Datasheet
ADT7411
Rev. B | Page 26 of 36
Internal T
LOW
Limit Register (Read/Write) [Address = 26h]
This limit register is an 8-bit read/write register that stores the
twos complement of the internal temperature lower limit that
causes an interrupt and activates the INT/
INT
output (if enabled).
For this to happen, the measured internal temperature value has
to be more negative than or equal to the value in this register.
Because it is an 8-bit register, the temperature resolution is 1°C.
The default value is −55°C.
Positive Temperature = Li
mit Register Code (d)
Negative Temperature = Li
mit Register Code (d) − 256
Table 43. Internal T
LOW
Limit
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
1
1
1
1
0
1
0
1
1
1
0
1
0
1
1
1
1
Default settings at power-up.
External T
HIGH
/AIN1 V
HIGH
Limit Register (Read/Write)
[Address = 27h]
If Pin 7 and Pin 8 are configured for the external temperature
sensor, this limit register is an 8-bit read/write register that
stores the twos complement of the external temperature upper
limit that causes an interrupt and activates the INT/
INT
output
(if enabled). For this to happen, the measured external
temperature value has to be greater than the value in this
register. Because it is an 8-bit register, the temperature
resolution is 1°C. The default value is −1°C.
Positive Temperature = Li
mit Register Code (d)
Negative Temperature = Li
mit Register Code (d) − 256
If Pin 7 and Pin 8 are configured for AIN1 and AIN2 single-
ende
d inputs, this limit register is an 8-bit read/write register
that stores the AIN1 input upper limit that causes an interrupt
and activates the INT/
INT
output (if enabled). For this to
happen, the measured AIN1 value has to be greater than the
value in this register. Because it is an 8-bit register, the
resolution is four times less than the resolution of the 10-bit
ADC. Because the power-up default settings for Pin 7 and Pin 8
are AIN1 and AIN2 single-ended inputs, the default value for
this limit register is full-scale voltage.
Table 44. AIN1 V
HIGH
Limit
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Default settings at power-up.
External T
LOW
/AIN1 V
LOW
Limit Register (Read/Write)
[Address = 28h]
If Pin 7 and Pin 8 are configured for the external temperature
sensor, this limit register is an 8-bit read/write register that
stores the twos complement of the external temperature lower
limit that causes an interrupt and activates the INT/
INT
output
(if enabled). For this to happen, the measured external temperature
value has to be more negative than or equal to the value in this
register. Because it is an 8-bit register, the temperature
resolution is 1°C. The default value is 0°C.
Positive Temperature = Li
mit Register Code (d)
Negative Temperature = Li
mit Register Code (d) − 256
If Pin 7 and Pin 8 are configured for AIN1 and AIN2 single-
ende
d inputs, this limit register is an 8-bit read/write register
that stores the AIN1 input lower limit that causes an interrupt
and activates the INT/
INT
output (if enabled). For this to
happen, the measured AIN1 value has to be less than or equal
to the value in this register. Because it is an 8-bit register, the
resolution is four times less than the resolution of the 10-bit
ADC. Because the power-up default settings for Pin 7 and Pin 8
are AIN1 and AIN2 single-ended inputs, the default value for
this limit register is 0 V.
Table 45. AIN1 V
LOW
Limit
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
Default settings at power-up.
AIN2 V
HIGH
Limit Register (Read/Write) [Address = 2Bh]
This limit register is an 8-bit read/write register that stores the
AIN2 input upper limit that causes an interrupt and activates
the INT/
INT
output (if enabled). For this to happen, the
measured AIN2 value has to be greater than the value in this
register. Because it is an 8-bit register, the resolution is four
times less than the resolution of the 10-bit ADC. The default
value is full-scale voltage.
Table 46. AIN2 V
HIGH
Limit
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Default settings at power-up.