RL78 Family VDE Certified IEC60730/60335 Self Test Library
R01AN0749EG0201 Rev.2.01 Page 48 of 50
Mar 04, 2014
6.2 Additional Self Test Functions
The ADC includes additional inputs designed to help test the operation of the ADC. These include
• Temperature Sensor
• Internal Voltage Reference (1.44V)
• External Analogue Voltage Reference pins (AVrefP and AVrefM)
These internal analogue input pins can be used to verify the operation of the ADC against a known reference
point. The external pins can be set to (typically AVrefP < Vdd, AVrefM = Vss) additional measurement point
to establish the correct operation of the ADC.
Note the normal ADC input selection register (ADS) can be used for all inputs except the external reference
inputs which are set according to the table below.
Figure 27 ADC Self Test
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