MCIMX286CVM4B Freescale Semiconductor, MCIMX286CVM4B Datasheet - Page 1939

• 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

30.2 Operation
Control data is written to the Application UART line control register. This register defines:
If USE_LCR2 is set, the Application UART Line Control Register applies to the receive
operation, and similar control data written to the Application UART Line Control 2 Register
applies to the transmit operation.
30.2.1 Fractional Baud Rate Divider
The baud rate divisor is calculated from the frequency of UARTCLK and the desired baud
rate by using the following formula:
The divisor must be between 0x000000EC and 0x003FFFC0, inclusive. Program the lowest
6 bits of the divisor into BAUD_DIVFRAC, and the next 16 bits of the divisor into
BAUD_DIVINT.
30.2.2 Automatic Baud Rate Detection
The receive baud rate can be automatically detected by the Application UART.
Some UART protocol are based on packets of frames with the first 1 or 2 frames being
reference frames for baud detection. The UARTAPP detection logic is capable of starting
in the middle of a RX packet and find the reference frame at the start of the next packet,
then set the corresponding baud rate for the remainder of the packet. Note, the RXD is gated
off to the UART Receiver module until the reference frames are detected. So, the reference
frames are stripped from the packet and absent from the RXFIFO.
Freescale Semiconductor, Inc.
• Transmission parameters
• Word length
• Buffer mode
• Number of transmitted stop bits
• Parity mode
• Break generation
• Baud rate divisor
divisor = (UARTCLK * 32) / baud rate, rounded to the nearest integer
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
Chapter 30 Application UART (AUART)
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