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ADIS16489 Datasheet(PDF) 32 Page - Analog Devices |
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ADIS16489 Datasheet(HTML) 32 Page - Analog Devices |
32 / 40 page ![]() ADIS16489 Data Sheet Rev. B | Page 32 of 40 Solving for ΔX_ACCL_OUT, ΔZ_GYRO_OUT, ΔY_GYRO_OUT, and ΔX_GYRO_OUT Use Equation 1 to Equation 4 to solve for ΔX_ACCL_OUT, ΔZ_GYRO_OUT, ΔY_GYRO_OUT, and ΔX_GYRO_OUT, which the following bits provide user control for in the ALM_CFG_0 register (see Table 170) in Bits[13:12], Bits[9:8], Bits[5:4], and Bits[1:0]. ( ) ( ) − − = ∑ ∑ = = 7 0 7 0 112 8 1 n A n A n X n X T ΔX_ACCL_OU (1) where XA = X_ACCL_OUT. ( ) ( ) − − = ∑ ∑ = = 7 0 7 0 112 8 1 n G n G n Z n Z T ΔZ_GYRO_OU (2) where ZG = Z_GYRO_OUT. ( ) ( ) − − = ∑ ∑ = = 7 0 7 0 112 8 1 n G n G n Y n Y T ΔY_GYRO_OU (3) where YG = Y_GYRO_OUT. ( ) ( ) − − = ∑ ∑ = = 7 0 7 0 112 8 1 n G n G n X n X T ΔX_GYRO_OU (4) where XG = X_GYRO_OUT. Table 170. ALM_CNFG_0 Bit Definitions Bits Description 15 X-axis accelerometer; 0: alarm is off, 1: alarm is on 14 Not used [13:12] X-axis accelerometer polarity and mode settings; select one of the four options for the condition that triggers the alarm (ALM_STS[3] = 1, see Table 20) 00: X_ACCL_OUT < XA_ALM_MAGN 01: ΔX_ACCL_OUT < XA_ALM_MAGN (see Equation 1) 10: X_ACCL_OUT > XA_ALM_MAGN 11: ΔX_ACCL_OUT > XA_ALM_MAGN (see Equation 1) 11 Z-axis gyroscope; 0: alarm is off, 1: alarm is on 10 Not used [9:8] Z-axis gyroscope polarity and mode settings; select one of the four options for the condition that triggers the alarm (ALM_STS[2] = 1, see Table 20) 00: Z_GYRO_OUT < ZG_ALM_MAGN 01: ΔZ_GYRO_OUT < ZG_ALM_MAGN (see Equation 2) 10: Z_GYRO_OUT > ZG_ALM_MAGN 11: ΔZ_GYRO_OUT > ZG_ALM_MAGN (see Equation 2) 7 Y-axis gyroscope; 0: alarm is off, 1: alarm is on 6 Not used [5:4] Y-axis gyroscope polarity and mode settings. Select one of the four options for the condition that triggers the alarm (ALM_STS[1] = 1, see Table 20) 00: Y_GYRO_OUT < YG_ALM_MAGN 01: ΔY_GYRO_OUT < YG_ALM_MAGN (see Equation 3) 10: Y_GYRO_OUT > YG_ALM_MAGN 11: ΔY_GYRO_OUT > YG_ALM_MAGN (see Equation 3) 3 X-axis gyroscope; 0: alarm is off, 1: alarm is on Bits Description 2 Not used 1:0 X-axis gyroscope polarity and mode settings; select one of the four options for the condition that triggers the alarm flag (ALM_STS[0] = 1, see Table 20) 00: X_GYRO_OUT < XG_ALM_MAGN 01: ΔX_GYRO_OUT < XG_ALM_MAGN (see Equation 4) 10: X_GYRO_OUT > XG_ALM_MAGN 11: ΔX_GYRO_OUT > XG_ALM_MAGN (see Equation 4) Table 171. ALM_CNFG_1 Register Definitions Page Addresses Default Access Flash Backup 0x03 0x22, 0x23 0x0000 R/W Yes Solving for ΔZ_ACCL_OUT and ΔY_ACCL_OUT Use Equation 5 and Equation 6 to solve for ΔZ_ACCL_OUT and ΔY_ACCL_OUT in Bits[5:4] and Bits[1:0] in Table 172. ( ) ( ) − − = ∑ ∑ = = 7 0 7 0 112 8 1 n A n A n Z n Z T ΔZ_ACCL_OU (5) where ZA = Z_ACCL_OUT. ( ) ( ) − − = ∑ ∑ = = 7 0 7 0 112 8 1 n A n A n Y n Y T ΔY_ACCL_OU (6) where YA = Y_ACCL_OUT. Table 172. ALM_CNFG_1 Bit Definitions Bits Description [15:8] Not used 7 Z-axis accelerometer; 0: alarm is off, 1: alarm is on 6 Not used [5:4] Z-axis accelerometer polarity and mode settings; select one of the four options for the condition that triggers the alarm (ALM_STS[5] = 1, see Table 20) 00: Z_ACCL_OUT < ZA_ALM_MAGN 01: ΔZ_ACCL_OUT < ZA_ALM_MAGN (see Equation 5) 10: Z_ACCL_OUT > ZA_ALM_MAGN 11: ΔZ_ACCL_OUT > ZA_ALM_MAGN (see Equation 5) 4 Z-axis accelerometer mode, 0: static, 1: dynamic 3 Y-axis accelerometer; 0: alarm is off, 1: alarm is on 2 Not used [1:0] Y-axis accelerometer polarity and mode settings; select one of the four options for the condition that triggers the alarm (ALM_STS[4] = 1, see Table 20) 00: Y_ACCL_OUT < YA_ALM_MAGN 01: ΔY_ACCL_OUT < YA_ALM_MAGN (see Equation 6) 10: Y_ACCL_OUT > YA_ALM_MAGN 11: ΔY_ACCL_OUT > YA_ALM_MAGN (see Equation 6) Table 173. ALM_CNFG_2 Register Definitions Page Addresses Default Access Flash Backup 0x03 0x24, 0x25 0x0000 R/W Yes |
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