AS3525-A/-B C22O22
Data Sheet, Confidential
7.4.17
Supervisor
7.4.17.1 General
This supervisor function can be used for automatic detection of BVDD brown out or junction over-temperature condition.
7.4.17.2 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 AFE shuts down automatically.
7.4.17.3 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.
7.4.17.4 Register Description
Table 143 Supervisor Related Register
Name
Base
Offset
Description
IRQ_ENRD_0
IRQ_ENRD_1
I2C audio master
I2C audio master
0x25
0x26
Enable/disable battery brown out interrupt
Enable/disable junction temperature interrupt
Table 144 Supervisor Register
Name
Base
Default
0x00
Supervisor
I2C audio master
Supervisor Register
This register is reset at a DVDD-POR.
Offset: 0x24
Bit
Bit Name
Default
000
Access
Bit Description
supervision of BVDD brown out
7:5
BVDD_Sup<2:0>
R/W
V_BrownOut=2.74+x*60mV
000: 2.74V
001: 2.80V
…
110: 3.10V
111: 3.16V
4:0
JT_Sup<4:0>
00000
R/W
junction temperature supervision:
Temp_ShutDown=140-x*5°C
Temp_IRQ=120-x*5°C
© 2005-2009, austriamicrosystems AG, 8141 Unterpremstaetten, Austria-Europe. All Rights Reserved.
www.austriamicrosystems.com Revision 1.13
156 - 194
AMSCO [ AMS(艾迈斯) ]
