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ADIS16489 Datasheet(PDF) 19 Page - Analog Devices |
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ADIS16489 Datasheet(HTML) 19 Page - Analog Devices |
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19 / 40 page  Data Sheet ADIS16489 Rev. B | Page 19 of 40 X-Axis Accelerometer (X_ACCL_LOW, X_ACCL_OUT) Table 38. X_ACCL_LOW Register Definition Page Addresses Default Access Flash Backup 0x00 0x1C, 0x1D Not applicable R No Table 39. X_ACCL_LOW Bit Definitions Bits Description [15:0] X-axis accelerometer data; low word Table 40. X_ACCL_OUT Register Definition Page Addresses Default Access Flash Backup 0x00 0x1E, 0x1F Not applicable R No Table 41. X_ACCL_OUT Definitions Bits Description [15:0] X-axis accelerometer data, high word; twos complement, ±18 g range; 0 g = 0x0000, 1 LSB = 0.8 mg The X_ACCL_LOW (see Table 38 and Table 39) and X_ACCL_ OUT (see Table 40 and Table 41) registers contain the accelerometer data for the x-axis. Y-Axis Accelerometer (Y_ACCL_LOW, Y_ACCL_OUT) Table 42. Y_ACCL_LOW Register Definition Page Addresses Default Access Flash Backup 0x00 0x20, 0x21 Not applicable R No Table 43. Y_ACCL_LOW Bit Definitions Bits Description [15:0] Y-axis accelerometer data; low word Table 44. Y_ACCL_OUT Register Definition Page Addresses Default Access Flash Backup 0x00 0x22, 0x23 Not applicable R No Table 45. Y_ACCL_OUT Bit Definitions Bits Description [15:0] Y-axis accelerometer data; twos complement, ±18 g range, 0 g = 0x0000, 1 LSB = 0.8 mg The Y_ACCL_LOW (see Table 42 and Table 43) and Y_ACCL_ OUT (see Table 44 and Table 45) registers contain the accelerometer data for the x-axis. Z-Axis Accelerometer (Z_ACCL_LOW, Z_ACCL_OUT) Table 46. Z_ACCL_LOW Register Definition Page Addresses Default Access Flash Backup 0x00 0x24, 0x25 Not applicable R No Table 47. Z_ACCL_LOW Bit Definitions Bits Description [15:0] Z-axis accelerometer data; low word Table 48. Z_ACCL_OUT Register Definition Page Addresses Default Access Flash Backup 0x00 0x26, 0x27 Not applicable R No Table 49. Z_ACCL_OUT Bit Definitions Bits Description [15:0] Z-axis accelerometer data, high word; twos complement, ±18 g range; 0 g = 0x0000, 1 LSB = 0.8 mg The Z_ACCL_LOW (see Table 46 and Table 47) and Z_ACCL_ OUT (see Table 48 and Table 49) registers contain the accelerome- ter data for the z-axis. Accelerometer Resolution Table 50 and Table 51 offer various numerical examples that demonstrate the format of the linear acceleration data in both 16-bit and 32-bit formats. Table 50. 16-Bit Accelerometer Data Format Examples Acceleration Decimal Hex Binary +18 g +20,000 0x4E20 0100 1110 0010 0000 +1.6 mg +2 0x0002 0000 0000 0000 0010 +0.8 mg +1 0x0001 0000 0000 0000 0001 0 mg 0 0x0000 0000 0000 0000 0000 −0.8 mg −1 0xFFFF 1111 1111 1111 1111 −1.6 mg −2 0xFFFE 1111 1111 1111 1110 −18 g −20,000 0xB1E0 1011 0001 1110 0000 Table 51. 32-Bit Accelerometer Data Format Examples Acceleration (g) Decimal Hex +18 +1,310,720,000 0x4E200000 +0.0008/215 +2 0x00000002 +0.0008/216 +1 0x00000001 0 0 0x00000000 −0.0008/216 −1 0xFFFFFFFF −0.0008/215 −2 0xFFFFFFFE −18 −1,310,720,000 0xB1E00000 BAROMETER DATA The barometer measures the atmospheric pressure. The barometer has two output data registers: BAROM_LOW and BAROM_OUT. Figure 22 illustrates how these two registers combine to support 32-bit, twos complement data format for the pressure measurements. BAROMETER DATA 0 15 15 0 BAROM_OUT BAROM_LOW Figure 22. Barometer Output Data Structure Barometer (BAROM_LOW, BAROM_OUT) Table 52. BAROM_LOW Register Definition Page Addresses Default Access Flash Backup 0x00 0x2E, 0x2F Not applicable R No Table 53. BAROM_LOW Bit Definitions Bits Description [15:0] Barometer data; low word |
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