MCIMX255AJM4AR2 Freescale Semiconductor, MCIMX255AJM4AR2 Datasheet - Page 17

• Manufacturer Part Number: MCIMX255AJM4AR2
• Description: Processors - Application Specialized IMX25 1.2 AUTO
• Manufacturer: Freescale Semiconductor

Specifications of MCIMX255AJM4AR2

• Core: ARM926EJ-S
• Processor Series: MCIMX25
• Maximum Clock Frequency: 400 MHz
• Instruction / Data Cache Memory: 16 KB
• Data Ram Size: 128 KB
• Operating Supply Voltage: 1.15 V to 1.52 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: MAPBGA-400
• Interface Type: USB
• Memory Type: DDR2
• Minimum Operating Temperature: - 40 C

Figure 2
powered up. After Core VDD and NVDDx are stable, the analog supplies can be powered up.
3.2.2
There are no special requirements for the power-down sequence. All power supplies can be shut down at
the same time.
3.2.3
In order to guarantee DryIce power-loss protection, including retention of SRTC time data during power
down, users must do the following:
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1. Assert power on reset (POR).
2. Turn on NVCC_CRM.
3. Turn on QVDD digital logic domain supplies for not less than 1 ms and not more than 32 ms, after
4. Turn on other NVCCx digital I/O power supplies for not less than 1 ms and not more than 32 ms,
5. Turn on all other analog power supplies, including USBPHY1_VDDA_BIAS,
Place a proper capacitor on the NVCC_DRYICE output pin, and
Implement the below power-up/down sequence
NVCC_CRM reaches 90% of 3.3 V.
after QVDD reaches 90% of 1.2 V.
USBPHY1_UPLL_VDD, USBPHY1_VDDA, USBPHY2_VDD, NVCC_ADC,
OSC24M_VDD, MPPLL_VDD, UPLL_VDD, and FUSEVDD (FUSEVDD is tied to GND if
fuses are not programmed) for not less than 1 ms and not more than 32 ms, after NVCCx reaches
90% of 3.3 V.
shows the power-up sequence diagram. After POR_B is asserted, Core VDD and NVDDx can be
Power-Down Sequence
SRTC DryIce Power-Up/Down Sequence
This is to guarantee that POR is stable already at NVCC_CRM/QVDD
power domain interface before QVDD is turned on, and POR instantly
propagates to QVDD domain after QVDD is turned on.
i.MX25 Applications Processor for Automotive Products, Rev. 9
Figure 2. Power-Up Sequence Diagram
NOTE
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