MCIMX281AVM4B Freescale Semiconductor, MCIMX281AVM4B Datasheet - Page 933

• 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

11.12.13 Power Subsystem Status Register (HW_POWER_STS)
This register contains status information for the battery charger, DCDC converter and
USB/OTG connections.
Address:
Freescale Semiconductor, Inc.
Reset
Bit
W
RSRVD2
RSRVD1
R
DC_FF
DC_R
DC_C
Field
10 8
7 4
3 2
1 0
11
31
RSRVD3
0
HW_POWER_STS
30
0
11: 8X increase
Reserved.
Two's complement feed forward step in duty cycle in the switching DC-DC converter. Each time this field
makes a transition from 0x0, the loop filter of the DC-DC converter is stepped once by a value proportional
to the change. This can be used to force a certain control loop behavior, such as improving response under
known heavy load transients.
Magnitude of proportional control parameter in the switching DC-DC converter control loop.
Reserved.
Ratio of integral control parameter to proportional control parameter in the switching DC-DC converter, and
can be used to optimize efficiency and loop response.
00: Maximum
01: Decrease ratio 2X
10: Decrease ratio 4X
11: Lowest ratio.
HW_POWER_LOOPCTRL field descriptions (continued)
29
0
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
28
0
PWRUP_SOURCE
8004_4000h base + C0h offset = 8004_40C0h
27
0
26
0
25
0
24
0
Description
23
RSRVD2
0
22
0
PSWITCH
21
0
20
0
Chapter 11 Power Supply
19
0
18
0
17
0
16
0
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