M16CSLASH62 datasheet(170/615 Pages) RENESAS

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Mitsubishi microcomputers

M16C / 62A Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

A-D Converter

1-151

Figure 1.17.2. A-D converter-related registers (1)

A-D control register 0 (Note 1)

Symbol

Address

When reset

ADCON0

03D616

00000XXX2

Analog input pin select bit

0 0 0 : AN0 is selected

0 0 1 : AN1 is selected

0 1 0 : AN2 is selected

0 1 1 : AN3 is selected

1 0 0 : AN4 is selected

1 0 1 : AN5 is selected

1 1 0 : AN6 is selected

1 1 1 : AN7 is selected

(Note 2)

CH0

Bit symbol

Bit name

Function

CH1

CH2

A-D operation mode

select bit 0

0 0 : One-shot mode

0 1 : Repeat mode

1 0 : Single sweep mode

1 1 : Repeat sweep mode 0

Repeat sweep mode 1

(Note 2)

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)

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

0 : Any mode other than repeat sweep

mode 1

1 : Repeat sweep mode 1

0 : Vref not connected

1 : Vref connected

External op-amp

connection mode bit

b2 b1 b0

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

When repeat sweep mode 1 is selected

0 0 : AN0 (1 pin)

0 1 : AN0, AN1 (2 pins)

1 0 : AN0 to AN2 (3 pins)

1 1 : AN0 to AN3 (4 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 1: If the A-D control register is rewritten during A-D conversion, the conversion result is

indeterminate.

Note 2: When changing A-D operation mode, set analog input pin again.

Frequency select bit 1

0 : fAD/2 or fAD/4 is selected

1 : fAD is selected

CKS1

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

indeterminate.

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