MCIMX281AVM4B Freescale Semiconductor, MCIMX281AVM4B Datasheet - Page 1963

• 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

Freescale Semiconductor, Inc.
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
Figure 31-3. USB 2.0 USB PHY Startup Flowchart
Set HW_POWER_DEBUG_VBUSVALIDPIOLOCK
Set HW_CLKCTRL_PLLCTRL0_EN_USB_CLKS
Clear HW_CLKCTRL_CLKSEQ_BYPASS_CPU
Set HW_POWER_DEBUG_AVALIDPIOLOCK
Set HW_POWER_DEBUG_BVALIDPIOLOCK
NO
Set HW_CLKCTRL_CPU_DIV_CPU=400
Set HW_CLKCTRL_PLLCTRL0_POWER
Clear HW_USBPHY_CTRL_CLKGATE
Clear HW_POWER_CTRL_CLKGATE
Clear HW_USBPHY_CTRL_SFTRST
Set HW_POWER_STS_VBUSVALID
Set HW_CLKCTRL_GPMI_DIV=400
Set HW_CLKCTRL_XBUS_DIV=20
Set HW_CLKCTRL_XBUS_DIV=1
Set HW_POWER_STS_BVALID
Set HW_POWER_STS_AVALID
Clear HW_USBPHY_PWD
HW_CLKCTRL
PHY Startup
PLLCTRL1_
LOCK==1
_
YES
Chapter 31 USB High-Speed On-the-Go Host Device Controller
Set CPU Clock to 1.2 MHz
Set GPMI Clock to 1.2 MHz
Make sure XBUS is lower than HBUS
Power on PLL
Switch to PLL from Crystal
Device and Host operation not OTG
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