Freescale Semiconductor FRDM-FXS-MULTI 데이터 시트
FXOS8700CQ
Sensors
Freescale Semiconductor, Inc.
Freescale Semiconductor, Inc.
77
10.14.5 MIN_X_MSB (0x4B), MIN_X_LSB (0x4C), MIN_Y_MSB (0x4D), MIN_Y_LSB (0x4E),
MIN_Z_MSB (0x4F), MIN_Z_LSB (0x50) registers
The magnetometer MIN_X/Y/Z registers are 16-bit, 2's complement format with a resolution of 0.1
μT/LSB. The registers are
read/write and along with the MAX_X/Y/Z registers are used to calculate the magnetic offset for each axis using the equation
(MAX_X/Y/Z + MIN_X/Y/Z) /2 when M_CTRL_REG2[maxmin_dis] = 0 (default).
(MAX_X/Y/Z + MIN_X/Y/Z) /2 when M_CTRL_REG2[maxmin_dis] = 0 (default).
When M_CTRL_REG1[m_acal] = 1 (default 0), the MAG_OFF_X/Y/Z registers are automatically updated with the calculated
offset values at the end of every measurement cycle (ODR period).
offset values at the end of every measurement cycle (ODR period).
On a POR, or after setting M_CTRL_REG2[maxmin_rst] = 1, the MIN_X/Y/Z registers are loaded with the hex value 0x7FFF
(positive full scale). The host application may write to the MIN_X/Y/Z registers to change the currently used minimum values for
each axis, however, when M_CTRL_REG1[maxmin_dis] = 0 (default), the system will overwrite these values when it updates the
MIN_X/Y/Z registers at the end of the next measurement cycle (ODR period).
(positive full scale). The host application may write to the MIN_X/Y/Z registers to change the currently used minimum values for
each axis, however, when M_CTRL_REG1[maxmin_dis] = 0 (default), the system will overwrite these values when it updates the
MIN_X/Y/Z registers at the end of the next measurement cycle (ODR period).
Table 169. MIN_X_MSB register
min_x[15:8]
0b0000_0000
Table 170. MIN_X_LSB register
min_x[7:0]
0b0000_0000
Table 171. MIN_Y_MSB register
min_y[15:8]
0b0000_0000
Table 172. MIN_Y_LSB register
min_y[7:0]
0b0000_0000
Table 173. MIN_Z_MSB register
min_z[15:8]
0b0000_0000
Table 174. MIN_Z_LSB register
min_z[7:0]
0b0000_0000