MCIMX35_101 Datasheet, PDF (16/148 Pages) Freescale Semiconductor, Inc – i.MX35 Applications Processors for Industrial and Consumer Products

4. Turn on all other power supplies: PHY1_VDDA, USBPHY1_VDDA_BIAS, PHY2_VDD,
USBPHY1_UPLLVDD, OSC24M_VDD, OSC_AUDIO_VDD, MVDD, PVDD, FUSEVDD.
(Always FUSE_VDD should be connected to ground, except when eFuses are to be
programmed.)
5. Wait until PHY1_VDDA, USBPHY1_VDDA_BIAS, PHY2_VDD, USBPHY1_UPLLVDD,
OSC24M_VDD, OSC_AUDIO_VDD, MVDD, PVDD, (FUSEVDD, optional). Power supplies
are stable + 100 μs.
6. Deassert the POR signal.
Figure 2 shows the power-up sequence and timing.
Figure 2. i.MX35 Power-Up Sequence and Timing
4.3.2 Powering Down
The power-up sequence in reverse order is recommended for powering down. However, all power supplies
can be shut down at the same time.
4.4 Reset Timing
There are two ways of resetting the i.MX35 using external pins:
• Power On Reset (using the POR_B pin)
i.MX35 Applications Processors for Industrial and Consumer Products, Rev. 8
16
Freescale Semiconductor