se97b NXP Semiconductors, se97b Datasheet - Page 30

• Manufacturer Part Number: se97b
• Description: Ddr Memory Module Temp Sensor With Integrated Spd
• Manufacturer: NXP Semiconductors

NXP Semiconductors
SE97B_1
Product data sheet
8.5.2 LOWER — Lower Boundary Alarm Trip register (03h, 16-bit read/write)
8.5.3 CRITICAL — Critical Alarm Trip register (04h, 16-bit read/write)
The value is the lower threshold temperature value for Alarm mode. The data format is
2’s complement with bit 2 = 0.25 °C. RFU 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 superfluous interrupt activity.
Table 18.
Table 19.
The value is the critical temperature. The data format is 2’s complement with
bit 2 = 0.25 °C. RFU bits will always report zero.
Table 20.
Table 21.
Bit
Symbol
Default
Access
Bit
15:13
12
11:2
1:0
Bit
Symbol
Default
Access
Bit
15:13
12
11:2
1:0
Bit
Symbol
Default
Access
Bit
Symbol
Default
Access
Symbol
RFU
SIGN
-
RFU
Symbol
RFU
SIGN
-
RFU
LOWER - Lower Boundary Alarm Trip register bit allocation
Lower Boundary Alarm Trip register bit description
CRITICAL - Critical Alarm Trip register bit allocation
Critical Alarm Trip register bit description
RFU
RFU
8 °C
R/W
8 °C
R/W
15
15
R
R
0
0
7
0
7
0
Rev. 01 — 27 January 2010
RFU
RFU
4 °C
4 °C
R/W
R/W
14
14
R
R
0
0
6
0
6
0
Description
Sign (MSB)
reserved; always ‘0’
Description
Sign (MSB)
reserved; always ‘0’
reserved; always ‘0’
Lower Boundary Alarm Trip Temperature (LSB = 0.25 °C)
reserved; always ‘0’
Critical Alarm Trip Temperature (LSB = 0.25 °C)
DDR memory module temp sensor with integrated SPD
RFU
RFU
2 °C
R/W
2 °C
R/W
13
13
R
R
0
0
5
0
5
0
SIGN
SIGN
R/W
R/W
1 °C
1 °C
R/W
R/W
12
12
0
0
4
0
4
0
128 °C
128 °C
0.5 °C
0.5 °C
R/W
R/W
R/W
R/W
11
11
0
0
3
0
3
0
0.25 °C
0.25 °C
64 °C
64 °C
R/W
R/W
R/W
R/W
10
10
0
0
2
0
2
0
© NXP B.V. 2010. All rights reserved.
32 °C
32 °C
R/W
R/W
RFU
RFU
9
0
R
9
0
R
1
0
1
0
SE97B
16 °C
16 °C
R/W
R/W
RFU
RFU
30 of 53
8
0
R
8
0
R
0
0
0
0