Datasheet

ADT7420 Data Sheet
Rev. 0 | Page 16 of 24
T
HYST
SETPOINT REGISTER
This 8-bit read/write register stores the temperature hysteresis
value for the T
HIGH
, T
LOW
, and T
CRIT
temperature limits. The
temperature hysteresis value is stored in straight binary format
using four LSBs. Increments are possible in steps of 1°C from
0°C to 15°C. The value in this register is subtracted from the
T
HIGH
and T
CRIT
values and added to the T
LOW
value to imple-
ment hysteresis.
ID REGISTER
This 8-bit read-only register stores the manufacture ID in Bit 3
to Bit 7 and the silicon revision in Bit 0 to Bit 2. The default
setting for the ID register is 0xCB.
Table 18. T
HYST
Setpoint Register (Register Address 0x0A)
Bit Default Value Type Name Description
[3:0] 0101
R/
W
T
HYST
Hysteresis value, from 0°C to 15°C. Stored in straight binary format. The default setting is 5°C.
[7:4] 0000
R/
W
N/A Not used.
Table 19. ID Register (Register Address 0x0B)
Bit Default Value Type Name Description
[2:0] 011 R Revision ID Contains the silicon revision identification number
[7:3] 11001 R Manufacture ID Contains the manufacture identification number