STCN75DS2F View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'STCN75DS2F' PDF : 35 Pages View PDF
Functional description
STCN75
Table 5. Register pointers selection summary
Pointer
value (H)
P1
P0
Name
Description
Width Type Power-on
(bits) (R/W) default
Comments
00
0
0
TEMP
Temperature
register
16
Read-
only
N/A
To store measured temperature
data
01
0
1
CONF
Configuration
register
8 R/W
00
02
1 0 THYS Hysteresis register 16 R/W 4B00 Default = 75 °C
03
11
TOS
Overtemperature
shutdown
16 R/W
5000
Set point for overtemperature
shutdown (TOS) limit default = 80
°C
3.1.2
Configuration register
The configuration register is used to store the device settings such as device operation
mode, OS/INT operation mode, OS/INT polarity, and OS/INT fault queue.
The configuration register allows the user to program various options such as thermostat
fault tolerance, thermostat polarity, thermostat operating mode, and shutdown mode. The
user has READ/WRITE access to all of the bits in the configuration register except the MSB
(Bit7), which is reserved as a “Read only” bit (see Table 6). The entire register is volatile and
thus powers-up in its default state only.
Table 6. Configuration register format
MSB
LSB
Byte
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
STCN75
0
0
0
FT1
FT0
POL
M
SD
Default
0
0
0
0
0
0
0
0
Keys: SD = shutdown control bit
M = thermostat mode(1)
POL = output polarity(2)
FT1 = fault tolerance1 bit
Bit 5 = must be set to '0'.
Bit 6 = must be set to '0'.
FT0 = fault tolerance0 bit
Bit 7 = must be set to '0'.
1. Indicates operation mode; 0 = comparator mode, and 1 = interrupt mode (see Section 2.3: Comparator mode and
Section 2.4: Interrupt mode).
2. The OS is active-low ('0').
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Doc ID 13307 Rev 9
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