Intel Atom Processor N270 AU80586GE025D Data Sheet

Datasheet  

 23 

The processor supports the THERMTRIP# signal for catastrophic thermal protection. 

An external thermal sensor should also be used to protect the processor and the 

system against excessive temperatures. Even with the activation of THERMTRIP#, 

which halts all processor internal clocks and activity, leakage current can be high 

enough such that the processor cannot be protected in all conditions without the 

removal of power to the processor. If the external thermal sensor detects a 

catastrophic processor temperature of 125°C (maximum), or if the THERMTRIP# 

signal is asserted, the VCC supply to the processor must be turned off within 500 ms 

to prevent permanent silicon damage due to thermal runaway of the processor. 

THERMTRIP# functionality is not ensured if the PWRGOOD signal is not asserted. 

All other RSVD signals can be left as No Connect. Connection of these pins to V

CC

, V

SS

, 

or to any other signal (including each other) can result in component malfunction or 
incompatibility with future processors. See Section 

 

for a pin listing of the 

processor and the location of all RSVD pins.  

For reliable operation, always connect unused inputs or bidirectional signals to an 

appropriate signal level. Unused active low AGTL+ inputs may be left as no connects if 

AGTL+ termination is provided on the processor silicon. Unused active high inputs 

should be connected through a resistor to ground (V

SS

). Unused outputs can be left 

unconnected.  

The BSEL [2:0] signals are used to select the frequency of the processor input clock 

(BCLK [1:0]). These signals should be connected to the clock chip and the appropriate 

chipset on the platform. The BSEL encoding for BCLK [1:0] is shown in Table 4. 

L L H 133 

MHz