M30201 datasheet(97/172 Pages) RENESAS

97 / 172 page

Mitsubishi microcomputers

M30201 Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

A-D Converter

Item

Specification

Function

All pins perform repeat sweep A-D conversion, with emphasis on the pin or

pins selected by the A-D sweep pin select bit

Example : AN0 selected

AN0

AN1

AN0

AN2

AN0

AN3, etc

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 (1 pin), AN0 and AN1 (2 pins), AN0 to AN2 (3 pins), AN0 to AN3 (4 pins) (Note)

Reading of result of A-D converter

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

(5) Repeat sweep mode 1

In repeat sweep mode 1, all pins are used for A-D conversion with emphasis on the pin or pins selected using the

A-D sweep pin select bit. (See Table 1.34.) Figure 1.89 shows the A-D control register in repeat sweep mode 1.

Figure 1.89. A-D conversion register in repeat sweep mode 1

Table 1.34. Repeat sweep mode 1 specifications

A-D control register 0 (Note)

Symbol

Address

When reset

ADCON0

03D616

00000XXX2

b3 b2

b1 b0

Analog input pin select bit

Invalid in repeat sweep mode 1

CH0

Bit symbol

Bit name

Function

CH1

CH2

A-D operation mode

select bit 0

1 1 : Repeat sweep mode 1

MD0

MD1

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

b3 b2

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

Vref connect bit

ADGSEL0

A-D operation mode

select bit 1

Set “1” in this mode.

1 : Vref connected

A-D input group select bit

b4 b3

0 : Port P6 group is selected

1 : Port P5 group is selected

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

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

indeterminate.

Note 2: AN50 to AN54 can be used in the same way as for AN0 to AN4.

Set this bit to “0”.

When single sweep and repeat sweep

mode 1 are selected

0 0 : AN0 (1 pins)

0 1 : AN0, AN1 (2 pins)

1 0 : AN0 to AN2 (3 pins)

1 1 : AN0 to AN3 (4 pins)

b1 b0

(Note 2)

Note : AN50 to AN54 can be used in the same way as for AN0 to AN4.

M30201 Datasheet(PDF) 97 Page - Renesas Technology Corp

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