Temperature Sensor Function; ( Μ Pd78F114Xa) Only); Configuration Of Temperature Sensor - NEC 78K0R/KE3 User Manual

10.5 Temperature Sensor Function (Expanded-Specification Products (
A temperature sensor performs A/D conversion for two voltages, an internal reference voltage (sensor 0 on the
ANI0 side) that depends on the temperature and an internal reference voltage (sensor 1 on the ANI1 side) that does
not depend on the temperature, and calculations, so that the temperature is obtained without depending on the AV
≥ 2.7 V).
voltage (AV
REF
Caution The temperature sensor cannot be used when low current consumption mode is set (RMC = 5AH)
or when the internal high-speed oscillator has been stopped (HIOSTOP = 1 (bit 0 of CSC
register)). The temperature sensor can operate as long as the internal high-speed oscillator
operates (HIOSTOP = 0), even if it is not selected as the CPU/peripheral hardware clock source.

10.5.1 Configuration of temperature sensor

The temperature sensor consists of an A/D converter and the following hardware.
• Temperature sensor 0: Outputs the internal reference voltage that depends on the temperature
• Temperature sensor 1: Outputs the internal reference voltage that does not depend on the temperature
ANI0/P20
(Analog input for normal
use of A/D converter)
Temperature sensor 0
ANI1/P21
(Analog input for normal
use of A/D converter)
Temperature sensor 1
ADISS
318
CHAPTER 10 A/D CONVERTER
Figure 10-15. Temperature Sensor Block Diagram
4
ADS3 ADS2 ADS1 ADS0
Analog input channel
specification register (ADS)
User's Manual U17854EJ9V0UD
Sample & hold circuit
A/D Voltage comparator
AV
SS
5
ADCS FR2 FR1 FR0 LV1 LV0 ADCE
A/D converter mode
register ( ADM)
Internal bus
μ
PD78F114xA) Only)
AV
ADCS bit
Successive
AV
approximation
register (SAR)
Controller
A/D conversion result
register (ADCR)
REF
REF
SS
INTAD