AMC7832 Datasheet, PDF (51/70 Pages) Texas Instruments – AMC7832 12-Bit Analog Monitor and Control Solution with Multi-Channel ADC, Bipolar DACs, Temperature Sensor and GPIO Ports

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AMC7832
SLAS836 – MARCH 2014
8.5.11 Out-Of-Range ADC Thresholds: Address 0x80 – 0x93
The unipolar analog inputs (LV_ADC12 to LV_ ADC16) and the local temperature sensor implement an out-of-
range alarm function. The Upper-Thresh and Lower-Thresh registers define the upper bound and lower bounds
for these inputs. This window determines whether the analog input or temperature is out-of-range. When the
input is outside the window, the corresponding CH-ALR-n bit in the Status Register is set to '1'. For normal
operation, the value of the upper threshold must be greater than the value of lower threshold; otherwise, an
alarm is always indicated. The analog input threshold values are specified in straight binary format while the local
temperature ones are specified in two’s complement format.
Table 39. Register name: ADCn-Upper-Thresh (low byte) – Address: 0x80 - 0x93, Default: 0xFF
(READ/WRITE)
REGISTER
NAME
ADCn
Upper
Thresh (low)
ADDRESS
0x80 to
0x93
BIT NAME
7:0 THRUn(7:0)
DESCRIPTION
Sets 12-bit upper threshold value for the ADC_n channel in
straight binary format.
DEFAULT
VALUE
0xFF
Table 40. Register name: ADCn-Upper-Thresh (high byte) – Address: 0x80 - 0x93, Default: 0x0F
(READ/WRITE)
REGISTER
NAME
ADCn
Upper
Thresh
(high)
ADDRESS
0x80 to
0x93
BIT NAME
7:4 Reserved
3:0 THRUn(11:8)
DESCRIPTION
Reserved for factory use.
Sets 12-bit upper threshold value for ADC_n channel in straight
binary format.
DEFAULT
VALUE
All zeros
0x0F
Table 41. Register name: ADCn-Lower-Thresh (low byte) – Address: 0x80 - 0x93, Default: 0x00
(READ/WRITE)
REGISTER
NAME
ADCn
Lower
Thresh (low)
ADDRESS
0x80 to
0x93
BIT NAME
7:0 THRLn(7:0)
DESCRIPTION
Sets 12-bit lower threshold value for the ADC_n channel in
straight binary format.
DEFAULT
VALUE
0x00
Table 42. Register name: ADCn-Lower-Thresh (high byte) – Address: 0x80 - 0x93, Default: 0x00
(READ/WRITE)
REGISTER
NAME
ADCn
Lower
Thresh
(high)
ADDRESS
0x80 to
0x93
BIT NAME
7:4 Reserved
3:0 THRLn(11:8)
DESCRIPTION
Reserved for factory use.
Sets 12-bit lower threshold value for ADC_n channel in straight
binary format.
DEFAULT
VALUE
All zeros
0x00
Table 43. Register name: LT-Upper-Thresh (low byte) – Address: 0x94, Default: 0xFF (READ/WRITE)
REGISTER
NAME
LT Upper
Thresh (low)
ADDRESS
0x94
BIT NAME
DESCRIPTION
7:0 THRU-LT(7:0) Sets 12-bit upper threshold value for the local temperature
sensor in two’s complement format.
DEFAULT
VALUE
0xFF
Table 44. Register name: LT-Upper-Thresh (high byte) – Address: 0x95, Default: 0x07 (READ/WRITE)
REGISTER
NAME
LT Upper
Thresh
(high)
ADDRESS
0x95
BIT NAME
DESCRIPTION
7:4 Reserved
Reserved for factory use.
3:0 THRU-LT(11:8) Sets 12-bit upper threshold value for the local temperature
sensor in two’s complement format.
DEFAULT
VALUE
All zeros
0x07
Copyright © 2014, Texas Instruments Incorporated
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