6. FUNCTIONAL DESCRIPTION
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EPSON
S1D15722D01B000 Technical Manual (Rev.1.1)
6.7 Temperature Sensor Circuit
This IC incorporates the temperature sensor circuit that consists of analog voltage output that changes on the
temperature gradient of -5.06 mV/°C (typ.). Liquid crystal display of appropriate contrasting density is
available in the wide temperature range by inputting the electronic volume register value according to the
temperature sensor output value from MPU and controlling the liquid crystal display voltage V
3
.
6.7.1 Analog Voltage Output
Inputting the temperature sensor ON command causes the analog voltage to be output from the SVD2 pin,
which varies according to the temperature. To control liquid crystal drive voltage with higher accuracy,
configure the system which can reduce variations in output voltage by allowing the MPU to give the feedback
of values of the output voltage sampled under certain temperature and store them as reference voltage.