MCIMX281AVM4B Freescale Semiconductor, MCIMX281AVM4B Datasheet - Page 1555

• 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

Chapter 25 Controller Area Network (FlexCAN)
IDE ID Extended Bit
This bit identifies whether the frame format is standard or extended.
1 = Frame format is extended
0 = Frame format is standard
RTR Remote Transmission Request
This bit is used for requesting transmissions of a data frame. If FlexCAN transmits this bit
as '1' (recessive) and receives it as '0' (dominant), it is interpreted as arbitration loss. If this
bit is transmitted as '0' (dominant), then if it is received as '1' (recessive), the FlexCAN
module treats it as bit error. If the value received matches the value transmitted, it is
considered as a successful bit transmission.
1 = Indicates the current MB has a Remote Frame to be transmitted
0 = Indicates the current MB has a Data Frame to be transmitted
LENGTH Length of Data in Bytes
This 4-bit field is the length (in bytes) of the Rx or Tx data, which is located in offset $8
through $F of the MB space (see
Table
25-1). In reception, this field is written by the
FlexCAN module, copied from the DLC (Data Length Code) field of the received frame.
In transmission, this field is written by the CPU and corresponds to the DLC field value of
the frame to be transmitted. When RTR=1, the Frame to be transmitted is a Remote Frame
and does not include the data field, regardless of the Length field.
TIME STAMP Free-Running Counter Time Stamp
This 16-bit field is a copy of the Free-Running Timer, captured for Tx and Rx frames at the
time when the beginning of the Identifier field appears on the CAN bus.
PRIO Local priority
This 3-bit field is only used when LPRIO_EN bit is set in MCR and it only makes sense
for Tx buffers. These bits are not transmitted. They are appended to the regular ID to define
the transmission priority. See
Arbitration
Process.
ID Frame Identifier
In Standard Frame format, only the eleven most significant bits (28 to 18) are used for frame
identification in both receive and transmit cases. The 18 least significant bits are ignored.
In Extended Frame format, all bits are used for frame identification in both receive and
transmit cases.
DATA Data Field
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
Freescale Semiconductor, Inc.
1555