AS3517H-ECTP datasheet(51/94 Pages) AMSCO

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AS3517 V17

Data Sheet, Confidential

www.austriamicrosystems.com

9.3.3

Supervisor

General

This supervisor function can be used for automatic detection of BVDD brown out or junction over-temperature condition.

BVDD Supervision

The supervision level can be set in 8 steps @ 60mV from 2.74 to 3.16V. If the level is reached an interrupt can be generated. If BVDD

reaches 2.7V the AFE shuts down automatically.

Junction Temperature Supervision

The temperature supervision level can also be set by 5 bits (120 to –15oC). If the temperature reaches this level, an interrupt can be

generated. The over-temperature shutdown level is always 20oC higher.

Power Rail Monitoring

The 4 main regulators have an extra monitor which measures the output voltage of the regulator. This power rail monitors are independent

from the 10bit ADC. To activate these please see related registers.

Table 40 Supervisor Related Register

Name

Base

Offset

Description

SUPERVISOR

2-wire serial

21h

Battery and junction temperature supervision threshold levels

IRQ_ENRD_0

2-wire serial

23h

Enable/disable PVDD/CVDD monitoring interrupt and shutdown

IRQ_ENRD_1

2-wire serial

24h

Enable/disable PVDD/CVDD monitoring interrupt and shutdown

IRQ_ENRD_2

2-wire serial

25h

Enable/disable battery brown out interrupt

IRQ_ENRD_3

2-wire serial

26h

Enable/disable junction temperature interrupt

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