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ADIS16489 Datasheet(PDF) 17 Page - Analog Devices |
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ADIS16489 Datasheet(HTML) 17 Page - Analog Devices |
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17 / 40 page  Data Sheet ADIS16489 Rev. B | Page 17 of 40 Table 18. DIAG_STS Bit Definitions Bits Description [15:12] Not used 11 Self test failure, barometer (1 = failure) [10:6] Not used 5 ODST failure, z-axis accelerometer (1 = failure) 4 ODST failure, y-axis accelerometer (1 = failure) 3 ODST failure, x-axis accelerometer (1 = failure) 2 ODST failure, z-axis gyroscope (1 = failure) 1 ODST failure, y-axis gyroscope (1 = failure) 0 Self test failure, x-axis gyroscope (1 = failure) SYS_E_FLAG[5] (see Table 16) contains the pass and fail result (0 = pass) for on demand self test (ODST) operations, whereas the DIAG_STS register (see Table 17 and Table 18) contains pass and fail flags (0 = pass) for each inertial sensor. Reading the DIAG_STS register causes all of its bits to restore to 0. The bits in DIAG_STS return to 1 if the error conditions persists. ALARM ERROR FLAGS (ALM_STS) Table 19. ALM_STS Register Definition Page Addresses Default Access Flash Backup 0x00 0x0C, 0x0D 0x0000 R No Table 20. ALM_STS Bit Definitions Bits Description [15:12] Not used 11 Barometer alarm flag (1 = alarm is active) [10:6] Not used 5 Z-axis accelerometer alarm flag (1 = alarm is active) 4 Y-axis accelerometer alarm flag (1 = alarm is active) 3 X-axis accelerometer alarm flag (1 = alarm is active) 2 Z-axis gyroscope alarm flag (1 = alarm is active) 1 Y-axis gyroscope alarm flag (1 = alarm is active) 0 X-axis gyroscope alarm flag (1 = alarm is active) The ALM_STS register (see Table 19 and Table 20) contains the error flags for the alarm settings in the ALM_CNFG_0 (see Table 170) and ALM_CNFG_1 (see Table 172) registers. Reading the ALM_STS register causes all bits to restore to 0. If the alarm condition is persistent, its bit restores to a 1 in the next sample cycle. INTERNAL TEMPERATURE (TEMP_OUT) Table 21. TEMP_OUT Register Definition Page Addresses Default Access Flash Backup 0x00 0x0E, 0x0F Not applicable R No Table 22. TEMP_OUT Bit Definitions Bits Description [15:0] Temperature data; twos complement, 0.00565°C per LSB, 25°C = 0x0000 The TEMP_OUT register (see Table 21 and Table 22) provides a coarse measurement of the temperature inside of the ADIS16489. This data is most useful for monitoring relative changes that influence the temperature inside of the ADIS16489. Table 23. TEMP_OUT Data Format Examples Temperature (°C) Decimal Hex Binary +85 +10,619 0x297B 0010 1001 0111 1011 +25 + 0.0113 +2 0x0002 0000 0000 0000 0010 +25 + 0.00565 +1 0x0001 0000 0000 0000 0001 +25 0 0x0000 0000 0000 0000 0000 +25 − 0.00565 −1 0xFFFF 1111 1111 1111 1111 +25 − 0.0113 −2 0xFFFE 1111 1111 1111 1110 −40 −11,504 0xD310 1101 0011 0001 0000 GYROSCOPE DATA The gyroscopes in the ADIS16489 measure the angular rate of rotation around three orthogonal axes (x, y, and z). Figure 18 illustrates the orientation of each gyroscope axis, along with the direction of rotation that produces a positive response in each of their measurements. PIN 1 PIN 23 ωY Y-AXIS ωX X-AXIS Z-AXIS ωZ Figure 18. Gyroscope Axis and Polarity Assignments Each gyroscope has two output data registers. Figure 19 illustrates how these two registers combine to support a 32-bit, twos complement data format for the x-axis gyroscope measure- ments. This format also applies to the y- and z-axes as well. X-AXIS GYROSCOPE DATA 0 15 15 0 X_GYRO_OUT X_GYRO_LOW Figure 19. Gyroscope Output Data Structure X-Axis Gyroscope (X_GYRO_LOW, X_GYRO_OUT) Table 24. X_GYRO_LOW Register Definition Page Addresses Default Access Flash Backup 0x00 0x10, 0x11 Not applicable R No Table 25. X_GYRO_LOW Bit Definitions Bits Description [15:0] X-axis gyroscope data; low word Table 26. X_GYRO_OUT Register Definition Page Addresses Default Access Flash Backup 0x00 0x12, 0x13 Not applicable R No |
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