
AS3515 V15
austriamicrosystems
Data Sheet, Confidential
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Revision 3.1
42
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6.15 Supervisor
6.15.1 General
This supervisor function can be used for automatic detection of BVDD brown out or junction over-temperature condition.
6.15.2 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 2.6V the AS3515 shuts down automatically.
6.15.3 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. If the IRQ level is set to 120oC the shutdown is disabled.
6.15.4 Register Description
Interrupts for battery supervision has to be enabled in the IRQ_ENRD0 register (0x25h), while the over-temperature interrupt is controlled
via the IRQ_ENRD1 register (0x26h). All other functions can be set via the following register.
SUPERVISOR Register (24h)
Table 43 Supervisor Register
Bit
Name
Description
7..5
BVDD_Sup<2:0> Supervision of BVDD brown out
V_BrownOut=2.74+x*60mV
000: 2.74V
001: 2.80V
…
110: 3.10V
111: 3.16V
4..0
JT_Sup<4:0>
Junction temperature supervision:
Temp_ShutDown=140-x*5
°C
Temp_IRQ=120-x*5
°C
JT_Sup
IRQ
00000
00001
00010
:
11110
11111
120oC
115oC
110oC
:
-30oC
-35oC
ShutDown
OFF
135oC
130oC
:
-10oC
-15oC
The register is R/W; default value is 00h
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