32186 datasheet(518/1032 Pages) RENESAS

518 / 1032 page

A/D CONVERTER

11-20

32185/32186 Group Hardware Manual

Rev.1.10 REJ09B0235-0110 May 15, 07

(1) ADSMSL (A/D Conversion Mode Select) bit (Bit 8)

This bit selects A/D conversion mode when the A/D Converter is operating in single mode. Setting this

bit to "0" selects A/D conversion mode, and setting this bit to "1" selects comparator mode.

(2) ADSSPD (A/D Conversion Speed Select) bit (Bit 9)

This bit selects the A/D conversion speed when the A/D Converter is operating in single mode. Setting

this bit to "0" selects normal speed, and setting this bit to "1" selects double speed.

(3) ADSSHSL (A/D Conversion Method Select) bit (Bit 10)

This bit enables or disables the sample-and-hold function when the A/D Converter is operating in

single mode. Setting this bit to "0" disables the sample-and-hold function, and setting this bit to "1"

enables the sample-and-hold function.

Setting of this bit has no effect if comparator mode is selected with the ADSMSL (A/D conversion

mode select) bit.

(4) ADSSHSPD (A/D Sample-and-Hold Speed Select) bit (Bit 11)

When the A/D Converter’s sample-and-hold function is enabled, this bit selects a conversion speed.

When this bit is "0," the conversion speed is the same as normal A/D conversion speed. When this bit

is "1," conversion is performed at a speed faster than normal A/D conversion speed.

Setting of this bit has no effect if the sample-and-hold function is disabled by setting the ADSSHSL

(A/D conversion method select) bit to "0."

For details about the conversion time, see Section 11.3.4, “Calculating the A/D Conversion Time.”

(5) ANSEL (A/D Analog Input Pin Select) bits (Bits 12–15)

These bits select the analog input pins when the A/D Converter is operating in single mode. A/D

conversion or comparate operation is performed on the channels selected with these bits. If these bits

are accessed for read, the value written to them is read out.

11.2 A/D Converter Related Registers

32186 Datasheet(PDF) 518 Page - Renesas Technology Corp