MCIMX281AVM4B Freescale Semiconductor, MCIMX281AVM4B Datasheet - Page 1653
MCIMX281AVM4B
Manufacturer Part Number
MCIMX281AVM4B
Description
IC MPU I.MX28 1.2 289MAPBGA
Manufacturer
Freescale Semiconductor
Series
i.MX28r
Datasheets
1.MCIMX283DVM4B.pdf
(2327 pages)
2.MCIMX283DVM4B.pdf
(20 pages)
3.MCIMX281AVM4B.pdf
(72 pages)
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
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If a frame is received on the FIFO interface with an error (for example, Signal ff_rx_err
asserted) the frame is subsequently transmitted with the MII mii_tx_err error signal for one
clock cycle at any time during the packet transfer.
26.3.18.2 Transmit with Collision - Half Duplex
When a collision is detected during a frame transmission (MII signal mii_col asserted), the
MAC stops the current transmission, sends a 32-Bit jam pattern and re-transmits the current
frame (See section
26.3.18.3 Receive
On Receive, all signals are sampled on the rx_clk rising edge. The MII data enable signal
mii_rx_dv is asserted by the PHY to indicate the start of a new frame and remains asserted
until the last byte of the frame is present on mii_rx_d(3:0) bus. Between frames, mii_rx_dv
remains de-asserted.
Freescale Semiconductor, Inc.
Figure 26-29. MII Transmit Operation - Transmission with Collision
Figure 26-28. MII Transmit Operation - Errored Frame
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
Collision Detection in Half Duplex Mode
mii_tx_d(3:0)
mii_tx_d(3:0)
mii_tx_err
mii_tx_en
mii_tx_en
mii_tx_err
tx_dk
tx_clk
mii_tx_d(3:0)
Preamble
Preamble
mii_tx_err
mii_tx_en
Figure 26-27. MII Transmit Operation
mii_col
mii_crs
tx_clk
5
5
SFD
SFD
5
Jam
Chapter 26 Ethernet Controller (ENET)
for detail).
CRC-32
CRC-32
1653
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