value into
Application
_BATADJ=1
ROM
Bist
Off
(PSWITCH or RTC wakeup or HW_POWER_STS_VDD5V_GT_VDDIO=1)
Brownout=1
(interrupt-driven event)
HW_POWER_5VCTRL_PWDN_5VBRNOUT=0
5V Device Plugin
HW_POWER_5VCTRL_DCDC_XFER=1
HW_POWER_BATTMONITOR_PWDN
reset or continue
Do you want to
Configure* 5V unplug detection.
HW_POWER_STS_VDD5V_GT_VDDIO=1
on a future
unplug?
_BATTBRNOUT=1
Continue
(HW_POWER_STS_VDD5V_GT_VDDIO=0) &
(HW_POWER_BATTMONITOR_PWDN
(HW_POWER_STS_BATT_BO=1)
Reset
_BATTBRNOUT=1) &
Brownout =
_PWDN_5VBRNOUT=1
HW_POWER_5VCTRL
Chapter 11 Power Supply
899
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