ADIS16300SLASHPCBZ datasheet(15/16 Pages) AD

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ADIS16300

Rev. 0 | Page 15 of 16

Table 22. ALM_MAG1, ALM_MAG2

Bit

Description

[15]

Comparison polarity

1 = greater than, 0 = less than

[14]

Not used

[13:0]

Data bits that match the format of the trigger source

selection

Table 23. ALM_SMPL1, ALM_SMPL2

Bit

Description

[15:8]

Not used

[7:0]

Data bits: number of samples (both 0x00 and 0x01 = 1)

Table 24. ALM_CTRL Bit Designations

Bits

Value

Description

[15:12]

Alarm 2 source selection

0000

Disable

0001

Power supply output

0010

Gyroscope output

0011

Not used

0100

Not used

0101

X-axis accelerometer output

0110

Y-axis accelerometer output

0111

Z-axis accelerometer output

1000

Gyroscopes temperature output

1001

X-axis inclinometer output

1010

Y- axis inclinometer output

1011

Auxiliary ADC input

[11:8]

Alarm 1 source selection (same as Alarm 2)

[7]

Rate of change (ROC) enable for Alarm 2

1 = rate of change, 0 = static level

[6]

Rate of change (ROC) enable for Alarm 1

1 = rate of change, 0 = static level

[5]

Not used

[4]

Comparison data filter setting1

1 = filtered data, 0 = unfiltered data

[3]

Not used

[2]

Alarm output enable

1 = enabled, 0 = disabled

[1]

Alarm output polarity

1 = active high, 0 = active low

[0]

Alarm output line select

1 = DIO2, 0 = DIO1

1 Incline outputs always use filtered data in this comparison.

Table 25. Alarm Configuration Example 1

DIN

Description

0xAF55

0xAE17

ALM_CTRL = 0x5517.

Alarm 1 input = XACCL_OUT.

Alarm 2 input = XACCL_OUT.

Static level comparison, filtered data.

DIO2 output indicator, positive polarity.

0xA783

0xA641

ALM_MAG1 = 0x8341.

Alarm 1 is true if XACCL_OUT > 0.5 g.

0xA93C

0xA8BF

ALM_MAG2= 0x3CBF.

Alarm 2 is true if XACCL_OUT < −0.5 g.

Table 26. Alarm Configuration Example 2

DIN

Description

0xAF76

0xAE87

ALM_CTRL = 0x7687.

Alarm 1 input = ZACCL_OUT.

Alarm 2 input = YACCL_OUT.

Rate of change comparison, unfiltered data.

DIO2 output indicator, positive polarity.

0xB601

SMPL_PRD = 0x0001.

Sample rate = 819.2 SPS.

0xAB08

ALM_SMPL1 = 0x0008.

Alarm 1 rate of change period = 9.77 ms.

0xAC50

ALM_SMPL2= 0x0050.

Alarm 2 rate of change period = 97.7 ms.

0xA783

0xA641

ALM_MAG1 = 0x8341.

Alarm 1 is true if XACCL_OUT > 0.5 g.

0xA93C

0xA8BE

ALM_MAG2= 0x3CBE.

Alarm 2 is true if XACCL_OUT < −0.5 g.

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