STTS751 register summary

STTS751

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Doc ID 16483 Rev 5

4.9

Therm limit

The Therm limit is a read/write register located at address 20h. The power-on default value

is 85 °C (55h). The format is 8-bit, two's complement integer. This is the same format as

the upper byte of the temperature register (Section 4.2: Temperature register format).

Whenever the temperature exceeds the value of the therm limit, the Addr/Therm output will

be asserted (low). See Section 6 for more information.

4.10

Therm hysteresis

The Therm hysteresis values controls the hysteresis for Addr/Therm output. Once Therm

output has asserted, it will not de-assert until the temperature has fallen below the

respective therm limit minus the therm hysteresis value. See Section 5 for more

information.

The therm hysteresis register is read/write and is located at address 21h. The power-up

default value is 10 °C (0Ah). The format is 8-bit, two's complement integer.

4.11

SMBus timeout register

At power-up, the STTS751 is configured with an SMBus timeout of 25 to 35 milliseconds

TIMEOUT: [bit 7]

1: SMBus timeout is enabled. Default condition.

0: SMBus timeout is disabled.

[bits 6:0] Not used - reserved.

Table 20.

Therm limit

ADDR

(hex)

R/W

Register

b7

b6

b5

b4

b3

b2

b1

b0

Power-up

default (hex)

20

R/W

Therm

sign

64 °C

32 °C

16 °C

8 °C

4 °C

2 °C

1 °C

55 (85 °C, dec)

Table 21.

Therm hysteresis

ADDR

(hex)

R/W

Register

b7

b6

b5

b4

b3

b2

b1

b0

Power-up

default (hex)

21

R/W

Therm hysteresis

sign

64 °C

32 °C

16 °C

8 °C

4 °C

2 °C

1 °C

0A (10 °C, dec)

Table 22.

SMBus timeout register

ADDR

(hex)

R/W

Register

b7

b6

b5

b4

b3

b2

b1

b0

Power-up

default (hex)

22

R/W

SMBus timeout TIMEOUT

0

0

0

0

0

0

0

80