AMC7812SPAPR datasheet(68/92 Pages) TI

68 / 92 page

AMC7812

SBAS513E – JANUARY 2011 – REVISED SEPTEMBER 2013

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ALARM CONTROL REGISTER (Read/Write, Address = 4Eh, Default = 0000h)

The Alarm Control Register determines whether the ALARM pin is accessed when a corresponding alarm event

occurs. However, this register does not affect the status bit in the Status Register. Note that the thermal alarm is

always enabled. When the THERM_ALR bit = '1', the ALARM pin goes low, if the pin is enabled.

Table 21. Alarm Control Register

BIT

NAME

DEFAULT

R/W

DESCRIPTION

—

Reserved. Writing to this bit causes no change. Reading this bit returns '0'.

CH0 and (CH0+/CH1–) alarm enable bit.

If EALR-CH0 = '1', the alarm is enabled, the CH0-ALR bit is set, and the ALARM pin goes

EALR-CH0

R/W

low (if enabled) when the input of CH0 or (CH0+/CH1–) is out of range.

If EALR-CH0 = '0', the alarm is masked. When the input of CH0 or (CH0+/CH1–) is out of

range, the ALARM pin does not go low, but the CH0-ALR bit is set.

CH1 alarm enable bit.

If EALR-CH1 = '1', the alarm is enabled, the CH1-ALR bit is set, and the ALARM pin goes

EALR-CH1

R/W

low (if enabled) when the input of CH1 is out of range.

If EALR-CH1 = '0', the alarm is masked. When the input of CH1 is out of range, the

ALARM pin does not go low, but the CH1-ALR bit is set.

CH2 and (CH2+/CH3–) alarm enable bit.

If EALR-CH2 = '1', the alarm is enabled, the CH2-ALR bit is set, and the ALARM pin goes

EALR-CH2

R/W

low (if enabled) when the input of CH2 or (CH2+/CH3–) is out of range.

If EALR-CH2 = '0', the alarm is masked. When the input of CH2 or (CH2+/CH3–) is out of

range, the ALARM pin does not go low, but the CH2-ALR bit is set.

CH3 alarm enable bit.

If EALR-CH3 = '1', the alarm is enabled, the CH3-ALR bit is set, and the ALARM pin goes

EALR-CH3

R/W

low (if enabled) when the input of CH3 is out of range.

If EALR-CH3 = '0', the alarm is masked. When the input of CH3 is out of range, the

ALARM pin does not go low, but the CH3-ALR bit is set.

Local sensor low alarm enable bit.

If EALR-LT-Low = '1', the LT-Low alarm is enabled. When LT is below the specified range,

EALR-LT-Low

R/W

the LT-Low-ALR bit is set ('1') and the ALARM pin goes low (if enabled).

If EALR-LT-Low = '0', the LT-Low alarm is masked. When LT is below the specified range,

the ALARM pin does not go low, but the LT-Low-ALR bit is set.

Local sensor high alarm enable bit.

If EALR-LT-High = '1', the LT-High alarm is enabled. When LT is above the specified

EALR-LT-High

R/W

range, the LT-High-ALR bit is set ('1') and the ALARM pin goes low (if enabled).

If EALR-LT-High = '0', the LT-High alarm is masked. When LT is above the specified

range, the ALARM pin does not go low, but the LT-High-ALR bit is set.

D1 low alarm enable bit.

If EALR-D1-Low = '1', the D1-Low alarm is enabled. When D1 is below the specified range,

EALR-D1-Low

R/W

the D1-Low-ALR bit is set ('1'), and the ALARM pin goes low (if enabled).

If EALR-D1-Low = '0', the D1-Low alarm is masked. When D1 is below the specified range,

the ALARM pin does not go low, but the D1-Low-ALR bit is set.

D1 high alarm enable bit.

If EALR-D1-High = '1', the D1-High alarm is enabled. When D1 is above the specified

EALR-D1-High

R/W

range, the D1-High-ALR bit is set ('1'), and the ALARM pin goes low (if enabled).

If EALR-D1-High = '0', the D1-High alarm is masked. When D1 is above the specified

range, the ALARM pin does not go low, but the D1-High-ALR bit is set.

D2 low alarm enable bit.

If EALR-D2-Low = '1', the D2-Low alarm is enabled. When D2 is below the specified range,

EALR-D2-Low

R/W

the D2-Low-ALR bit is set ('1'), and the ALARM pin goes low (if enabled).

If EALR-D2-Low = '0', the D2-Low alarm is masked. When D2 is below the specified range,

the ALARM pin does not go low, but the D2-Low-ALR bit is set.

D2 high alarm enable bit.

If EALR-D2-High = '1', the D2-High alarm is enabled. When D2 is above the specified

EALR-D2-High

R/W

range, the D2-High-ALR bit is set ('1'), and the ALARM pin goes low (if enabled).

If EALR-D2-High = '0', the D2-High alarm is masked. When D2 is above the specified

range, the ALARM pin does not go low, but the D2-High-ALR bit is set.

D1 fail alarm enable bit.

If EALR-D1-FAIL = '1', the D1-Fail alarm is enabled. When D1 fails, the D1-FAIL-ALR bit is

EALR-D1-FAIL

R/W

set ('1'), the ALARM pin goes low (if enabled).

If EALR-D1-FAIL = '0', the D1-FAIL alarm is masked. When D1 fails, the ALARM pin does

not go low, but the D1-FAIL-ALR bit is set.

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