Temperature Sensing - Xycom Xembedded XPMC-6710 Reference Manual

XPMC-6710 PrPMC Hardware Reference Manual

Temperature Sensing

The XPMC-6710 uses a local and remote temperature sensor and over/under temperature
alarm, with the added ability to automatically cancel the effect of 3 kΩ (typical) of resistance
in series with the temperature monitoring diode. When the XPMC-6710 Temperature Sensor is
operating normally, the on-board ADC operates in a free-running mode. The analog input
multiplexer alternately selects either the on-chip temperature sensor to measure its local
temperature or the remote temperature sensor. The ADC digitizes these signals and the results
are stored in the local and remote temperature value registers. The I
Temperature Sensor is 0x4C.
The Temperature Sensor can accurately measure the temperature of a remote thermal diode to
±1° C and the ambient temperature to ±3° C. The temperature measurement range defaults to
0° C to +127° C, but can be switched to a wider measurement range of -55° C to +150° C.
18
2
C/SMBus address of the