mt18jsf25672az Micron Semiconductor Products, mt18jsf25672az Datasheet - Page 21

• Manufacturer Part Number: mt18jsf25672az
• Description: 2gb, 4gb X72, Ecc, Dr 240-pin Ddr3 Sdram Udimm
• Manufacturer: Micron Semiconductor Products

Temperature Trip Point Registers
Table 23: Alarm Temperature Lower Boundary Register (Address: 0x02)
Table 24: Alarm Temperature Lower Boundary Register (Address: 0x03)
Critical Temperature Register
Table 25: Critical Temperature Register (Address: 0x04)
Temperature Register
PDF: 09005aef83606b46
jsf18c256_512x72az.pdf – Rev. B 5/09
15
15
15
0
0
0
14
14
14
0
0
0
13
13
13
0
0
0
MSB
MSB
MSB
12
12
12
The upper and lower temperature boundary registers are used to set the maximum and
minimum values of the alarm window. LSB for these registers is 0.25°C. All RFU bits in
the register will always report zero.
The critical temperature register is used to set the maximum temperature above the
alarm window. The LSB for this register is 0.25°C. All RFU bits in the register will always
report zero.
The temperature register is a read-only register that provides the current temperature
detected by the temperature sensor. The LSB for this register is 0.0625°C with a resolu-
tion of 0.0625°C. The most significant bit (MSB) is 128°C in the readout section of this
register.
The upper three bits of the register are used to monitor the trip points that are set in the
previous three registers.
11
11
11
Temperature Sensor with Serial Presence-Detect EEPROM
10
10
10
Alarm window upper boundary temperature
Alarm window lower boundary temperature
2GB, 4GB (x72, ECC, DR) 240-Pin DDR3 SDRAM UDIMM
9
9
9
Critical temperature trip point
8
8
8
Bit
Bit
Bit
21
7
7
7
Micron Technology, Inc. reserves the right to change products or specifications without notice.
6
6
6
5
5
5
4
4
4
© 2009 Micron Technology, Inc. All rights reserved.
3
3
3
LSB
LSB
LSB
2
2
2
RFU
RFU
RFU
1
1
1
RFU
RFU
RFU
0
0
0