SE98A_4
?NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 04  25 November 2009
20 of 43
NXP Semiconductors
SE98A
DDR memory module temp sensor, 1.7 V to 3.6 V
 
 
1
EP
EVENT
 Polarity.
0  active LOW (default).
1  active HIGH.
When either of the Critical Trip or Alarm Window lock bits is set, this bit cannot
be altered until unlocked.
0
EMD
EVENT
 Mode.
0  comparator output mode (default)
1  interrupt mode
When either of the Critical Trip or Alarm Window lock bits is set, this bit cannot
be altered until unlocked.
Table 9.
Configuration register (address 01h) bit description &continued
Bit
Symbol
Description
Table 10.   Hysteresis enable
Action
Below Alarm Window bit (bit 13)
Above Alarm Window bit (bit 14)
Above Critical Trip bit (bit 15)
Temperature
slope
Threshold
temperature
Temperature
slope
Threshold
temperature
Temperature
slope
Threshold
temperature
sets
falling
T
trip(l)
 T
hys
rising
T
trip(u)
rising
T
th(crit)
clears
rising
T
trip(l)
falling
T
trip(u)
 T
hys
falling
T
th(crit)
  T
hys
Fig 12.   Hysteresis: how it works
002aac799
current temperature
time
temperature
set
clear
clear
set
clear
clear
set
clear
Below Alarm Window
(register 05h;
bit 13 = BAW bit)
Above Alarm Window
(register 05h;
bit 14 = AAW bit)
Above Critical Trip
(register 05h;
bit 15 = ACT bit)
lower alarm
threshold
upper alarm
threshold
critical alarm
threshold
hysteresis
hysteresis
hysteresis
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