IMX35 datasheet(15/148 Pages) FREESCALE

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i.MX35 Applications Processors for Industrial and Consumer Products, Rev. 6

Freescale Semiconductor

4.3

Supply Power-Up/Power-Down Requirements and Restrictions

This section provides power-up and power-down sequence guidelines for the i.MX35 processor.

CAUTION

Any i.MX35 board design must comply with the power-up and power-down

sequence guidelines as described in this section to guarantee reliable

operation of the device. Any deviation from these sequences can result in

irreversible damage to the i.MX35 processor (worst-case scenario).

NOTE

Deviation from these sequences can also result in one or both of the

following:

•

Excessive current during power-up phase

•

Prevent the device from booting

4.3.1

Powering Up

The power-up sequence should be completed as follows:

1. Assert Power on Reset (POR).

2. Turn on digital logic domain and IO power supply: VDDn, NVCCx

3. Wait until VDDn and NVCCx power supplies are stable + 32

μs.

4. Turn on all other power supplies: PHY1_VDDA, USBPHY1_VDDA_BIAS, PHY2_VDD,

USBPHY1_UPLLVDD, OSC24M_VDD, OSC_AUDIO_VDD, MVDD, PVDD, FUSEVDD.

(FUSEVDD is tied to GND if fuses are not being programmed.)

Static

VDD1,2,3,4 = 1.1 V (min.)

ARM is in wait for interrupt mode.

MAX is halted

L2 cache is kept powered.

L2 cache control logic off.

AWB enabled.

MCU PLL is off.

PER PLL is off.

All clocks are gated off.

OSC 24MHz is on

OSC audio is off

RNGC internal osc is off

820

µA

—

µA

—

µA

—

Note: Typical column: TA = 25

°C

Table 9. i.MX35 Power Modes (continued)

Power

Mode

Description

QVCC (ARM/L2

Peripheral)

MVDD/PVDD

OSC24M_VDD

OSC_AUDO_VDD

Typ.

Max.

Typ.

Max.

Typ.

Max.

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