mt18jsf25672ay-1g1 Micron Semiconductor Products, mt18jsf25672ay-1g1 Datasheet - Page 16
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mt18jsf25672ay-1g1
Manufacturer Part Number
mt18jsf25672ay-1g1
Description
2gb, 4gb X72, Ecc, Dr 240-pin Ddr3 Sdram Udimm
Manufacturer
Micron Semiconductor Products
Datasheet
1.MT18JSF25672AY-1G1.pdf
(20 pages)
Table 20:
PDF: 09005aef83014429/Source: 09005aef83014466
JSF18C256_512x72A.fm - Rev. C 5/08 EN
10:9
Bit
0
1
2
3
4
5
6
7
8
Description
Event mode
0: Comparator mode
1: Interrupt mode
EVENT# polarity
0: Active LOW
1: Active HIGH
Critical event only
0: EVENT# trips on alarm or critical temperature event
1: EVENT# trips only if critical temperature is reached
Event output control
0: Event output disabled
1: Event output enabled
Event status
0: EVENT# has not been asserted by this device
1: EVENT# is being asserted due to an alarm window or
critical temperature condition
Clear event
0: No effect
1: Clears the event when the temperature sensor is in
the interrupt mode
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
Configuration Register Bit Descriptions
2GB, 4GB (x72, ECC, DR) 240-Pin DDR3 SDRAM UDIMM
16
Notes
Event mode cannot be changed if either of the lock bits
is set.
EVENT# polarity cannot be changed if either of the lock
bits is set.
This is a read-only field in the register. The event
causing the event can be determined from the read
temperature register.
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 both to the above alarm
window and the below alarm window bits found in the
read-only temperature register. EVENT# is also affected
by this register.
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Electrical Specifications
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