Publication Release Date: 2009/11/19

Version: 1.91

- 10 -

W83L771AWG/W83L771ASG

7.4

A

CRIT

T

_

_

Output and T_CRIT flags

A

CRIT

T

_

_

Output pulls low when the measured temperature exceeds the critical temperature

(T_CRIT) defined in 19h, and 20h for Remote, and Local T_CRIT set point, respectively. Once the

A

CRIT

T

_

_

Output pulls low, it will not be set high until the measured temperature is lower than

(T_CRIT － TH), where TH is Temperature Hysteresis. Status Register will not be reset until it is read

and the temperature conversion falls below the T_CRIT set point. The ALERT will also be asserted for

T_CRIT event, Figure 7.4 shows this mechanism. Please also refer to the W83L771AWG_773G_775G

Application Note 4.x.pdf for implementation.

Fig. 7.4 Response of

A

CRIT

T

_

_

output

T_CRIT# Set point

TH Value

T_CRIT - TH

Measured temperature by W83L771

W83L771 T_CRIT# pin

W83L771 T_CRIT status

W83L771 read command for

status register

W83L771 ALERT# pin

W83L771 status register read

ALERT Mask will be set