Dual RF LDMOS Bias Controller with
Nonvolatile Memory
MEASUREMENT VALUE
(TEMPERATURE OR CURRENT)
HIGH THRESHOLD
LOW THRESHOLD
ALARM OUTPUT
COMPARATOR MODE
(ACTIVE LOW)
INTERRUPT MODE
(ACTIVE LOW)
TIME
ALARM FLAG
REGISTER
READ
ALARM FLAG
REGISTER
READ
TIME
Figure 21. ALARM Output Signal Example—Alarm Thresholds Configured for Hysteresis Mode
HIGHEST POSSIBLE THRESHOLD
VALUE (DEFAULT VALUE FOR HIGH
THRESHOLD REGISTER)
ALARM OUTPUT ASSERTED
WHEN MEASURED VALUE
RISES ABOVE THIS LEVEL
ALARM OUTPUT ASSERTED
WHEN MEASURED VALUE
HIGH THRESHOLD
LOW THRESHOLD
FALLS BELOW THIS LEVEL*
RANGE OF VALUES THAT WILL
NOT CAUSE AN ALARM
LOWEST POSSIBLE THRESHOLD
VALUE (DEFAULT VALUE FOR LOW
*ONLY WHEN ALARM IS CONFIGURED FOR COMPARATOR MODE. WHEN IN INTERRUPT
MODE, FLAG REGISTER MUST BE READ FOR ALARM TO BE DEASSERTED.
Figure 22. ALARM Output Signal Example—Alarm Thresholds Configured for Hysteresis Mode
THRESHOLD REGISTER)
36
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