M30620FCAFP datasheet(175/615 Pages) RENESAS

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Mitsubishi microcomputers

M16C / 62A Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

A-D Converter

1-156

(4) Repeat sweep mode 0

In repeat sweep mode 0, the pins selected using the A-D sweep pin select bit are used for repeat sweep

A-D conversion. Table 1.17.5 shows the specifications of repeat sweep mode 0. Figure 1.17.7 shows the

A-D control register in repeat sweep mode 0.

Figure 1.17.7. A-D conversion register in repeat sweep mode 0

A-D control register 0 (Note)

Symbol

Address

When reset

ADCON0

03D616

00000XXX2

Analog input pin

select bit

CH0

Bit symbol

Bit name

Function

CH1

CH2

A-D operation mode

select bit 0

1 1 : Repeat sweep mode 0

MD0

MD1

Trigger select bit

0 : Software trigger

1 : ADTRG trigger

TRG

ADST

A-D conversion start flag

0 : A-D conversion disabled

1 : A-D conversion started

Frequency select bit 0

0 : fAD/4 is selected

1 : fAD/2 is selected

CKS0

A-D control register 1 (Note 1)

Symbol

Address

When reset

ADCON1

03D716

0016

Bit name

Function

Bit symbol

A-D sweep pin select bit

SCAN0

SCAN1

MD2

BITS

8/10-bit mode select bit

0 : 8-bit mode

1 : 10-bit mode

VCUT

OPA0

Vref connect bit

OPA1

A-D operation mode

select bit 1

1 : Vref connected

External op-amp

connection mode

bit (Note 2)

1 1

Invalid in repeat sweep mode 0

Note 1: If the A-D control register is rewritten during A-D conversion, the conversion result

is indeterminate.

Note 2: Neither “01” nor “10” can be selected with the external op-amp connection mode bit.

b4 b3

When single sweep and repeat sweep mode 0

are selected

0 0 : AN0, AN1 (2 pins)

0 1 : AN0 to AN3 (4 pins)

1 0 : AN0 to AN5 (6 pins)

1 1 : AN0 to AN7 (8 pins)

b1 b0

0 0 : ANEX0 and ANEX1 are not used

0 1 : ANEX0 input is A-D converted

1 0 : ANEX1 input is A-D converted

1 1 : External op-amp connection mode

b7 b6

Note: If the A-D control register is rewritten during A-D conversion, the conversion result

is indeterminate.

Frequency select bit 1

0 : fAD/2 or fAD/4 is selected

1 : fAD is selected

CKS1

Set to “0” when this mode is selected

Item

Specification

Function

The pins selected by the A-D sweep pin select bit are used for repeat A-D conversion

Start condition

Writing “1” to A-D conversion start flag

Stop condition

Writing “0” to A-D conversion start flag

Interrupt request generation timing

None generated

Input pin

AN0 and AN1 (2 pins), AN0 to AN3 (4 pins), AN0 to AN5 (6 pins), or AN0 to AN7 (8 pins)

Reading of result of A-D converter

Read A-D register corresponding to selected pin (at any time)

Table 1.17.5. Repeat sweep mode 0 specifications

M30620FCAFP Datasheet(PDF) 175 Page - Renesas Technology Corp

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