MCIMX281AVM4B Freescale Semiconductor, MCIMX281AVM4B Datasheet - Page 18

• Manufacturer Part Number: MCIMX281AVM4B
• Description: IC MPU I.MX28 1.2 289MAPBGA
• Manufacturer: Freescale Semiconductor
• Series: i.MX28r

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

3.1.5
Table 21
3.1.6
There is no special power-up sequence. After applying 5 V or battery in any order, the rest of the power
supplies are internally generated and automatically come up in a safe way.
There is no special power-down sequence. 5 V or the battery can be removed at any time.
3.1.7
Because the i.MX28 is a PMU and an SoC, power-on reset is generated internally and there is no timing
requirement on external pins.
The i.MX28 can be reset by asserting the exernal pin RESETN for at least 100 mS and later deasserting
RESETN.
If the reset occurs while the device is only powered by the battery, then the reset kills all of the power
supplies and the system reboots on the assertion of PSWITCH. If auto-restart is set up ahead of time, the
system reboots immediately.
If the chip is powered by 5 V, then the reset serves to reset the digital sections of the chip. If the DCDC is
operating at the time of the reset, then power switches back to the default linear regulators powered by 5 V.
18
describes the core, clock, and module settings for the different power modes of the processor.
ARM Core
USB0 PLL (System PLL)
OSC24M
OSC32K
DCDC
RTC
Other Modules
RESETN
Power Modes
Supply Power-Up/Power-Down Requirements
Reset Timing
Core/Clock/Module
i.MX28 Applications Processors Data Sheet for Automotive Products, Rev. 0
At least 100ms
Table 21. Power Mode Settings
Figure 2. RESETN Timing
Deep-Sleep
Off
Off
Off
On
Off
On
Off
Standby
On/Off
Off
Off
On
On
On
On
Freescale Semiconductor
On/Off
Run
On
On
On
On
On
On