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ADIS16489 Datasheet(PDF) 22 Page - Analog Devices

Part # ADIS16489
Description  Seven Degrees of Freedom Inertial Sensor
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADIS16489 Datasheet(HTML) 22 Page - Analog Devices

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ADIS16489
Data Sheet
Rev. B | Page 22 of 40
X-Axis Delta Velocity (X_DELTVEL_LOW, X_DELTVEL_OUT)
Table 72. X_DELTVEL_LOW Register Definitions
Page
Addresses
Default
Access
Flash Backup
0x00
0x4C, 0x4D
Not applicable
R
No
Table 73. X_DELTVEL_LOW Bit Definitions
Bits
Description
[15:0]
X-axis delta angle data; low word
Table 74. X_DELTVEL_OUT Register Definitions
Page
Addresses
Default
Access
Flash Backup
0x00
0x4E, 0x4F
Not applicable
R
No
Table 75. X_DELTVEL_OUT Bit Definitions
Bits
Description
[15:0]
X-axis delta velocity data; twos complement,
±200 m/sec range, 0 m/sec = 0x0000; 1 LSB = 200 m/sec
÷ 215 = ~6.104 mm/sec
The X_DELTVEL_LOW (see Table 72 and Table 73) and
X_DELTVEL_OUT (see Table 74 and Table 75) registers
contain the delta velocity data for the x-axis.
Y-Axis Delta Velocity (Y_DELTVEL_LOW, Y_DELTVEL_OUT)
Table 76. Y_DELTVEL_LOW Register Definitions
Page
Addresses
Default
Access
Flash Backup
0x00
0x50, 0x51
Not applicable
R
No
Table 77. Y_DELTVEL_LOW Bit Definitions
Bits
Description
[15:0]
Y-axis delta velocity data; low word
Table 78. Y_DELTVEL_OUT Register Definitions
Page
Addresses
Default
Access
Flash Backup
0x00
0x52, 0x53
Not applicable
R
No
Table 79. Y_DELTVEL_OUT Bit Definitions
Bits
Description
[15:0]
Y-axis delta velocity data; twos complement, ±50 m/sec
range, 0 m/sec = 0x0000; 1 LSB = 50 m/sec ÷ 215 =
~1.526 mm/sec
The Y_DELTVEL_LOW (see Table 76 and Table 77) and
Y_DELTVEL_OUT (see Table 78 and Table 79) registers
contain the delta velocity data for the y-axis.
Z-Axis Delta Velocity (Z_DELTVEL_LOW, Z_DELTVEL_OUT)
Table 80. Z_DELTVEL_LOW Register Definitions
Page
Addresses
Default
Access
Flash Backup
0x00
0x54, 0x55
Not applicable
R
No
Table 81. Z_DELTVEL_LOW Bit Definitions
Bits
Description
[15:0]
Z-axis delta angle data; low word
Table 82. Z_DELTANG_OUT Register Definitions
Page
Addresses
Default
Access
Flash Backup
0x00
0x56, 0x57
Not applicable
R
No
Table 83. Z_DELTVEL_OUT Bit Definitions
Bits
Description
[15:0]
Z-axis delta velocity data; twos complement, ±200 m/sec
range, 0 m/sec = 0x0000; 1 LSB = 200 m/sec ÷ 215 = ~6.104
mm/sec
The Z_DELTVEL_LOW (see Table 80 and Table 81) and
Z_DELTVEL_OUT (see Table 82 and Table 83) registers
contain the delta velocity data for the z-axis.
Delta Velocity Resolution
Table 84 and Table 85 offer various numerical examples that
demonstrate the format of the delta velocity data in both 16-bit
and 32-bit formats.
Table 84. 16-Bit Delta Velocity Data Format Examples
Velocity (m/sec)
Decimal
Hex
Binary
+200 × (215 − 1)/215
+32,767
0x7FFF
0111 1111 1110 1111
+200/214
+2
0x0002
0000 0000 0000 0010
+200/215
+1
0x0001
0000 0000 0000 0001
0
0
0x0000
0000 0000 0000 0000
−200/215
−1
0xFFFF
1111 1111 1111 1111
−200/214
−2
0xFFFE
1111 1111 1111 1110
−200
−32,768
0x8000
1000 0000 0000 0000
Table 85. 32-Bit Delta Velocity Data Format Examples
Velocity (m/sec)
Decimal
Hex
+200 × (231 − 1)/231
+2,147,483,647
0x7FFFFFFF
+200/230
+2
0x00000002
+200/231
+1
0x00000001
0
0
0x00000000
−200/231
−1
0xFFFFFFFF
−200/230
−2
0xFFFFFFFE
−200
−2,147,483,648
0x80000000
REAL-TIME CLOCK
The VDDRTC power supply pin (see Table 6, Pin 23) provides
a separate supply for the real-time clock (RTC) function. Connect-
ing the VDDTC pin to its own 3.3 V supply enables the RTC to
keep track of time, even when the main supply (VDD) is off.
Configure the RTC function by selecting one of two modes in
CONFIG[0] (see Table 157). The real-time clock data is available
in the TIME_MS_OUT register (see Table 87), TIME_DH_OUT
register (see Table 89), and TIME_YM_OUT register (see
Table 91). When using the elapsed timer mode, the time data
registers start at 0x0000 when the device starts up (or resets)
and begin keeping time in a manner that is similar to a stopwatch.
When using the clock/calendar mode, write the current time to the
real-time registers in the following sequence: seconds (TIME_
MS_OUT[5:0]), minutes (TIME_ MS_OUT[13:8]), hours
(TIME_DH_OUT[5:0]), day (TIME_DH_OUT[12:8]), month
(TIME_YM_OUT[3:0]), and year (TIME_YM_OUT[14:8]).


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