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R01UH0823EJ0100 Rev.1.00 Page 1554 of 1823

Jul 31, 2019

RX23W Group 44. 12-Bit A/D Converter (S12ADE)

Sampling starts after discharging is completed during A/D conversion of the temperature sensor output, an auto-

discharging period of 15 ADCLK cycles is inserted before sampling.

OCSA Bit (Internal Reference Voltage A/D Conversion Select)

This bit selects A/D conversion of the internal reference voltage in single scan mode. When A/D conversion of the

internal reference voltage is to be performed, set all the bits in the ADANSA0, ADANSA1, ADANSB0, and ADANSB1

registers and the ADCSR.DBLE bit and TSSA bit should be set to all 0 in single scan mode.

The OCSA bit should be set while the ADCSR.ADST bit is 0. For A/D conversion of the internal reference voltage, the

ADDISCR.ADNDIS[4:0] bits should be automatically set to 0Fh to discharge the A/D converter before sampling. The

sampling time should be 5 μs or longer.

Sampling starts after discharging is completed during A/D conversion of the internal reference voltage, so an auto-

discharging period of 15 ADCLK cycles is inserted before sampling.

Renesas RX Series User Manual

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