Datasheet

Functional description STLM75
16/40 Doc ID 13296 Rev 12
3 Functional description
The STLM75 registers have unique pointer designations which are defined in Tabl e 5 o n
page 17. Whenever any READ/WRITE operation to the STLM75 register is desired, the user
must “point” to the device register to be accessed.
All of these user-accessible registers can be accessed via the digital serial interface at
anytime (see Serial interface on page 20), and they include:
● Command register/address pointer register
● Configuration register
● Temperature register
● Overlimit signal temperature register (T
OS
)
● Hysteresis temperature register (T
HYS
)
3.1 Registers and register set formats
3.1.1 Command/pointer register
The most significant bits (MSBs) of the command register must always be zero. Writing a '1'
into any of these bits will cause the current operation to be terminated (bit 2 through bit 7
must be kept '0', see Ta bl e 4 ).
The command register retains pointer information between operations (see Tabl e 5 ).
Therefore, this register only needs to be updated once for consecutive READ operations
from the same register. All bits in the command register default to '0' at power-up.
Table 4. Command/pointer register format
MSB LSB
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
000000P1P0
Pointer/register
select bits