M32C83T datasheet(258/527 Pages) RENESAS

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17. A/D Converter

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17.1.3 Single Sweep Mode

In single sweep mode, analog voltage that is applied to selected pins is converted one-by-one to a digital

code. Table 17.6 lists specifications of single sweep mode.

Table 17.6 Single Sweep Mode Specifications

Item

Specification

Function

Analog voltage, applied to pins selected by the SCAN1 to SCAN0 bits in the

ADiCON0 register (i=0, 1), are converted one-by-one to a digital code

Start Condition

Same as one-shot mode

Stop Condition

• A/D conversion is completed (the ADST bit in the ADiCON0 register is set to "0"

when the internal trigger is selected)

• The ADST bit is set to "0" (A/D conversion stopped) by program

Interrupt Request Generation Timing Sweep operation is completed

Analog Voltage Input Pins

Select from AN0 to AN1 (2 pins), AN0 to AN3 (4 pins), AN0 to AN5 (6 pins), AN0 to

AN7 (8 pins)

Select from ANj0 (j=0, 2, 15) to ANj1 (2 pins), ANj0 to ANj3 (4 pins), ANj0 to ANj5 (6

pins), or ANj0 to ANj7 (8 pins)

Reading of A/D Conversion Result The ADik register (k=0 to 7) corresponding to selected pins

17.1.4 Repeat Sweep Mode 0

In repeat sweep mode 0, analog voltage applied to selected pins is repeatedly converted to a digital code.

Table 17.7 lists specifications of repeat sweep mode 0.

Table 17.7 Repeat Sweep Mode 0 Specifications

Item

Specification

Function

Analog voltage, applied to pins selected by the SCAN1 to SCAN0 bits in the

ADiCON0 register (i=0, 1), are repeatedly converted to a digital code

Start Condition

Same as one-shot mode

Stop Condition

The ADST bit in the ADiCON0 register is set to "0" (A/D conversion stopped) by program

Interrupt Request Generation Timing Not generated

Analog Voltage Input Pins

Select from AN0 to AN1 (2 pins), AN0 to AN3 (4 pins), AN0 to AN5 (6 pins), AN0 to

AN7 (8 pins)

Select from ANj0 (j=0, 2, 15) to ANj1 (2 pins), ANj0 to ANj3 (4 pins), ANj0 to ANj5 (6

pins), or ANj0 to ANj7 (8 pins)

Reading of A/D Conversion Result The ADik register (k=0 to 7) corresponding to selected pins

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