AMC7812SPAPR Datasheet, PDF (68/92 Pages) Texas Instruments – 12-Bit Analog Monitoring and Control Solution with Multichannel ADC, DACs, and Temperature Sensors

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.
BIT
NAME
DEFAULT
15
—
0
14
EALR-CH0
0
13
EALR-CH1
0
12
EALR-CH2
0
11
EALR-CH3
0
10 EALR-LT-Low
0
9 EALR-LT-High
0
8 EALR-D1-Low
0
7 EALR-D1-High
0
6 EALR-D2-Low
0
5 EALR-D2-High
0
4 EALR-D1-FAIL
0
Table 21. Alarm Control Register
R/W
DESCRIPTION
R 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
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
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
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
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,
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
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,
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
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,
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
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
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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