Specifications

Data sheet
BMA220
Page 28
BST-BMA220-DS003-08 | Revision 1.15 | August 2011 Bosch Sensortec
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Note: Specifications within this document are subject to change without notice.
Table 12: Control and status register for low-g detection
Name
Register
Address
(SPI) *
Description Number of bits Reset-value
Low_th 0x06[7:4]
define the low-g threshold level
1 LSB is 2*(LSB of acc_data)
LOW_TH_NUM
4
LOW_TH_INIT
“0100”
Low_hy 0x07[7:6]
define the low-g hysteresis level
1 LSB is 2*(LSB of acc_data)
LOW_HY_NUM
2
LOW_HY_INI
T
“01”
low_dur 0x07[5:0]
define the number of measured
data which has to be lower than
low_th+low_hy to set the
interrupt (max. 64)
LOW_DUR_NUM
6
LOW_DUR_IN
IT
“111111” (3F)
en_low 0x0E.3
enable signal for low-g
detection
1 ‘0’
low_int 0x0C.3
whether low-g interrupt has
been triggered (0=no, 1=yes)
1 ‘0’
* For determining the corresponding I
2
C register address, please refer to figure 2 in chapter 4 (memory map)