MCIMX286CVM4B Freescale Semiconductor, MCIMX286CVM4B Datasheet - Page 2036

• Manufacturer Part Number: MCIMX286CVM4B
• Description: IC MPU I.MX286 289MAPBGA
• Manufacturer: Freescale Semiconductor
• Series: i.MX28r

Specifications of MCIMX286CVM4B

• 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: Compliant

Operation
32.2.5.3 High-Speed Differential Driver
The high-speed differential driver receives a 17.78 mA current from the constant current
source and essentially steers it down either the USB_DP signal or the USB_DN signal or
alternatively to ground. This current will produce approximately a 400 mV drop across the
22.5
termination seen by the driver when it is steered onto one of the signal lines. The
approximately 17.78 mA current source is referenced back to the integrated voltage-band-gap
circuit. The Iref, IBias, and V to I circuits are shared with the integrated battery charger.
32.2.5.4 Switchable 1.5K USB_DP Pullup Resistor
The i.MX28 contains a switchable 1.5 K pullup resistor on the USB_DP signal. This
resistor is switched on to tell the host/hub controller that a full-speed-capable device is on
the USB cable, powered on, and ready. This resistor is switched off at power-on reset so
the host does not recognize a USB device until the processor software enables the
announcement of a full-speed device.
32.2.5.5 Switchable 15K USB_DP Pulldown Resistor
The i.MX28 contains a switchable 15 K pulldown resistor on both USB_DP and USB_DN
signals. This is used in host mode to tell the device controller that a host is present.
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
2036
Freescale Semiconductor, Inc.