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SE98 Datasheet, PDF (21/39 Pages) NXP Semiconductors – DDR memory module temp sensor, 3.3 V | |||
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NXP Semiconductors
SE98
DDR memory module temp sensor, 3.3 V
8.5 Temperature Trip Point registers
8.5.1 Upper Boundary Alarm Trip register (16-bit read/write)
The value is the upper threshold temperature value for Alarm mode. The data format is
2âs complement with bit 2 = 0.25 °C. âRFUâ bits will always report zero. Interrupts will
respond to the presently programmed boundary values. If boundary values are being
altered in-system, it is advised to turn off interrupts until a known state can be obtained to
avoid superï¬uous interrupt activity.
Table 12.
Bit
Symbol
Reset
Access
Bit
Symbol
Reset
Access
Upper Boundary Alarm Trip register bit allocation
15
14
13
12
11
RFU
SIGN
0
0
0
0
0
R
R
R
R/W
R/W
7
6
5
4
3
UBT[5:0]
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
10
9
8
UBT[9:6]
0
0
0
R/W
R/W
R/W
2
1
0
RFU
0
0
0
R/W
R
R
Table 13. Upper Boundary Alarm Trip register bit description
Bit
Symbol
Description
15:13 RFU
reserved; always 0
12
SIGN
Sign (MSB)
11:2
UBT
Upper Boundary Alarm Trip Temperature (LSB = 0.25 °C)
1:0
RFU
reserved; always 0
SE98_4
Product data sheet
Rev. 04 â 2 February 2009
© NXP B.V. 2009. All rights reserved.
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