AT30TSE004_14 Datasheet, PDF (16/47 Pages) ATMEL Corporation – Integrated Temperature Sensor with Serial EEPROM

Table 6-6. Configuration Register Bit Description (Continued)
Bit
Symbol
Description
Crit_Alarm Lock bit:
0 = The Crit_Alarm Register can be updated (power-on default).
7
CRTALML 1 = The Crit_Alarm Register is locked and cannot be updated.
This bit locks the Critical Alarm Register from being updated.
Once set, it can only be cleared to a Logic 0 by an internal Power-On Reset.
Alarm Window Lock bit:
0 = The Upper Limit and Lower Limit Registers can be updated (power-on default).
6
WINLOCK
1 = The Upper and Lower Limit Registers are locked and cannot be updated.
Once set, it can be only be cleared to a Logic 0 by an internal Power-On Reset.
EVENT Clear:
0 = Has no effect (power-on default).
5
EVTCLR
1 = Clears (releases) the active EVENT pin in Interrupt Mode.
This bit will clear the EVENT pin after it has been enabled. This bit is a
write-only bit and will read as a Logic 0 and is ignored when in Comparator Mode.
EVENT Pin Output Status:
4
EVTSTS
0 = The EVENT output is not asserted by the device (power-on default).
1 = The EVENT output is asserted due to a limit or alarm condition.
EVENT Output Control:
0 = The EVENT output is disabled and will not generate interrupts (power-on default).
3
EVTOUT
1 = The EVENT output is enabled.
This bit cannot be altered if the Crit_Alarm or the Alarm Window Lock bits is set.
Critical Temperature only:
0 = The EVENT output is asserted if the measured temperature is above the Upper Limit or Critical
Alarm, or is below the Lower Limit (power-on default).
2
CRITEVT
1 = The EVENT output is asserted only for a Critical Alarm violation when the temperature is
greater then the Crit_Alarm.
This bit cannot be altered if the Alarm Window Lock bit is set.
EVENT Polarity:
0 = The EVENT pin is active low (power-on default).
1
EVTPOL
1 = The EVENT pin is active high.
This bit cannot be altered if the Crit_Alarm or the Alarm Window Lock bit is set.
A pull-up resistor is required on this pin to achieve the Logic 1 state.
EVENT Mode:
0 = The EVENT pin will operate in Comparator Mode (power-on default).
0
EVTMOD
1 = The EVENT pin will operate in Interrupt Mode.
This bit cannot be altered if the Crit_Alarm or the Alarm Window Lock bit is set.
Atmel AT30TSE004 [PRELIMINARY DATASHEET] 16
8816B–DTS–12/2012