Electrical, Power, and Thermal
An 8-bit register will store the temperature. The sensor measures from 0 to 127
degrees C measured in 0.5 degree increments in a register with values from 0 to 255.
Internal analog nodes (anode, cathode, and so forth) of this circuit will not be brought
out to package pins to keep noise at a minimum.
Refer to the Intel® 6400/6402 Advanced Memory Buffer Thermal Mechanical Design
Guide for more information on the thermal sensor.
4.7.1
Thermal Sensor Effects on the AMB’s
Functional Behavior
When enabled, the results of the thermal trip points TEMPLO and TEMPMID are
reported in FBD Status 0 responses following Sync commands.
If the temperature exceeds TEMPHI, errors are logged. If the TEMPHIENABLE bit in the
TEMPSTAT register is set, DDR shutdown occurs and FBD links go into electrical idle
mode. This over TEMPHI behavior also applies when in LAI mode. See the error chapter
for a more complete description of chip behavior when TEMPHI is exceeded.
A temperature TEMPSTAT.INCREASING bit is also generated depending on whether the
temp is greater or less than the last time the INCREASING bit was sampled. Sampling
to create INCREASING bit is controlled by writes to register UPDATED. When
temperature is above TEMPMID, this information also shows up in the
FBDS0.Thermal_Trip register field and in the Status response of FBD Sync commands
targeted to FBDS0.
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Intel® 6400/6402 Advanced Memory Buffer Datasheet
INTEL [ INTEL ]
