Freescale Semiconductor FRDM-FXS-MULTI 데이터 시트

다운로드
페이지 48
4 Modes of Operation
The device may be placed into one of three functional modes:
• Standby: Some digital blocks are enabled; I
2
C/SPI communication with
FXAS21000 is possible.
• Active: All blocks are enabled (digital and analog), the device is actively
measuring the angular rate at the ODR specified in 
• Ready: The drive circuits are running, but no measurements are being made.
. After a power-on-reset
(POR) or triggered reset event (software or hardware pin), the device performs a boot
sequence and loads the registers with their preset values, which are stored within the
non-volatile memory (NVM).
 
Active = 1
Power up
Active = 1
 
 
 
 
 
Functional modes
Start-up sequence
Boot_end = 1
Ready
Standby
Active
 
Boot
Active = 0
and
Ready = 0
Active = 0
and
Ready = 1
Active = 0
and
Ready = 0
Active = 0
and
Ready = 1
Figure 13. Functional mode diagram
5 Functionality
The FXAS21000 is a low-power, digital-output, 3-axis gyroscope with both I
2
C and
SPI interfaces. The functionality includes the following:
• 14-bit output data is left justified in 2's complement format (big endian format)
• Configurable full scale ranges of ±200, ±400, ±800 and ±1600 dps
• Configurable output data rates from 1.5625 to 200 Hz
Modes of Operation
20
Xtrinsic 3-Axis Digital Angular Rate Gyroscope, Rev1.2, 7/2014.
Freescale Semiconductor, Inc.