M32CSLASH86 datasheet(267/505 Pages) RENESAS

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18. A/D Converter

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18.1.2 Repeat Mode

In repeat mode, analog voltage applied to a selected pin is repeatedly converted to a digital code. Table

18.3 lists specifications of repeat mode.

Table 18.3 Repeat Mode Specifications

Item

Specification

Function

The CH2 to CH0 bits in the AD0CON0 register, the OPA1 and OPA0 bits in the

AD0CON1 register and the APS1 and APS0 bits in the AD0CON2 register select a

pin. Analog voltage applied to the pin is repeatedly converted to a digital code

Start Condition

Same as one-shot mode

Stop Condition

The ADST bit in the AD0CON0 register is set to "0" (A/D conversion stopped) by

program

Interrupt Request Generation Timing • When the DUS bit in the AD0CON3 register is set to "0" (DMAC operating

mode disabled), no interrupt request is generated.

• When DUS bit is set to "1" (DMAC operating mode enabled), an interrupt request

is generated every time an A/D conversion is completed.

Analog Voltage Input Pins

Select one pin from ANi0 to ANi7 (i=none, 0, 2, 15), ANEX0 or ANEX1

Reading of A/D Conversion Result • When the DUS bit is set to "0", the microcomputer reads the AD0j register (j=0 to

7) corresponding to the selected pin.

• When DUS bit is set to "1", do not read the AD00 register. A/D conversion result

is stored in the AD00 register after the A/D conversion is completed. DMAC

transfers the conversion result to any memory space.

Refer to 13. DMAC for DMAC settings

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