Temperature Trip Point Registers
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.
Table 22: Alarm Temperature Lower Boundary Register (Address: 0x02)
Bit
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0 0 0 MSB LSB RFU RFU
Alarm window upper boundary temperature
Table 23: Alarm Temperature Lower Boundary Register (Address: 0x03)
Bit
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0 0 0 MSB LSB RFU RFU
Alarm window lower boundary temperature
Critical Temperature Register
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.
Table 24: Critical Temperature Register (Address: 0x04)
Bit
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0 0 0 MSB LSB RFU RFU
Critical temperature trip point
Temperature Register
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.
2GB (x72, ECC, DR) 200-Pin DDR2 SDRAM SORDIMM
Temperature Sensor with Serial Presence-Detect EEPROM
PDF: 09005aef83f287c1
hts18c256x72rhz.pdf - Rev. A 3/10 EN
21
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