MCIMX281AVM4B Freescale Semiconductor, MCIMX281AVM4B Datasheet - Page 1958

• 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

Programmable Registers
1958
BAUD_DETECT_
START_BAUD_
START_WITH_
UPDATE_TX
REFCHAR1
REFCHAR0
TWO_REF_
DETECT
ENABLE
RUNBIT
CHARS
RSVD1
31 24
23 16
Field
15 5
4
3
2
1
0
Second reference character used in baud rate detection. During autobaud detection of the second reference
frame
is stripped from the incoming packet. So it will not appear in the RXFIFO. This field is ignored when
TWO_REF_CHARS is 0.
First reference character used in baud rate detection. During autobaud detection of the first reference frame
received
is not available for reading. It is stripped from the incoming packet, so the UART receiver does not get this
character and the RXFIFO is not updated.
Reserved, read as zero, do not modify.
Set this bit to 1 will cause the TX baud rate divisor to be updated when the RX baud rate divisor is updated
by the autobaud detection logic. This should not be set if it is possible that transmit function may be busy.
Set this bit to 1 when using 2 reference characters for baud detection, and set to 0 for 1 reference character.
Set this bit to 1 will cause the assertion of HW_UARTAPP_CTRL0_RUN to start the autobaud detection
logic.
Set this bit to 0 will cause the assertion of START_BAUD_DETECT to start the autobaud detection logic.
Set to 1 to start automatic baudrate detection. This bit is ignored when START_WITH_RUNBIT is set to 1.
Each time a 1 is written to START_BAUD_DETECT it toggles the read value if START_WITH_RUNBIT is
zero.
Enable automatic baudrate detection.
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
HW_UARTAPP_AUTOBAUD field descriptions
Description
Freescale Semiconductor, Inc.