MMA8451Q_12 데이터 시트보기 (PDF) - Freescale Semiconductor
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MMA8451Q_12 Datasheet PDF : 52 Pages
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4
Modes of Operation
SLEEP
ACTIVE
OFF
STANDBY
WAKE
Figure 6. MMA8451Q Mode Transition Diagram
Table 7. Mode of Operation Description
Mode
I2C Bus State
VDD
VDDIO
Function Description
OFF
Powered Down
<1.8V VDDIO Can be > VDD
The device is powered off. All analog and digital blocks
are shutdown. I2C bus inhibited.
STANDBY
I2C communication with
MMA8451Q is possible
VDDIO = High
ON VDD = High
ACTIVE bit is cleared
Only digital blocks are enabled.
Analog subsystem is disabled. Internal clocks disabled.
ACTIVE
I2C communication with
(WAKE/SLEEP) MMA8451Q is possible
VDDIO = High
ON VDD = High
ACTIVE bit is set
All blocks are enabled (digital, analog).
All register contents are preserved when transitioning from ACTIVE to STANDBY mode. Some registers are reset when
transitioning from STANDBY to ACTIVE. These are all noted in the device memory map register table. The SLEEP and WAKE
modes are ACTIVE modes. For more information on how to use the SLEEP and WAKE modes and how to transition between
these modes please refer to the functionality section of this document.
Sensors
Freescale Semiconductor, Inc.
MMA8451Q
11
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