MMA8652FC datasheet(12/65 Pages) NXP

12 / 65 page

MMA8652FC

Sensors

Freescale Semiconductor, Inc.

Modes of Operation

Figure 5. Operating modes for MMA8652FC

Some registers are reset when transitioning from STANDBY to ACTIVE. These registers are all noted in the device memory map

The SLEEP and WAKE modes are ACTIVE modes. For more information about how to use the SLEEP and WAKE modes and

how to transition between these modes, see Section 5.

Table 7. Operating modes

Mode

I2C Bus State

VDD

VDDIO

Description

OFF

Powered down

<1.8 V

VDDIO can be > VDD

• The device is powered off.

• All analog and digital blocks are shutdown.

•I2C bus inhibited.

STANDBY

I2C communication with

MMA8652FC is possible

VDDIO = High

VDD = High

ACTIVE bit is cleared

• Only digital blocks are enabled.

• Analog subsystem is disabled.

• Internal clocks disabled.

ACTIVE

(WAKE/SLEEP)

I2C communication with

MMA8652FC is possible

VDDIO = High

VDD = High

ACTIVE bit is set

All blocks are enabled (digital, analog).

SLEEP

WAKE

STANDBY

OFF

ACTIVE

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