SE98A Datasheet, PDF (41/43 Pages) NXP Semiconductors – DDR memory module temp sensor, 1.7 V to 3.6 V

NXP Semiconductors
SE98A
DDR memory module temp sensor, 1.7 V to 3.6 V
Table 30. Abbreviations …continued
Acronym
Description
RDIMM
Registered Dual In-line Memory Module
SO-DIMM
Small Outline Dual In-line Memory Module
PC
Personal Computer
POR
Power-On Reset
RWP
Reversible Write Protection
SMBus
System Management Bus
SPD
Serial Presence Detect
15. Revision history
Table 31. Revision history
Document ID Release date
Data sheet status
Change notice
Supersedes
SE98A_2
Modifications:
20090806
Product data sheet
-
SE98A_1
• Section 1 “General description”, 3^rd paragraph, 1^st sentence: appended “using an open-drain output
that can be pulled up between 0.9 V and 3.6 V”.
• Section 2 “Features”: 1^st bullet item re-written.
• Table 1 “Ordering information”, Table note [1]: changed from “JEDEC WCE-3, TDFN” to
“JEDEC VCED-3 PSON8”
• Section 7.3.2.1 “Alarm window”:
– 1^st Advisory notification, Competitor device: appended “(CEVNT)” to end of phrase
– 1^st Advisory notification, Work-around: appended “(CEVNT)” to end of phrase
– 2^nd Advisory notification, Competitor devices: changed from “... when new UPPER or LOWER and
Event bit 3 (EOCTL) are set ... “ to “when new UPPER or LOWER Alarm Windows and the EVENT
output are set ...”
– 2^nd Advisory notification, Work-around: appended “(EOCTL = 1)” to end of phrase
• Section 7.3.2.2 “Critical trip”
– 1^st paragraph, last sentence: changed from “... through the Clear EVENT bit ...”
to “... through the Clear EVENT bit (CEVNT) ...
– Advisory notification, Competitor devices: re-written
– Advisory notification, Work-around: changed from “Wait at least 125 ms before enabling EVENT
output, Intel will change Nehalem BIOS so that T_th(crit) is set for more than 125 ms before Event
bit 3 (EOCTL) is enabled and Event value is checked.” to “Wait at least 125 ms before enabling
EVENT output (EOCTL = 1), Intel will change Nehalem BIOS so that T_th(crit) is set for more than
125 ms before EVENT output is enabled and Event value is checked.
• Section 7.7 “SMBus Time-out”: added second “Remark” statement.
• Section 7.8 “SMBus ALERT”: added second “Remark” statement.
• Section 9.3 “Thermal considerations”: symbols used in Equation 1 are updated to match those used
in characteristics tables
• (old) Table 27 “SMBus AC characteristics” replaced in its entirety by (new) Table 27 “SMBus AC
characteristics”
• (old) Figure 27 “Definition of timing for F/S-mode devices on the I²C-bus” replaced by Figure 27 “AC
waveforms”
SE98A_1
20090305
Product data sheet
-
-
SE98A_2
Product data sheet
Rev. 02 — 6 August 2009
© NXP B.V. 2009. All rights reserved.
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