SE98 Datasheet, PDF (15/39 Pages) NXP Semiconductors – DDR memory module temp sensor, 3.3 V

NXP Semiconductors
SE98
DDR memory module temp sensor, 3.3 V
8. Register descriptions
8.1 Register overview
This section describes all the registers used in the SE98. The registers are used for
latching the temperature reading, storing the low and high temperature limits, configuring,
the hysteresis threshold and the ADC, as well as reporting status. The device uses the
Pointer register to access these registers. Read registers, as the name implies, are used
for read only, and the write registers are for write only. Any attempt to read from a
write-only register will result in reading zeroes. Writing to a read-only register will have no
effect on the read even though the write command is acknowledged. The Pointer register
is an 8-bit register. All other registers are 16-bit.
Table 5. Register summary
Address
POR state
n/a
n/a
00h
0015h
01h
0000h
02h
0000h
03h
0000h
04h
0000h
05h
n/a
06h
1131h
07h
A101h
08h to 21h
0000h
22h
0000h
23h to FFh
0000h
Register name
Pointer register
Capability register C grade = 0015h
Configuration register
Upper Boundary Alarm Trip register
Lower Boundary Alarm Trip register
Critical Alarm Trip register
Temperature register
Manufacturer ID register
Device ID/Revision register
reserved registers
SMBus register
reserved registers
A write to reserved registers my cause unexpected results which may result in requiring a
reset by removing and re-applying its power.
SE98_4
Product data sheet
Rev. 04 — 2 February 2009
© NXP B.V. 2009. All rights reserved.
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