mt18hts25672rhy-53e Micron Semiconductor Products, mt18hts25672rhy-53e Datasheet - Page 16

• Manufacturer Part Number: mt18hts25672rhy-53e
• Description: 2gb, 4gb X72, Ecc, Dr 200-pin Ddr2 Sdram Sordimm
• Manufacturer: Micron Semiconductor Products

Table 22:
Figure 4:
Table 23:
PDF: 09005aef828665bd/Source: 09005aef828665a3
HTS18C_256_512x72RH.fm - Rev. B 5/08 EN
10:9
Bit
6
7
8
Condition
Description
Alarm window lock bit
0: Alarm trips are not locked and can be changed
1: Alarm trips are locked and cannot be changed
Critical trip lock bit
0: Critical trip is not locked and can be changed
1: Critical trip is locked and cannot be changed
Shutdown mode
0: Enabled
1: Shutdown
Hysteresis enable
00: Disable
01: Enable at 1.5°C
10: Enable at 3°C
11: Enable at 6°C
Clears
Sets
Configuration Register Bit Descriptions (continued)
Hysteresis
Hysteresis
Above window bit
Below window bit
Notes:
Temperature gradient
1. T
2. T
3. Hyst is the value set in the hysteresis bits of the configuration register.
T
T
H
L
H
L
1
2
Falling
Rising
is the value set in the alarm temperature lower boundary trip register.
is the value set in the alarm temperature upper boundary trip register.
Below Alarm Window Bit
2GB, 4GB (x72, ECC, DR) 200-Pin DDR2 SDRAM SORDIMM
Critical temperature
T
L
- Hyst
16
T
L
Notes
The shutdown mode is a power saving mode that
disables the temperature sensor.
When enabled, a hysteresis is applied to temperature
movement around the trip points. As an example, if
the hysteresis register is enabled to a delta of 6°C, the
preset trip points will toggle when the temperature
reaches the programmed value. These values will
reset when the temperature drops below the trip
points minus the set hysteresis level. In this case, this
would be critical temperature minus 6°C.
The hysteresis is applied to both the above alarm
window and the below alarm window bits found in
the read-only temperature register. EVENT# is also
affected by this register.
Micron Technology, Inc., reserves the right to change products or specifications without notice.
Temperature gradient
Falling
Rising
T
Above Alarm Window Bit
H
1
-
Hyst
3
Temperature Sensor
©2007 Micron Technology, Inc. All rights reserved.
T
2
L
-
Critical temperature
Hyst
3
T
H
T
- Hyst
H