STTS75 datasheet(17/39 Pages) STMICROELECTRONICS

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STTS75

Functional description

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Functional description

The STTS75 registers have unique pointer designations which are defined in Table 6 on

page 17. Whenever any READ/WRITE operation to the STTS75 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 21), 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 (see Table 5).

The command register retains pointer information between operations. Therefore, this

Table 5.

Command/pointer register format

MSB

LSB

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

000

Pointer

Table 6.

Pointer

value

(H)

Name

Description

Width

(bits)

Type

(R/W)

Power-on

default

Comments

0000

TEMP

Temperature

Read

only

N/A

To store measured

temperature data

CONF

Configuration

8R/W

0210

THYS

Hysteresis

R/W

4800

Default = 75°C

0311

TOS

Over-

temperature

shutdown

R/W

5000

Set point for over-

temperature

shutdown (TOS) limit

default = 80°C

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