MCIMX281AVM4B Freescale Semiconductor, MCIMX281AVM4B Datasheet - Page 934

• 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

Programmable Registers
934
Reset
VBUSVALID0_
VDDMEM_BO
THERMAL_
WARNING
PSWITCH
BVALID0_
Bit
AVALID0_
SOURCE
W
PWRUP_
RSRVD3
RSRVD2
R
STATUS
STATUS
STATUS
31 30
29 24
23 22
21 20
Field
19
18
17
16
15
15
0
14
0
Reserved.
These read-only bits determine which source was active when the dcdc converter powerup sequence was
complete. This can be used to determine what event caused the device to powerup.
bit5 : five volts
bit4 : rtc wakeup
bit3 : reserved
bit2 : reserved
bit1 : high level pswitch voltage
bit0 : midlevel pswitch voltage
Reserved.
These read-only bits reflect the current state of the pswitch comparators. The lsb is high when voltage on
the PSWITCH pin is above 0.8V, and the msb is high when the voltage on the PSWITCH pin is above 1.75V
Asserting this signal is a last warning to the cpu before the temp sensor shuts down the power system
. It will be asserted at a small temperature offset below the chip thermal limit.
Output of VDDMEM brownout comparator. High when a brownout is detected. This comparator's
power-up/power-down follows the VDDMEM regulator power-up.
Indicates VBus is valid for a A-peripheral. This bit is a read only version of the state of the analog signal. It
can not be overritten by software like the AVALID bit below.
Indicates VBus is valid for a B-peripheral. This bit is a read only version of the state of the analog signal. It
can not be overwritten by software like the BVALID bit below.
VBus valid for USB OTG. This bit is a read only version of the state of the analog signal. It can not be
overwritten by software like the VBUSVALID bit below.
13
0
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
12
0
HW_POWER_STS field descriptions
11
0
10
0
DC_
OK
1
9
0
8
Description
0
7
0
6
5
0
4
0
Freescale Semiconductor, Inc.
0
3
0
2
0
1
0
0