ADT7318 데이터 시트보기 (PDF) - Analog Devices
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ADT7318 Datasheet PDF : 44 Pages
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ADT7316/ADT7317/ADT7318
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]
This 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 01
01
01
01
01
1 Default settings at power-up.
Table 12. Interrupt Status 1 Register
Bit Function
D0 1 when internal temperature value exceeds THIGH limit. Any
internal temperature reading greater than the limit set
causes an out-of-limit event.
D1 1 when internal temperature value exceeds TLOW 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 THIGH 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 TLOW 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
temperature sensor.
Interrupt Status 2 Register (Read-Only) [Address 0x01]
This 8-bit, read-only register reflects the status of the VDD
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 01 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 VDD value is greater than the corresponding VHIGH
limit.
1 when VDD is less than or equal to the corresponding VLOW
limit.
Internal Temperature Value/VDD 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/VDD LSBs
D7 D6 D5 D4 D3 D2
N/A N/A N/A N/A V1 LSB
N/A N/A N/A N/A 01 01
1 Default settings at power-up.
D1 D0
T1 LSB
01
01
Table 16. Internal Temperature/VDD LSBs Bit Descriptions
Bit Function
D0 LSB of internal temperature value.
D1 B1 of internal temperature value.
D2
LSB of VDD value.
D3
B1 of VDD 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 01 01
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.
VDD 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. VDD Value MSBs
D7 D6 D5 D4 D3 D2 D1 D0
V9 V8 V7 V6 V5 V4 V3 V2
X1
X1
X1
X1
X1
X1
X1
X1
1 Loaded with VDD 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
01
01
01
01
01
01
01
01
1 Default settings at power-up.
Rev. B | Page 28 of 44
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