MCIMX286CVM4B Freescale Semiconductor, MCIMX286CVM4B Datasheet - Page 686

• 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
9.2.3.3 Input Interrupt Operation
Programming and controlling a digital pin as a GPIO interrupt input is accomplished by
programming the appropriate bits in six registers, as shown in the figure below.
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• After setting the HW_PINCTRL_MUXSELx register for GPIO, the
• The HW_PINCTRL_IRQSTATx register bit should then be cleared to ensure that there
• Setting the HW_PINCTRL_PIN2IRQx register bit will then set up the pin to be an
• At this point, if an interrupt event occurs on the pin, it will be sensed and recorded in
• However, the interrupt will not be communicated back to the interrupt collector until
HW_PINCTRL_IRQLEVELx and HW_PINCTRL_IRQPOLx registers set the interrupt
trigger mode. A GPIO interrupt pin can be programmed in one of four trigger detect
modes: positive edge, negative edge, positive level, and negative level triggered.
are no interrupts pending when enabled.
interrupt pin.
the appropriate HW_PINCTRL_IRQSTATx bit.
the HW_PINCTRL_IRQENx register bit is enabled.
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
Figure 9-3. GPIO Input Setup Flowchart
Read HW_PINCTRL_DINx register bit
Write zero to HW_PINCTRL_DOEx
register bit to ensure pin is selected
Write to HW_PINCTRL_MUXSELx
register bit to select pin as GPIO.
HW_PINCTRL_PULLx to enable
to get the value on the pin.
internal pull-up resistors.
If applicable, set bits in
as an input.
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