Datasheet
ADT7316/ADT7317/ADT7318
Rev. B | Page 28 of 44
REGISTER DESCRIPTIONS
The bit maps in this section show the register default settings at
power-up, unless otherwise noted.
Interrupt Status 1 Register (Read-Only) [Address 0x00]
T
his 8-bit, read-only register reflects the status of some of the
interrupts that can cause the INT/
INT
pin to go active. This
register is reset by a read operation, provided that any out-of-
limit event has been corrected. It is also reset by a software reset.
Table 11. Interrupt Status 1 Register
D7 D6 D5 D4 D3 D2 D1 D0
N/A N/A N/A 0
1
0
1
0
1
0
1
0
1
1
Default settings at power-up.
Table 12. Interrupt Status 1 Register
Bit Function
D0
1 when internal temperature value exceeds T
HIGH
limit. Any
internal temperature reading greater than the limit set
causes an out-of-limit event.
D1
1 when internal temperature value exceeds T
LOW
limit. Any
internal temperature reading less than or equal to the
limit set causes an out-of-limit event.
D2
1 when external temperature value exceeds T
HIGH
limit. The
default value for this limit register is –1°C, so any external
temperature reading greater than the limit set causes an
out-of-limit event.
D3
1 when external temperature value exceeds T
LOW
limit. The
default value for this limit register is 0°C, so any external
temperature reading less than or equal to the limit set
causes an out-of-limit event.
D4
1 indicates a fault (open or short) for the external
temper
ature sensor.
Interrupt Status 2 Register (Read-Only) [Address 0x01]
This 8-bit, read-only register reflects the status of the V
DD
interrupt that can cause the INT/
INT
pin to go active. This
register is reset by a read operation, provided that any out-of-
limit event has been corrected. It is also reset by a software reset.
Table 13. Interrupt Status 2 Register
D7 D6 D5 D4 D3 D2 D1 D0
N/A N/A N/A 0
1
N/A N/A N/A N/A
1
Default settings at power-up.
Table 14. Interrupt Status 2 Register Bit Descriptions
Bit Function
D4
1 when V
DD
value is greater than the corresponding V
HIGH
limit.
1 when V
DD
is less than or equal to the corresponding V
LOW
limit.
Internal Temperature Value/V
DD
Value Register LSBs
(Read-Only) [Address 0x03]
This 8-bit, read-only register stores the 2 LSBs of the 10-bit
temperature reading from the internal temperature sensor
and the 2 LSBs of the 10-bit supply voltage reading.
Table 15. Internal Temperature/V
DD
LSBs
D7 D6 D5 D4 D3 D2 D1 D0
N/A N/A N/A N/A V1 LSB T1 LSB
N/A N/A N/A N/A 0
1
0
1
0
1
0
1
1
Default settings at power-up.
Table 16. Internal Temperature/V
DD
LSBs Bit Descriptions
Bit Function
D0 LSB of internal temperature value.
D1 B1 of internal temperature value.
D2 LSB of V
DD
value.
D3 B1 of V
DD
value.
External Temperature Value Register LSBs (Read-Only)
[Address 0x04]
This 8-bit, read-only register stores the 2 LSBs of the 10-bit
temperature reading from the external temperature sensor.
Table 17. External Temperature LSBs
D7 D6 D5 D4 D3 D2 D1 D0
N/A N/A N/A N/A N/A N/A T1 LSB
N/A N/A N/A N/A N/A N/A 0
1
0
1
1
Default settings at power-up.
Table 18. External Temperature LSBs Bit Descriptions
Bit Function
D0 LSB of external temperature value.
D1 B1 of external temperature value.
V
DD
Value Register MSBs (Read-Only) [Address 0x06]
This 8-bit, read-only register stores the supply voltage value.
The 8 MSBs of the 10-bit value are stored in this register.
Table 19. V
DD
Value MSBs
D7 D6 D5 D4 D3 D2 D1 D0
V9 V8 V7 V6 V5 V4 V3 V2
X
1
X
1
X
1
X
1
X
1
X
1
X
1
X
1
1
Loaded with V
DD
value after power-up.
Internal Temperature Value Register MSBs (Read-Only)
[Address 0x07]
This 8-bit, read-only register stores the internal temperature
value from the internal temperature sensor in twos complement
format. The 8 MSBs of the 10-bit value are stored in this register.
Table 20. Internal Temperature Value MSBs
D7 D6 D5 D4 D3 D2 D1 D0
T9 T8 T7 T6 T5 T4 T3 T2
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
Default settings at power-up.