14 Atmel AT30TS00 [Preliminary]
8585BSEEPR8/10
Bit
Symbol
Description
7
CRTALML
Crit_Alarm Trip Lock bit
Locks the Critical Alarm Trip register from being updated
0 = Crit_Alarm Trip register can be updated (Power-on default)
1 = Crit_Alarm Trip register is locked and cannot be updated
Once set, it can be only be cleared to 0 by internal power on reset (POR) which occurs when
the device is powered off and then powered on
6
WINLOCK
Alarm Window Lock bit
0 = Upper and Lower Alarm Trip Registers can be updated (Power-on default)
1 = Upper and Lower Alarm Trip Registers are locked and cannot be updated
Once set, it can be only be cleared to 0 by internal power on reset (POR) when device is
powered off then powered on
5
EVTCLR
VENT
Clear. This bit is a Write only bit and will read 0
This bit can clear the VENT
pin after it has been enabled and is self clearing
0 = has no effect (power-on default)
1 = clears (releases) the active VENT
pin in interrupt mode. This bit is ignored when in
comparator mode
4
EVTSTS
VENT
Status. This is a Read only bit
This bit indicates if the
VENT
Output is asserted by the device
0 = The VENT
pin is not asserted. (Power-on default)
1 = The device is asserting (drives low) the VENT
output due to Alarm trip condition
3
EVTOUT
VENT
Output Control
This bit, when set, prevents the
VENT
pin from generating an interrupt
0 = The VENT
output is disabled and will not generate interrupts (Power-on default)
1 = The VENT
output is enabled
When either of the Crit_Alarm Trip or Alarm Window lock bits is set, this bit cannot be altered
until unlocked
2
CRITEVT
Critical Temperature only
0 = The VENT
output is asserted for the Upper, Lower and Critical Alarms (Power-on default).
1 = The VENT
output is asserted for only Critical Alarm when ambient temperature > Crit_Alarm
trip boundary
When the Alarm Window lock bit is set, this bit cannot be altered until unlocked
1
EVTPOL
VENT
Polarity
0 = Active LOW. (Power-on default)
A pull-up resistor is required on this pin to set inactive state
1 = Active HIGH
When either of the Crit_Alarm Trip or Alarm Window lock bits is set, this bit cannot be altered
until unlocked
0
EVTMOD
VENT
Mode
0 = The
VENT
pin will operate in Comparator mode. (Power-on default)
1 = The VENT
pin will operate in Interrupt mode
When either of the Crit_Alarm Trip or Alarm Window lock bits is set, this bit cannot be altered
until unlocked
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