STCN75DS2E STMICROELECTRONICS [STMicroelectronics], STCN75DS2E Datasheet - Page 18

• Manufacturer Part Number: STCN75DS2E
• Description: Digital temperature sensor and thermal watchdog
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

3.1.5
3.2
Note:
18/35
Hysteresis temperature register (T
T
programmable lower trip-point temperature for the thermal alarm in two’s complement
format (see
0000).
The format of this register is the same as that of the Temperature register. The MSB
position contains the sign bit for the digital temperature and Bit14 contains the temperature
MSB.
Table 8.
1. These are comparable formats to the DS75 and LM75.
Power-up default conditions
The STCN75 always powers up in the following default states:
●
●
●
●
●
●
After power-up these conditions can be reprogrammed via the serial interface.
STCN75
HYS
Bytes
Bits
Keys: S = two’s complement sign bit
Thermostat mode = comparator mode
Polarity = active-low
Fault tolerance = 1 fault (i.e., relevant bits set to '0' in the configuration register)
T
T
Register pointer = 00 (temperature register)
register is a two-byte (16-bit) READ/WRITE register that stores the user-
OS
HYS
= 80°C
TMSB = temperature MSB
TLSB = temperature LSB
TD = temperature Data
MSB
= 75°C
15
Table
S
T
OS
and T
TMSB
8). This register defaults to 75°C at power-up (i.e., 0100 1011 0000
14
HYS
TD TD TD TD TD TD
13
HS byte
register format
12
TMSB
11
10
(1)
HYS
9
)
8
TLSB
9-bit
7
6
0
5
0
TLSB
LS byte
4
0
3
0
2
0
1
0
LSB
0
0