STLM75DS2F datasheet(16/37 Pages) STMICROELECTRONICS

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Functional description

STLM75

16/37

Functional description

The STLM75 registers have unique pointer designations which are defined in Table 5 on

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

●

Over-limit signal temperature register (TOS)

●

Hysteresis temperature register (THYS)

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 Table 4).

The command register retains pointer information between operations (see Table 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

000

Pointer/register

select bits

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