MCIMX286CVM4B Freescale Semiconductor, MCIMX286CVM4B Datasheet - Page 1105

• Manufacturer Part Number: MCIMX286CVM4B
• Description: IC MPU I.MX286 289MAPBGA
• Manufacturer: Freescale Semiconductor
• Series: i.MX28r

Specifications of MCIMX286CVM4B

• 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: Compliant

Using the “auto configure mode” help to eliminate the change of delay value because the
reference delay itself also changes along with environmental conditions.
14.7.10 Configure output enable of I/O Control
Some EMI I/Os require a control signal named "output enable". The I/O can drive signals
out only when the "output enable" signal is active. Refer to the figure below.
There are three kinds of output enable signals in this EMI design:
Freescale Semiconductor, Inc.
• Bypass mode, or manual configure mode
• io_dq_out_oen
• io_dqm_oen
• io_dqs_oen
calculated by multiplying the encoder [7:0] integer by the parameter settings for each
delay line and then dividing by 128 and rounding. These values are then encoded into
a one-hot counter and updated at initialization and at every refresh interval.
The phase-detector can be bypassed. The number of delay elements for read and write
delay-line is programmed manually.
output enable for write data.
output enable for write data mask. Please configure it exactly the same as io_dq_out_oen.
In case the number of delay elements is fixed, the actual delay
value (in nano-second) of a delay-line would change according
to the environmental conditions, such as voltage, temperature,
and so on.
io_dq_out
io_dq_out_oen
io_dqs_out
io_dqs_out_oen
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
Figure 14-14. EMI I/O Output Enable
NOTE
d0
d1
d2
Chapter 14 External Memory Interface (EMI)
d3
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