ADIS16210PCBZ datasheet(16/20 Pages) AD

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ADIS16210

Rev. A | Page 16 of 20

ALARMS

There are four independent alarms, which provide trigger level

and polarity controls. The ALM_CTRL register (Table 38) provides

individual settings for data source selection (Bits[7:4]), static and

dynamic comparison (Bits[14:12]), trigger direction/polarity

(Bits[11:8]), and alarm enable (Bits[3:0]).

Table 38. ALM_CTRL (Base Address = 0x2E), Read/Write

Bits

Description (Default = 0x0000)

[15]

Not used

[14]

Alarm Z, dynamic control

1 = dynamic, 0 = static

[13]

Alarm Y, dynamic control

1 = dynamic, 0 = static

[12]

Alarm X, dynamic control

1 = dynamic, 0 = static

[11]

Alarm S, comparison polarity

1 = SUPPLY_OUT/TEMP_OUT > ALM_MAG_S

0 = SUPPLY_OUT/TEMP_OUT < ALM_MAG_S

[10]

Alarm Z, comparison polarity

1 = ZACCL_OUT/ZINCL_OUT > ALM_MAG_Z

0 = ZACCL_OUT/ZINCL_OUT < ALM_MAG_Z

[9]

Alarm Y, comparison polarity

1 = YACCL_OUT/YINCL_OUT > ALM_MAG_Y

0 = YACCL_OUT/YINCL_OUT < ALM_MAG_Y

[8]

Alarm X, comparison polarity

1 = XACCL_OUT/XINCL_OUT > ALM_MAG_X

0 = XACCL_OUT/XINCL_OUT < ALM_MAG_X

[7]

Alarm S, source selection

1 = SUPPLY_OUT, 0 = TEMP_OUT

[6]

Alarm Z, source selection

1 = ZINCL_OUT, 0 = ZACCL_OUT

[5]

Alarm Y, source selection

1 = YINCL_OUT, 0 = YACCL_OUT

[4]

Alarm X, source selection

1 = XINCL_OUT, 0 = XACCL_OUT

[3]

Alarm S, enable

1 = enabled, 0 = disabled

[2]

Alarm Z, enable

1 = enabled, 0 = disabled

[1]

Alarm Y, enable

1 = enabled, 0 = disabled

[0]

Alarm X, enable

1 = enabled, 0 = disabled

SYSTEM ALARM

The system alarm monitors either power supply or internal tem-

perature, according to the user selections in ALM_CTRL[11],

ALM_CTRL[7], ALM_CTRL[3], and the ALM_MAG_S register in

Table 42. For example, set ALM_CTRL = 0x0008 (DIN = 0xA900,

0xA808) and ALM_MAG_S = 0x533 (DIN = 0xA705, 0xA633)

to disable all three inertial alarms and configure the system alarm

active when TEMP_OUT < 0°C.

STATIC ALARMS

The static alarm setting enables the ADIS16210 to compare the

data source (ALM_CTRL[6:4]) with the corresponding values

in the ALM_MAG_x registers (Table 39, Table 40, and Table 41)

using the trigger direction/polarity settings in ALM_CTRL[10:8].

For example, if ALM_CTRL[10] = 0, ALM_CTRL[6] = 1, and

ALM_MAG_Z = 0x2000, then Alarm Z becomes active when

ZINCL_OUT is less than 0x2000, or 45°.

DYNAMIC ALARMS

The dynamic alarm setting monitors the data selection for a

rate-of-change comparison. The rate-of-change comparison is

represented by the magnitude in the ALM_MAG_x registers

(Table 39, Table 40, and Table 41), divided by the time in the

ALM_SMPL_x registers (Table 43, Table 44, Table 45).

For example, if ALM_CTRL[9] = 1, ALM_CTRL[5] = 0,

ALM_MAG_Y = 0x4000, and ALM_SMPL_Y = 0x0064, then

Alarm Y (DIAG_STAT[9]) becomes active when YACCL_OUT

changes by more than +1 g over 100 samples. The AVG_CNT

Table 39. ALM_MAG_X (Base Address = 0x20), Read/Write

Bits

Description (Default = 0x0000)

[15:0]

Same data format as ZACCL_OUT or ZINCL_OUT,

according to the setting in ALM_CTRL[4]

Table 40. ALM_MAG_Y (Base Address = 0x22), Read/Write

Bits

Description (Default = 0x0000)

[15:0]

Same data format as ZACCL_OUT or ZINCL_OUT,

according to the setting in ALM_CTRL[5]

Table 41. ALM_MAG_Z (Base Address = 0x24), Read/Write

Bits

Description (Default = 0x0000)

[15:0]

Same data format as ZACCL_OUT or ZINCL_OUT,

according to the setting in ALM_CTRL[6]

Table 42. ALM_MAG_S (Base Address =0x26), Read/Write

Bits

Description (Default = 0x0000)

[15:0]

Same data format as SUPPLY_OUT or TEMP_OUT,

according to the setting in ALM_CTRL[7]

Table 43. ALM_SMPL_X (Base Address = 0x28), Read/Write

Bits

Description (Default = 0x0001)

[15:8]

Not used

[7:0]

Binary, number of samples

Table 44. ALM_SMPL_Y (Base Address = 0x2A), Read/Write

Bits

Description (Default = 0x0001)

[15:8]

Not used

[7:0]

Binary, number of samples

Table 45. ALM_SMPL_Z (Base Address = 0x2C), Read/Write

Bits

Description (Default = 0x0001)

[15:8]

Not used

[7:0]

Binary, number of samples

ALARM REPORTING

See DIAG_STAT[11:8] (Table 36) for alarm flags, which equal 1

when an alarm condition is detected. DIO_CTRL (Table 30)

offers settings that configure DIO1 or DIO2 as an alarm

indicator signal.

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