7

Interrupt

There are two interrupt thresholds, 8 bits in size. If threshold registers 02h and 03h are zero, the high and low

interrupts are disabled respectively.

The threshold ranges are from -39.68 °C to 122.88 °C with a step of 0.64 °C for each threshold. The value of both

thresholds is calculated as follows:

Threshold = (temp_limit_reg -63) *0.64°C

Register

Description

Threshold range

TEMP_H_LIMIT

Unsigned value, the high temperature limit is internally decoded as

(TEMP_H_LIMIT-63)*0.64°C. Writing 0 disables the high limit interrupt.

-39.68 °C : 122.88 °C

Step 0.64°C/LSB

TEMP_L_LIMIT

Unsigned value, the low temperature limit is internally decoded as

(TEMP_L_LIMIT-63)*0.64°C. Writing 0 disables the low limit interrupt.

-39.68 °C : 122.88 °C

Step 0.64°C/LSB

TEMP_H_LIMIT

TEMP_L_LIMIT

Internal decoded threshold

255

Threshold set to 122.88 °C

...

...

63

Threshold set to 0 °C

...

...

1

Threshold set to -39.68 °C

0

Threshold disabled

STTS22H

Interrupt

DS12606 - Rev 4

page 16/29