Datasheet

ADT7320 Data Sheet
Rev. 0 | Page 14 of 24
CONFIGURATION REGISTER
This 8-bit read/write register (Register Address 0x01) stores various
configuration modes for the ADT7320, including shutdown,
overtemperature and undertemperature interrupts, one-shot,
continuous conversion, interrupt pin polarity, and
overtemperature fault queues.
Table 8. Configuration Register (Register Address 0x01)
Bit(s)
Default
Value Type Name Description
[1:0] 00
R/W
Fault queue
These two bits set the number of undertemperature/overtemperature faults that can
occur before setting the INT and CT pins. This helps to avoid false triggering due to
temperature noise.
00 = 1 fault (default).
01 = 2 faults.
10 = 3 faults.
11 = 4 faults.
[2] 0
R/W
CT pin polarity This bit selects the output polarity of the CT pin.
0 = active low.
1 = active high.
[3] 0
R/W
INT pin polarity This bit selects the output polarity of the INT pin.
0 = active low.
1 = active high.
[4] 0
R/W
INT/CT mode This bit selects comparator mode or interrupt mode.
0 = interrupt mode.
1 = comparator mode.
[6:5] 00
R/W
Operation mode These two bits set the operational mode of the ADT7320.
00 = continuous conversion (default). When one conversion is finished, the ADT7320
begins the next conversion.
01 = one-shot mode. Conversion time is typically 240 ms.
10 = 1 SPS mode. Conversion time is typically 60 ms. This operational mode reduces the
average current consumption.
11 = shutdown. All circuitry except for the interface circuitry is powered down.
[7] 0
R/W
Resolution This bit sets the resolution of the ADC when converting.
0 = 13-bit resolution. Sign bit + 12 bits gives a temperature resolution of 0.0625°C.
1 = 16-bit resolution. Sign bit + 15 bits gives a temperature resolution of 0.0078°C.