Freescale Semiconductor FRDM-FXS-MULTI 데이터 시트

Sensors
Freescale Semiconductor, Inc.

39

 

Device identification register. This register contains the device identifier which is set to 0xC4 for preproduction devices and 0xC7 
for production devices.

Except for Standby mode selection, the device must be in Standby mode to change any of 
the fields within CTRL_REG1 (0x2A).

It is important to note that when the device is in Auto-Sleep mode, the system ODR and data rate for all the system functional 
blocks is overridden by the sleep data rate set by the aslp_rate field.When hybrid mode is enabled, the frequency is one-half of 
what is shown in 

. For example, with aslp_rate = 0b00 the frequency is 25 Hz.

 shows the various system output data rates (ODR) that may be selected using the dr[2:0] bits.The selected ODR is 

reduced by a factor of two when the device is operated in hybrid mode. 

who_am_i[7:0]

0xC7

aslp_rate[1:0]

dr[2:0]

lnoise

f_read

active

0b00

0b001

0

0

0

aslp_rate[1:0]

Configures the auto-wake sample frequency when the device is in Sleep mode.
See 

 for more information.

dr[2:0]

Output Data Rate (ODR) selection.
See 

 for more information.

lnoise

Reduced noise and full-scale range mode (analog gain times 2).
0: Normal mode
1: Reduced noise mode; Note that the FSR setting is restricted to a ±4 g in this mode (lnoise = 1).

f_read

Fast-read mode: Data format is limited to the 8-bit MSB for accelerometer output data. The auto-address pointer will skip over 
the LSB addresses for each axes sample data when performing a burst read operation.
0: Normal mode 
1: Fast-read mode

active

Standby/Active. 
0: Standby mode
1: Active mode 

0

 

0

50

0

1

12.5

1

 

0

6.25

1

1

1.56