MCIMX281AVM4B Freescale Semiconductor, MCIMX281AVM4B Datasheet - Page 1623

• 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

In the MAC is programmed to operate in half duplex mode, the MAC performed the
following additional action:
26.3.7.2 Collision Detection in Half Duplex Mode
If the packet is received with a collision detected during the reception of the first 64 bytes,
the packet is discarded (if frame size was less than ~14 octets) or transmitted to the user
application with an error and status bit ff_rx_err_stat(24) set to '1'.
Freescale Semiconductor, Inc.
• Terminate Pause Frames
• Check Frame Length
• Remove payload padding if it exists
• Calculate and verify CRC-32
• Write received Frames in the Core receive FIFO
• Check if the frame is received with a collision
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
Figure 26-12. MAC Receive Flow
discard
discard
discard
discard
Compare Destination Address
with locol/multicast/broadcast
discriminate length/type
verify frame length
and frame status
Detect Preamble
remove padding
receive payload
write data FIFO
information
verify CRC
Collision
Half Duplex only
Chapter 26 Ethernet Controller (ENET)
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