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Specifications Advance
TM
e720 Accelerator Card User Guide
10 Document No. 06-UG-1588 Revision: 1.B
ClearSpeed Technology plc
4.4.1 Temperature monitoring
The CSX700 and the FPGA contain on-die temperature-sensing diodes which are
connected to temperature-monitoring devices. Each device measures the remote
temperature (temperature of the measured die) and the local temperature (temperature of
the monitor chip itself). The temperature monitors signal warnings if the temperatures rise
above the thresholds shown in
Table 4.
There are two warnings:
z Temperature alert. This provides an indication to the driver software that the device is
becoming hot.
z Critical temperature. This turns off the device before it gets hot enough to cause
permanent damage.
4.4.2 Temperature shutdown
When the CSX700 reaches a critical temperature it is immediately held in reset so that it can
cool and avoid being damaged. When the CSX700 has cooled by more than 25
o
C from the
critical threshold, it is brought out of reset.
Following a critical temperature reset your blade server may require a reboot to reconnect to
the ClearSpeed e720.
4.5 Patents
This product is protected by US Patent 7346722 and 7363472; UK patents 2341770,
2348980, 2348984, 2348974, 2348973, 2348971, 2391093, 2394815 and 2390506, or
international equivalents. Other patents pending.
Condition Operating specification Storage specification
Temperature 10
o
C to 35
o
C (50
o
F to 95
o
F) -10
o
C to 70
o
C (14
o
F to 158
o
F)
Relative humidity 10 to 90% noncondensing up to 90% noncondensing
Table 3. Specifications for ambient conditions
Measurement
Temperature thresholds
Alert Critical
Local temperatures 85
o
C (185
o
F) N/A
Remote (die) temperatures 90
o
C (194
o
F) 110
o
C (230
o
F)
Table 4. Temperature warning thresholds