AMC7836_15 Datasheet, PDF (63/87 Pages) Texas Instruments – AMC7836 High-Density, 12-Bit Analog Monitor and Control Solution With Multichannel ADC, Bipolar DACs, Temperature Sensor, and GPIO Ports

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7.6.10 GPIO: Address 0x7A
7.6.10.1 GPIO Register (address = 0x7A) [reset = 0xFF]
AMC7836
SLAS986B – NOVEMBER 2014 – REVISED FEBRUARY 2015
7
GPIO-7
R/W-1
6
GPIO-6
R/W-1
Bit Field
7
GPIO-7
6
GPIO-6
5
GPIO-5
4
GPIO-4
3
GPIO-3
2
GPIO-2
1
GPIO-1
0
GPIO-0
Figure 97. GPIO Register (R/W)
5
GPIO-5
R/W-1
4
GPIO-4
R/W-1
3
GPIO-3
R/W-1
2
GPIO-2
R/W-1
1
GPIO-1
R/W-1
0
GPIO-0
R/W-1
Table 46. GPIO Register Field Descriptions
Type
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Reset
1
1
1
1
1
1
1
1
Description
For write operation the GPIO pin operates as an output. Writing
a 1 to the GPIO-n bit sets the GPIO-N pin to high impedance.
Writing a 0 sets the GPIO-n pin to logic low.
For read operations the GPIO pin operates as an input. Read
the GPIO-n bit to receive the status of the GPIO-n pin.
The GPIO-n pin has 48-kΩ input impedance to IOV_DD.
7.6.11 Out-Of-Range ADC Thresholds: Address 0x80 through 0x93
The unipolar analog inputs (LV_ADC16 to LV_ADC20) 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.
7.6.11.1 ADCn-Upper-Thresh (Low Byte) Register (address = 0x80 through 0x93) [reset = 0xFF]
Figure 98. ADCn-Upper-Thresh (Low Byte) Register (R/W)
7
6
5
4
3
2
1
0
THRUn(7:0)
R/W-All ones
Table 47. ADCn-Upper-Thresh (Low Byte) Register Field Descriptions
Bit Field
7-0 THRUn(7:0)
Type
R/W
Reset
All ones
Description
Sets 12-bit upper threshold value for the ADC_n channel in
straight binary format.
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