mt9htf12872rhz Micron Semiconductor Products, mt9htf12872rhz Datasheet - Page 19

• Manufacturer Part Number: mt9htf12872rhz
• Description: Ddr2 Sdram Sordimm
• Manufacturer: Micron Semiconductor Products

Figure 4: Hysteresis Applied to Temperature Around Trip Points
Table 21: Hysteresis Applied to Alarm Window Bits in the Temperature Register
Temperature Format
PDF: 09005aef83ebee86
htf9c128x72rhz – Rev. A 3/10 EN
Condition
Clears
Sets
Above window bit
Below window bit
Notes:
The temperature trip point registers and temperature readout register use a 2’s comple-
ment format to enable negative numbers. The least significant bit (LSB) is equal to
0.0625°C or 0.25°C, depending on which register is referenced. For example, assuming
an LSB of 0.0625°C:
• A value of 0x018C would equal 24.75°C
• A value of 0x06C0 would equal 108°C
• A value of 0x1E74 would equal –24.75°C
Temperature
1. T
2. T
3. Hyst is the value set in the hysteresis bits of the configuration register.
Gradient
Falling
Rising
T
T
Below Alarm Window Bit
H
L
H
L
is the value set in the alarm temperature lower boundary trip register.
2
is the value set in the alarm temperature upper boundary trip register.
1
Temperature Sensor with Serial Presence-Detect EEPROM
Critical Temperature
1GB (x72, SR) 200-Pin DDR2 SDRAM SORDIMM
T
L
- Hyst
19
T
L
Micron Technology, Inc. reserves the right to change products or specifications without notice.
Temperature
Gradient
T
Falling
Rising
H
Above Alarm Window Bit
-
Hyst
3
© 2010 Micron Technology, Inc. All rights reserved.
T
L
-
Critical Temperature
Hyst
T
H
- Hyst
T
H