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May 12, 2010
IDT Confidential
HYST Bit Decode
Bit 8 SHDN-Shutdown. The thermal sensing device and A/D converters are disabled to save power, no events will be generated. When either of
the lock bits is set, this bit cannot be set until unlocked. However it can be cleared at any time. When in shutdown mode, the TSE2002B3C still
responds to commands normally, however bus timeout may or may not be supported in this mode.
'0' (default); The temperature monitor is active and converting
'1'; The temperature monitor is disabled and will not generate interrupts or update the temperature data.
Bit 7 TCRIT_LOCK; Locks the TCRIT Limit Register from being updated.
'0' (default; The TCRIT Limit Register can be updated normally.
'1'; The TCRIT Limit Register is locked and cannot be updated. Once this bit has been set, it cannot be cleared until an internal
power on reset.
Bit 6 EVENT_LOCK; Locks the High and Low Limit Registers from being updated.
'0' (default); The High and Low Limit Registers can be updated normally.
'1'; The High and Low Limit Registers are locked and cannot be updated. Once this bit has been set, it cannot be cleared until
an internal power on reset.
Bit 5 CLEAR; Clears the EVENT pin when it has been asserted. This bit is write only and will always read '0'.
'0'; does nothing
'1'; The EVENT
pin is released and will not be asserted until a new interrupt condition occurs. This bit is ignored if the device
is operating in Comparator Mode. This bit is self clearing.
Bit 4 EVENT_STS; Indicates if the EVENT
pin is asserted. This bit is read only.
0' (default); The EVENT pin is not asserted.
'1'; The EVENT
pin is being asserted by the device.
Bit 3 EVENT_CTRL; Masks the EVENT
pin from generating an interrupt. If either of the lock bits are set (bit 7 and bit 6), then this bit cannot be
altered.
'0' (default); The EVENT
pin is disabled and will not generate interrupts.
'1'; The EVENT pin is enabled.
Bit 2 TCRIT_ONLY; Controls whether the EVENT
pin will be asserted from a high / low out-of-limit condition. When the EVENT_LOCK bit is set,
this bit cannot be altered.
'0' (default); The EVENT
pin will be asserted if the measured temperature is above the High Limit or below the Low Limit in
addition to if the temperature is above the TCRIT Limit.
'1'; The EVENT
pin will only be asserted if the measured temperature is above the TCRIT Limit.
Bit 1 EVENT_POL; Controls the active state of the EVENT
pin. The EVENT
pin is driven to this state when it is asserted.
HYST[1:0]
Hysteresis
1
0
0
0
Disable hysteresis (default)
0
1
1.5癈
1
0
3癈
1
1
6癈