MCIMX281AVM4B Freescale Semiconductor, MCIMX281AVM4B Datasheet - Page 1652

• 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

MII Interface
Start
Load MMFR
Register
Read EIR
No
MII='1'
Yes
Figure 26-25. MDIO Access Overview
26.3.17.5 MDIO Buffer Connection
mdio_in
MDIO
mdio_out
mdio_oeN
Figure 26-26. MDIO Buffer Connection
26.3.18 MII Interface
26.3.18.1 Transmit
On Transmit, all data transfers are synchronous to tx_clk rising edge. The MII data enable
signal mii_tx_en is asserted to indicate the start of a new frame and remains asserted until
the last byte of the frame is present on mii_tx_d(3:0) bus. Between frames, mii_tx_en
remains de-asserted.
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
1652
Freescale Semiconductor, Inc.